01502nas a2200253   4500008004100000022001400041245010100055210006900156260007400225300001000299490000700309520062700316653001300943653002300956653002500979653002101004653001101025100002001036700001801056700001901074700001501093700001301108856012701121       2005                        eng d  a1385-344900aCo-precipitation method for the preparation of nanocrystalline ferroelectric SrBi2Nb2O9 ceramics0 aCoprecipitation method for the preparation of nanocrystalline fe  aVAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDSbSPRINGERcJAN  a83-870 v143 a<p>A simple co-precipitation technique had been successfully applied for the preparation of pure ultrafine single phase SrBi2Nb2O9. Ammonium hydroxide and ammonium oxalate were used to precipitate Sr2+, Bi3+ and Nb5+ cations simultaneously. No pyrochlore phase was found while heating powder at 850 C and pure SrBi2Nb2O9 (SBN) phase was formed as revealed by the X-ray diffraction (XRD) studies. Particle size and morphology was studied by transmission electron microscopy (TEM). The room temperature dielectric constant at 1 kHz is 100. The ferroelectric hysteresis loop parameters of these samples were also studied.</p>10aCeramics10aChemical synthesis10aelectronic materials10aferroelectricity10aOxides1 aGaikwad, S., P.1 aDhage, S., R.1 aPotdar, H., S.1 aSamuel, V.1 aRavi, V.  uhttps://library.ncl.res.in/content/co-precipitation-method-preparation-nanocrystalline-ferroelectric-srbi2nb2o9-ceramics-001527nas a2200253   4500008004100000022001400041245005000055210005000105260007300155300001400228490000700242520076300249653001301012653002301025653002401048653001101072653002101083100001801104700002201122700002201144700001501166700001301181856007901194       2005                        eng d  a0167-577X00aSynthesis of rutile from ATO and stearic acid0 aSynthesis of rutile from ATO and stearic acid  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcSEP  a2673-26750 v593 a<p>Nanocrystalline titanium dioxide in the rutile phase has been obtained from the solid state reaction between ammonium titanyl oxalate (ATO) and stearic acid at 400 degrees C in air. The fine powders of ATO and stearic acid are mixed well using acetone in an agate mortar and pestle for 2 h. This mixture (weight ratio of ATO to stearic acid &gt; 5) on heating at 400 degrees C produces rutile powders. For the ratios of ATO to stearic acid &lt; 5, a mixture of anatase and rutile phases is obtained. Pure ATO yields anatase phase on decomposition at 400 degrees C. These powders were characterized by X-ray diffraction (XRD), BET surface area measurements and transmission electron microscopy (TEM) studies. (c) 2005 Elsevier B.V. All rights reserved.</p>10aCeramics10aChemical synthesis10aElectron microscopy10aOxides10aX-ray techniques1 aPatil, M., M.1 aDeshpande, V., V.1 aDeshpande, S., B.1 aSamuel, V.1 aRavi, V.  uhttps://library.ncl.res.in/content/synthesis-rutile-ato-and-stearic-acid-001492nas a2200241   4500008004100000022001400041245005700055210005500112260010500167300001200272490000700284520071000291653001301001653002401014653002101038653001101059653002201070100002101092700002001113700001501133700001301148856008901161       2006                        eng d  a0250-470700aCoprecipitation technique to prepare Sr0.5Ba0.5Nb2O60 aCoprecipitation technique to prepare Sr05Ba05Nb2O6  aC V RAMAN AVENUE, SADASHIVANAGAR, P B \#8005, BANGALORE 560 080, INDIAbINDIAN ACADEMY SCIENCEScJUN  a221-2230 v293 a<p>An aqueous mixture of ammonium oxalate and ammonium hydroxide was used to coprecipitate barium and strontium ions as oxalates and niobium ions as hydroxide under basic conditions. This precursor on calcining at 750 degrees C yielded Sr0.5Ba0.5Nb2O6 phase. This is a much lower temperature than that prepared by traditional solid state method (1000 degrees C) as reported for the formation of Sr0.5Ba0.5Nb2O6 (SBN). Transmission electron microscopic (TEM) investigations revealed that the average particle size was 80 nm for the calcined powders. The room temperature dielectric constant at I kHz was found to be 1100. The ferroelectric hysteresis loop parameters of these samples were also studied.</p>10aCeramics10aElectron microscopy10aferroelectricity10aOxides10aX-ray diffraction1 aMurugan, Vadivel1 aGaikwad, A., B.1 aSamuel, V.1 aRavi, V.  uhttps://library.ncl.res.in/content/coprecipitation-technique-prepare-sr05ba05nb2o6-002121nas a2200241   4500008004100000022001400041245009900055210006900154260007300223300001200296490000700308520126100315653002101576653002501597653002701622653001101649653001301660653002501673100002301698700001501721700001801736856012501754       2006                        eng d  a0167-577X00aHydrothermal synthesis of MCM-41 using differently manufactured amorphous dioxosilicon sources0 aHