02203nas a2200253   4500008004100000022001400041245008000055210006900135260007300204300001000277490000800287520136700295653001201662653001001674653002401684653001101708653003401719653001201753100001901765700002001784700001801804700002001822856010701842       2005                        eng d  a0040-603100aCharacterization of nanocrystalline anatase titania: an in situ HTXRD study0 aCharacterization of nanocrystalline anatase titania an in situ H  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcMAR  a37-410 v4273 a<p>Nanocrystalline titania was synthesized by the hydrolysis of titanium iso-propoxide using ultrasonication. The powder XRD patterns of the sample were recorded in static air and vacuum using a Philips X-pert Pro diffractometer equipped with a high-temperature attachment (HTK16) from room temperature (298 K) to 1173 K and were analyzed by the Rietveld refinement technique. The anatase to rutile phase transformation was observed at 1173 K for the data collected in static air. Only 3% of anatase titania transformed to rutile when the experiments were carried out at H 73 K in vacuum. The phase transformation from anatase to rutile is accompanied by a continuous increase in the crystallite size of the anatase phase from 9 nm at room temperature to 28 nm at 873 K and then to 50 nm at 1173 K in air while the process of crystallite growth was suppressed in vacuum. A linear increase in the unit cell parameters `a' and `c', and thus, an overall linear increase in the unit cell volume was observed as a function of temperature in static air as well as vacuum. The lattice and volume thermal expansion coefficients (TEC), alpha(a), alpha(c), and alpha(v) at 873 K are 8.57 x 10(-6), 8.71 x 10(-6) and 25.91 x 10(-6) K-1 in air and 18.01 x 10(-6), 14.95 x 10(-6) and 51.13 x 10(-6) K-1 in vacuum, respectively. (C) 2004 Elsevier B.V. All rights reserved.</p>10aAnatase10aHTXRD10aRietveld refinement10arutile10athermal expansion coefficient10atitania1 aJagtap, Neelam1 aBhagwat, Mahesh1 aAwati, Preeti1 aRamaswamy, Veda  uhttps://library.ncl.res.in/content/characterization-nanocrystalline-anatase-titania-situ-htxrd-study-002531nas a2200277   4500008004100000022001400041245010800055210006900163260007300232300001200305490000800317520157300325653000601898653002601904653002901930653001501959653002001974653001301994653001702007653001202024100002302036700002102059700001702080700002802097856012802125       2006                        eng d  a1381-116900aHeteropoly acid supported on titania as solid acid catalyst in alkylation of p-cresol with tert-butanol0 aHeteropoly acid supported on titania as solid acid catalyst in a  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcAUG  a324-3340 v2563 a<p>Butylation of p-cresol with tert-butanol was investigated on titania modified with 12-tungstophosphoric acid (TPA/TiO2) catalyst under vapor phase conditions. Catalysts with different TPA loadings (10-25 wt.%) and calcination temperatures (650-750 degrees C) were prepared by suspending titanium hydroxide in methanol solution of TPA followed by drying and calcination. These catalysts were characterized by surface area, XRD, P-31 MAS NMR, XPS, NH3-TPD, and FTIR pyridine adsorption. XRD results indicated that the presence of TPA retarded the crystallization of titania and stabilized TiO2 in anatase phase. P-31 MAS NMR indicated the presence of TPA in various forms (dispersed, highly fragmented and Keggin intact). These catalysts showed both Bronsted and Lewis acidity, and 20% TPA on TiO2 calcined at 700 degrees C (from here after words 20% TT 700) had the highest Bronsted as well as total acidity. Further, the catalytic activities were examined in tert-butylation of p-cresol with tent-butanol. The catalytic activity depended on TPA coverage, and the highest activity corresponded to the monolayer of TPA on titania. The most active catalyst 20% TT-700 gave 82% conversion of p-cresol and 89.5% selectivity towards 2-tert-butyl cresol (TBC), 2,6-di-tert-butyl cresol (DTBC) 7.5% and cresol-tert-butyl ether (CTBE) 3% under optimized conditions. The activity was always higher than that of WO3/ZrO2, sulfated zirconia (SZ), USY, H-beta zeolites and montmorillonite K-10 (K-10mont) under similar conditions. (c) 2006 Elsevier B.V. All rights reserved.</p>10a210a2-tert-butyl-p-cresol10a6-di-tert-butyl-p-cresol10aAlkylation10aheteropoly acid10ap-Cresol10atert-butanol10atitania1 aKumbar, Suresh, M.1 aShanbhag, G., V.1 aLefebvre, F.1 aHalligudi, Shivaraj, B.  uhttps://library.ncl.res.in/content/heteropoly-acid-supported-titania-solid-acid-catalyst-alkylation-p-cresol-tert-butanol-002169nas a2200253   4500008004100000022001400041245008600055210006900141260006900210300001200279490000700291520130700298653001901605653002101624653002301645653001201668100002201680700001901702700002001721700001801741700001701759700002201776856011701798       2006                        eng d  a0254-058400aRoom temperature synthesis of mesoporous aggregates of anatase TiO2 nanoparticles0 aRoom temperature synthesis of mesoporous aggregates of anatase T  aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcJUN  a207-2120 v973 a<p>The controlled hydrolysis reaction of titanium tetrabutoxide in presence of acetic acid in isopropanol, i.e. in non-aqueous media was adopted in the present work for the synthesis of nanocrystalline titania followed by aging at ambient conditions for longer duration. The powder XRD shows that the as-dried precursor (without any aging) is non-crystalline in nature. However, room temperature aging for longer duration &gt; 120 days not only helped to develop crystallinity in TiO2 nanoparticles but also led to the formation of their self-assembly towards mesoporous aggregates creating sponge like TiO2 nano-structure having high surface area similar to 250m (2) g(-1)and narrow pore size distribution of 4-5 nm. TEM observations revealed the generation of spherical TiO2 nanoparticles (4-5 nm) assembled to form stable spongy scaffold having porous network structure with pore size 5-6 nm. Also, presence of a pronounced hysteresis loop in BET isotherm is indicative of a 3D-intersection network of the pores of size 4-5 nm. Further heat-treatment to the aged precursor at 400 degrees C/2 h in air modify pore network structure due to sintering of TiO2 particles as is observed in TEM studies and lowering thereby the surface area to 125 m(2) g(-1) (c) 2005 Elsevier B.V. All rights reserved.</p>10aMicrostructure10aporous materials10asol-gel processing10atitania1 aDeshpande, S., B.1 aPotdar, H., S.1 aKhollam, Y., B.1 aPatil, K., R.1 aPasricha, R.1 aJacob, Nalini, E.  uhttps://library.ncl.res.in/content/room-temperature-synthesis-mesoporous-aggregates-anatase-tio2-nanoparticles-002130nas a2200253   4500008004100000022001400041245007300055210006900128260009500197300001200292490000800304520125100312653003501563653002401598653001301622653001201635100002101647700002901668700001501697700001701712700001901729700002101748856010701769       2007                        eng d  a0021-979700aTitania nanoparticles synthesis in mesoporous molecular sieve MCM-410 aTitania nanoparticles synthesis in mesoporous molecular sieve MC  a525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USAbACADEMIC PRESS INC ELSEVIER SCIENCEcOCT  a310-3160 v3143 a<p>Nanocrystalline titanium oxide (TiO2) is one of the most useful oxide material, because of its widespread applications in photocatalysis, solar energy conversion, sensors and optoelectronics. The control of particle size and monodispersity of TiO2 nanoparticles is a challenging task. The use of MCM-41, an inorganic template of uniform pore size (2-10 nm), can overcome this difficulty and produce stable nanoparticles of uniform size and shape. Here, we demonstrate the synthesis of titania nanoparticles inside the pores of silica based MCM-41 forming a TiO2/Si-MCM composite. Composites are formed in the alcoholic medium by incipient wetness impregnation method. Titania particles of average 3 nm size are obtained. Effect of silica and titania precursors on the quality of nanoparticles has been investigated. The characterization of titania-MCM-41 composites has been carried out using a variety of techniques like UV-vis absorption spectroscopy, X-ray diffraction, FT-IR spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy and photoluminescence spectroscopy. It has been found that the titania particles are co-ordinated with Si-MCM by Si-O-Ti covalent bond. (C) 2007 Elsevier Inc. All rights reserved.</p>10aincipient wetness impregnation10aMesoporous material10atemplate10atitania1 aLihitkar, N., B.1 aAbyaneh, Majid, Kazemian1 aSamuel, V.1 aPasricha, R.1 aGosavi, S., W.1 aKulkarni, S., K.  uhttps://library.ncl.res.in/content/titania-nanoparticles-synthesis-mesoporous-molecular-sieve-mcm-41-001391nas a2200241   4500008004100000022001400041245011500055210006900170260007300239300001200312490000600324520051400330653001700844653001800861653001800879653001900897653002400916653001200940653002700952100002300979700002801002856011901030       2007                        eng d  a1566-736700aTungstophosphoric acid supported on titania: a solid acid catalyst in benzylation of phenol with benzylalcohol0 aTungstophosphoric acid supported on titania a solid acid catalys  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcMAY  a800-8060 v83 a<p>{Benzylation of phenol with benzylalcohol was carried out in liquid phase over tungstophosphoric acid (TPA) supported on titania. The catalysts were prepared with different TPA (10-25%) loading by wet impregnation method, were calcined at 700 degrees C and characterized by XRD, surface area, FTIR and acidity of the catalysts was measured by temperature programmed desorption of NH(3)-TPD, FTIR pyridine adsorption. The catalysts have been represented by a general formula as xPTiO(2)-Y (where x = wt%</p>10abenzyl ether10abenzyl phenol10abenzylalcohol10aHeteropolyacid10aphenyl benzyl ether10atitania10atungstophosphoric acid1 aKumbar, Suresh, M.1 aHalligudi, Shivaraj, B.  uhttps://library.ncl.res.in/content/tungstophosphoric-acid-supported-titania-solid-acid-catalyst-benzylation-phenol01741nas a2200241   4500008004100000022001400041245009600055210006900151260007300220300001200293490000600305520089500311653001201206653001601218653002101234653000901255653001201264653003401276100002101310700001301331700002801344856012701372       2008                        eng d  a1566-736700aAlkene epoxidation catalyzed by vanadomolybdophosphoric acids supported on hydrated titania0 aAlkene epoxidation catalyzed by vanadomolybdophosphoric acids su  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcMAR  a931-9380 v93 a<p>Vanadomolybdophosphoric acids wet-impregnated oil hydrated titania (TiO(2) - xH(2)O), make ail efficient catalytic system for the epoxidation of a variety of alkenes with organic solvent extracted TBHP as the oxidant. By,in appropriate choice of solvent, the catalyst call be reused at least three times without much loss in the activity for subsequent runs. XRD shows that the heteropoly acid is uniformly dispersed over the support and up to 15 wt% loading of the heteropoly acid, no additional peak of the same call be seen in the XRD pattern of the catalyst. The reactivity varied with the nature of alkene but the major product was always the corresponding epoxide. The catalytic system is free of high temperature calcination steps and tedious multi-step procedures, normally encountered in the heter-ogenization of heteropoly acids. (c) 2007 Elsevier B.V. All rights reserved.</p>10aalkenes10aepoxidation10aheteropoly acids10aTBHP10atitania10avanadomolybdophosphoric acids1 aIngle, Rohit, H.1 aVinu, A.1 aHalligudi, Shivaraj, B.  uhttps://library.ncl.res.in/content/alkene-epoxidation-catalyzed-vanadomolybdophosphoric-acids-supported-hydrated-titania-001641nas a2200253   4500008004100000022001400041245010000055210006900155260007300224300001400297490000600311520074000317653002101057653001401078653002401092653001201116653001401128100002501142700002301167700002101190700001901211700002801230856012901258       2008                        eng d  a1566-736700aTitania supported silicotungstic acid: an efficient solid acid catalyst for veratrole acylation0 aTitania supported silicotungstic acid an efficient solid acid ca  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJUN  a2026-20290 v93 a<p>Titania supported silicotungstic acid (STA) with different STA loading (10-25 wt%) and calcination temperature (650-750 degrees C) were prepared by wet impregnation method. The catalysts have been represented by a general formula xSTiO(2)y (where x denotes wt%, S denotes STA and y denotes calcination temperature in degrees C). These catalysts were characterized by techniques such as X-ray diffraction, surface analysis, FTIR-pyridine and TPD-NH(3) and were used as heterogeneous solid acid catalysts in the liquid phase acylation of veratrole with acetic anhydride (Ac(2)O). It was found that 20STiO(2)700 gave the highest activity in acylation reaction due to its highest acidity. (C) 2008 Elsevier B.V. All rights reserved.</p>10aacetic anhydride10aAcylation10aSilicotungstic acid10atitania10averatrole1 aWaghmare, Nilesh, G.1 aKasinathan, Palraj1 aAmrute, Amol, P.1 aLucas, Nishita1 aHalligudi, Shivaraj, B.  uhttps://library.ncl.res.in/content/titania-supported-silicotungstic-acid-efficient-solid-acid-catalyst-veratrole-acylation-001736nas a2200289   4500008004100000022001400041245011300055210006900168260005700237300001200294490000800306520078800314653002001102653001901122653001101141653001201152653001201164653001701176100001401193700001801207700001501225700001301240700002101253700001801274700002301292856013101315       2009                        eng d  a1011-372X00aEnhanced solar-radiation induced photocatalytic activity of surface-modified nanocrystalline anatase-titania0 aEnhanced solarradiation induced photocatalytic activity of surfa  a233 SPRING ST, NEW YORK, NY 10013 USAbSPRINGERcMAR  a137-1430 v1283 a<p>Sol-gel derived pure nanocrystalline (similar to 20-30 nm) anatase-titania has been surface-modified by depositing silver(I) oxide and silver (predominantly the former) via UV-reduction process. The pure and surface-modified nanocrystalline anatase-titania have been characterized using different analytical techniques for determining the average nanocrystallite size, phase-contents, surface-chemistry, as well as the absorption and photoluminescence characteristics. It is demonstrated that, the latter exhibits an enhanced solar-radiation induced photocatalytic activity as compared to that of the former as a result of the absorption in the visible-region and enhanced photo-induced e(-)/h(+) life-time, both caused by the surface-deposition of silver(I) oxide and silver.</p>10aNanocrystalline10aPhotocatalysis10aSilver10asol-gel10atitania10aUV-reduction1 aPriya, R.1 aBaiju, K., V.1 aShukla, S.1 aBiju, S.1 aReddy, M., L. P.1 aPatil, K., R.1 aWarrier, K., G. K.  uhttps://library.ncl.res.in/content/enhanced-solar-radiation-induced-photocatalytic-activity-surface-modified-nanocrystalline-002352nas a2200265   4500008004100000022001400041245011700055210006900172260007300241300001400314490000800328520145300336653001101789653001601800653001101816653001901827653001201846653001201858100001701870700001801887700001501905700001401920700002301934856012901957       2009                        eng d  a0169-433200aNovel electroless process for copper coating of flyash using titania/ultraviolet-radiation/metal catalyst-system0 aNovel electroless process for copper coating of flyash using tit  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcAPR  a6696-67040 v2553 a<p>A novel electroless process has been demonstrated in this investigation to coat the surface of flyash particles with a conducting metal such as copper. The conventional electroless process has been modified for this purpose by replacing the tin-palladium catalyst-system with the titania/ultraviolet-radiation/metal catalyst-system, where the metal is either copper or silver as demonstrated here. The mechanism of copper coating of flyash particles in an electroless bath, using the novel methods of surface-sensitization and surface-activation, has been systematically studied by monitoring changes in the surface-morphology, surface-chemistry, and surface-structure of flyash particles using the scanning electron microscope, energy dispersive analysis of X-rays, X-ray photoelectron spectroscope, and X-ray diffraction. It has been revealed that the novel electroless method involves coating the flyash particles with titania photocatalyst via sol-gel, which acts as a surface-sensitizer under the ultraviolet-radiation exposure for the subsequent surface-activation with the copper- or silver-clusters. The latter in turn acts as surface-catalyst for the subsequent Cu-coating in an electroless bath. The proposed mechanism of surface-sensitization and surface-activation of flyash particles using the novel catalyst-system has been compared with that using the conventional catalyst-system. (C) 2009 Elsevier B. V. All rights reserved.</p>10aCopper10aElectroless10aFlyash10aPhotocatalysis10asol-gel10atitania1 aShijitha, T.1 aBaiju, K., V.1 aShukla, S.1 aPatil, K.1 aWarrier, K., G. K.  uhttps://library.ncl.res.in/content/novel-electroless-process-copper-coating-flyash-using-titaniaultraviolet-radiationmetal-001912nas a2200241   4500008004100000022001400041245010200055210006900157260009200226300001200318490000600330520101100336653001301347653002301360653001801383653001501401653001201416100002901428700002101457700003101478700003001509856013101539       2009                        eng d  a1533-488000aTemplate free synthesis of mesoporous TiO2 with high wall thickness and nanocrystalline framework0 aTemplate free synthesis of mesoporous TiO2 with high wall thickn  a26650 THE OLD RD, STE 208, VALENCIA, CA 91381-0751 USAbAMER SCIENTIFIC PUBLISHERScJAN  a371-3770 v93 a<p>A simple procedure to prepare nanocrystalline mesoporous titania (meso-TiO2) is reported without any templating agent and it possesses a high BET surface area and a large pore wall thickness (11.3 nm) than that of meso-TiO2 prepared by other methods. Nanocrystalline meso-TiO2 also has been synthesized with hexadecylamine template for comparison through known procedure. The meso-TiO2 materials were characterized by X-ray diffraction, FT-IR, UV-Vis absorbance spectra, thermal analysis, SEM, HRTEM and textural properties through N-2 adsorption-desorption isotherms. Spherical shape particles in a range of few hundred nanometers are obtained in the template free method. Above systematic characterization provides direct indications toward the mechanism of formation of meso-TiO2 in the template free method. A comparison of the physical and textural properties indicates a possibility of coarse-tuning of the textural characteristics of mesoporous TiO2 by adopting different preparation methods.</p>10aMesopore10aMesopore Formation10aTemplate-Free10aThick Wall10atitania1 aKulkarni, Dhanashree, G.1 aMurugan, Vadivel1 aViswanath, Annamraju, Kasi1 aGopinath, Chinnakonda, S.  uhttps://library.ncl.res.in/content/template-free-synthesis-mesoporous-tio2-high-wall-thickness-and-nanocrystalline-framework-002153nas a2200241   4500008004100000022001400041245009600055210006900151260007100220300001400291490000600305520132100311653001401632653001101646653001901657653002201676653001201698653001301710100002201723700002201745700003001767856011401797       2014                        eng d  a2155-543500aAmbient oxidation of benzene to phenol by photocatalysis on Au/Ti0.98V0.02O2: role of holes0 aAmbient oxidation of benzene to phenol by photocatalysis on AuTi  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcSEP  a2844-28530 v43 a<p>A potential photocatalyst with 2 atom % vanadium incorporated into the 1 lattice of disordered mesoporous titania, Ti0.98V0.02O2, (TV2) was synthesized. Au was deposited on TV2 (Au/TV2) through a photodeposition method. Structural, microscopy, and spectroscopy techniques support the incorporation of vanadium into the TiO2 lattice, and Au was deposited on the surfaces of TV2. Photocatalytic oxidation of benzene was conducted at ambient temperature under UV and/or visible light to demonstrate the catalytic activity of the Au/TV2 catalyst. The TV2 lattice exhibits a quantum jump in benzene to phenol oxidation compared to that of TiO2, highlighting the importance of V for oxidation. Introduction of Au onto TV2 further increases the benzene to phenol oxidation and phenol yield by a factor of 2 under UV light compared to those of bare TV2. No significant phenol production was observed in visible light with or without gold, indicating the role of gold is indirect toward charge separation and electron storage. Nano gold clusters on TV2 selectively store photoexcited electrons and in turn maximize holes utilization on TiO2. The high photocatalytic activity of Au/TV2 is mainly attributed to the presence of Schottky junctions, disordered mesoporosity, and short diffusion lengths for charge carriers.</p>10anano gold10aphenol10aPhotocatalysis10aSchottky junction10atitania10aVanadium1 aDevaraji, Perumal1 aSathu, Naveen, K.1 aGopinath, Chinnakonda, S.  uhttps://library.ncl.res.in/content/ambient-oxidation-benzene-phenol-photocatalysis-auti098v002o2-role-holes-000616nas a2200169   4500008004100000022001400041245008500055210006900140260000800209300001000217490000700227653001900234653004400253653001200297100002100309856011600330       2014                        eng d  a2053-273300aPorous porphyrin organic polymer for visible light triggered hydrogen production0 aPorous porphyrin organic polymer for visible light triggered hyd  cMAY  aC11450 v7010aPhotocatalysis10aPorous Porphyrin Organic Polymer (PPOP)10atitania1 aMukherjee, Gargi  uhttps://library.ncl.res.in/content/porous-porphyrin-organic-polymer-visible-light-triggered-hydrogen-production02085nas a2200241   4500008004100000022001400041245011900055210006900174260000800243300001200251490000600263520126900269653002001538653001201558653001801570653001201588653002001600100002601620700001701646700002001663700003001683856013001713       2018                        eng d  a2194-428800aMarginally hydrogenated triphasic titania nanotubes for effective visible-light photocatalytic hydrogen generation0 aMarginally hydrogenated triphasic titania nanotubes for effectiv  cFEB  a280-2880 v63 a<p>We report the first demonstration of hydrogen-annealed triphase TiO nanotubes (anatase-rutile-brookite) (T-ARB) as a visible-light-active photocatalyst for water splitting with high quantum efficiency. As-synthesized T-ARB was annealed under hydrogen atmosphere at 250 and 4508 degrees C for 2 h. We found that the tubular structures were retained in the hydrogenated TiO2 samples. It was observed that the concentrations of Ti3+ and the oxygen vacancies and their distribution significantly increased with respect to the hydrogen annealing temperature. Such changes in defects were found to be critical in enhancing the photocatalytic activity of the hydrogen-annealed triphase TiO2 nanotubes. The triphase TiO2 nanotubes hydrogen annealed at 450 degrees C were 16 times more efficient than pristine TiO2. Such an increase in the photocatalytic activity was explained by a triphase band diagram with defect states below the conduction band of each phase, which facilitated visible-light activity and easy transfer of charge carriers from one phase to another. Our study showed that the well-designed multiphase construction with oxygen vacancies enhanced the photocatalytic activity tremendously owing to the presence of a higher number of phase junctions.</p>10acharge transfer10aDefects10aHydrogenation10atitania10awater splitting1 aPreethi, Laguduva, K.1 aMathews, Tom1 aWalczak, Lukasz1 aGopinath, Chinnakonda, S.  uhttps://library.ncl.res.in/content/marginally-hydrogenated-triphasic-titania-nanotubes-effective-visible-light-photocatalytic03098nas a2200277   4500008004100000022001400041245012600055210006900181260000900250300001200259490000600271520215500277653001902432653001902451653001902470653001402489653001202503100002302515700002102538700002902559700002902588700002402617700001902641700003002660856013002690       2023                        eng d  a2574-096200aFacile one-pot synthesis of Cu x O/TiO2 photocatalysts by regulating Cu oxidation state for efficient solar H2 production0 aFacile onepot synthesis of Cu x OTiO2 photocatalysts by regulati  cDEC   a104-1160 v73 a<p>
	Development of highly efficient CuxO/TiO2 photocatalysts by regulating the oxidation state of Cu exclusively in either single or mixed oxidation state(s) is desirable but difficult to achieve without employing any external reagents. The present work describes a one-pot synthesis strategy to obtain CuxO/TiO2 photocatalysts with Cu in +1 and/or +2 by using a suitable combination of ethylene diamine tetra acetic acid (EDTA) and ethylene diamine, carefully varying the Cu content, and heat treatment process. CuxO/TiO2 nanocomposite catalysts were characterized thoroughly by physicochemical methods. Textural analysis indicates a high dispersion of CuxO on porous TiO2 with p-n heterojunctions between them in CuxO/TiO2 catalysts. UV-visible spectral analysis suggests the presence of CuxO on TiO2 with significantly extended absorption from the UV to the visible region. X-ray photoelectron spectroscopy (XPS) analysis indicates a strong synergetic interaction between TiO2 and CuxO due to the comparable CB potential and p-n heterojunction at the interface among them. Photoelectrochemical studies demonstrate excellent charge-carrier separation efficiency, low charge-transfer resistance, and high double-layer capacitance with Cu2O/TiO2 photocatalysts. Photocatalytic efficacy of a CuxO/TiO2 nanocomposite in thin-film form has been demonstrated for solar hydrogen generation in sunlight. The incorporation of Cu+ in TiO2 largely improves the H-2 production, and all of the CuxO/TiO2 nanocomposites in thin-film form exhibited higher efficiency compared to their particulate/suspension counterpart. Among the composite catalysts, TiCu-1 in thin-film form, with Cu exclusively in +1 oxidation state, exhibited a high hydrogen production rate of 7.06 mmol/hg, which is 6 times higher than its suspension counterpart; also catalysts containing mixed Cu-oxidation states exhibited about 60-70% activity as that of TiCu-1. The superior performance of Cu2O/TiO2 nanocomposites in thin-film form was due to their enhanced light harvesting ability, high mass transfer rate, and easy accessibility of the reactant species to the active sites.</p>
10aheterojunction10aPhotocatalysis10aSolar hydrogen10athin film10atitania1 aRajendran, Sivaraj1 aMani, Sunesh, S.1 aNivedhitha, Thazhath, R.1 aAsoka, Anantha, Krishnan1 aArun, Pushkaran, S.1 aMathew, Thomas1 aGopinath, Chinnakonda, S.  uhttps://library.ncl.res.in/content/facile-one-pot-synthesis-cu-x-otio2-photocatalysts-regulating-cu-oxidation-state-efficient01717nas a2200265   4500008004100000022001400041245014000055210006900195260000800264300001600272490000700288520082000295653001101115653001701126653002001143653001901163653001201182653001201194100002501206700002301231700002901254700002201283700002001305856012601325       2024                        eng d  a2190-681500aOne-pot catalytic conversion of sucrose to 1,2-propanediol over titania supported Ni-Ce metal catalyst under milder reaction conditions0 aOnepot catalytic conversion of sucrose to 12propanediol over tit  cOCT  a24703-247140 v143 a<p>
	The increased energy demand and decreasing fossil resources have driven the research community to look into a sustainable, green process to meet the energy demands. India being one of the top producers of sugarcane derived sucrose, and conversion of surplus sucrose to value chemicals is always an advantage. 5%Ni-15%Ce/TiO2 catalyst is found to produce high yield of 1,2-PDO (similar to 74%) under very mild reaction condition of 180 degrees C, 30 bar H-2 for 3-h reaction time. The characterization of the catalyst by using various physicochemical methods indicates the synergy between Ni-Ce bimetal which enhances the selective production of glycol. The low temperature and pressure requirement and the advantage of being the one-pot process will always attract the future scope of commercialization.</p>
10aGlycol10aLow pressure10aLow temperature10aNi-Ce catalyst10aSucrose10atitania1 aSreekantan, Sreejith1 aSreedharan, Sarath1 aKirali, Arun, Arunima Ba1 aYadav, Parmeshwar1 aMarimuthu, Banu  uhttps://library.ncl.res.in/content/one-pot-catalytic-conversion-sucrose-12-propanediol-over-titania-supported-ni-ce-metal02691nas a2200241   4500008004100000022001400041245015900055210006900214260000800283300001200291490000800303520180200311653003002113653001902143653001902162653003402181653001402215653001202229100002902241700003002270700002202300856012702322       2025                        eng d  a0360-319900aMultiphasic heterojunctions: a strategic approach to enhance the charge transfer dynamics of titania for superior solar photocatalytic hydrogen production0 aMultiphasic heterojunctions a strategic approach to enhance the   cMAR  a133-1460 v1133 a<p>
	Multiphasic titania has been prepared to study the role of multiple heterojunctions on the charge transfer dynamics and resultant photocatalytic hydrogen production. Through an acid regulated hydrothermal method, four materials with following phase compositions were prepared viz. single phase anatase and rutile, biphasic anatase-rutile and triphasic anatase-brookite-rutile. The phase compositions of the materials were confirmed through XRD and HRTEM studies. The biphasic and triphasic materials were found to be highly nanoparticulate in nature while forming numerous and diverse heterojunctions. In the triphasic material, various binary and ternary heterojunctions were observed. These heterojunctions performed in harmony to ensure efficient charge transport as shown by the low charge transfer resistance and high electron lifetime. This subsequently ensured a high reduction capability and photocurrent response. This all culminated into the triphasic material outperforming all other materials in solar photocatalytic hydrogen production. The H2 yield from the triphasic material was 81% and 40% higher than the pristine anatase and the biphasic material respectively. Additionally, by using the triphasic material in thin film form, a 4-fold increase in the hydrogen yield with a high apparent quantum efficiency of 8.2 % was achieved over the particulate form. The superior charge transport and photocurrent response due to the greater varied heterojunction formation in the anatase-rutile-brookite material as opposed to that in the biphasic material led to this superior performance. Thus, multiple heterojunctions, in this case, a triphasic heterojunction of anatase, rutile and brookite phases opens up a new avenue of research for efficient green hydrogen production.</p>
10aGreen hydrogen production10aheterojunction10aPhotocatalysis10aPhotoelectrochemical analysis10athin film10atitania1 aNingthoukhongjam, Pujita1 aGopinath, Chinnakonda, S.1 aNair, Ranjith, G.  uhttps://library.ncl.res.in/content/multiphasic-heterojunctions-strategic-approach-enhance-charge-transfer-dynamics-titania02326nas a2200277   4500008004100000022001400041245012700055210006900182260000800251490000700259520134800266653002301614653002601637653002401663653001901687653001201706100002001718700002701738700002901765700002401794700002301818700002801841700003001869700001801899856013101917       2025                        eng d  a1861-472800aSynthesis of Pd-integrated carbon Dot@TiO2 thin film for photocatalytic glycerol reforming reaction for producing hydrogen0 aSynthesis of Pdintegrated carbon DotTiO2 thin film for photocata  cNOV0 v203 a<p>
	A series of thin-film photocatalysts comprising TiO2 modified with carbon dots (CDs) dispersed either with palladium (Pd-CD/TiO2) or nickel (Ni-CD/TiO2) were synthesized via solid-state and wet-impregnation methods. Morphological characterization (HR-TEM, SEM-EDS) confirmed the anatase phase of TiO2 and the atomic dispersion of metal-integrated CDs on its surface. UV-vis DRS and XPS analyses revealed a marginal red shift in band-gap and the presence of sp2-hybridized graphitic carbon, and metal-carbon interactions, indicating enhanced light absorption and charge separation through Schottky junctions. Under direct sunlight illumination, Pd-CD/TiO2 thin film exhibited superior hydrogen yield (1167 mu mol g-1 h-1) and maintained stability over 25 h, outperforming Ni-CD/TiO2 (494 mu mol g-1 h-1) and bare TiO2 (166 mu mol g-1 h-1) photocatalyst thin films. Concurrent glycerol oxidation at neutral pH (pH similar to 7) yields glycolaldehyde (41% selectivity), formic acid, and dihydroxyacetone as value-added products. Enhanced photocurrent density and lower impedance of Pd-CD/TiO2 corroborate improved charge carrier separation and dynamics. The results demonstrate that Pd-CD synergistically improves the photocatalytic performance of the Pd-CD/TiO2 for sustainable hydrogen generation and selective biomass valorization.</p>
10aGlycerol oxidation10aGraphitic carbon dots10ahydrogen production10aPhotocatalysis10atitania1 aAbraham, Athira1 aSalgaonkar, Kranti, N.1 aNivedhitha, Thazhath, R.1 aEkal, Vishal, Ashok1 aKondhekar, Deepali1 aChakraborty, Shubhankar1 aGopinath, Chinnakonda, S.1 aSaha, Avishek  uhttps://library.ncl.res.in/content/synthesis-pd-integrated-carbon-dottio2-thin-film-photocatalytic-glycerol-reforming-reaction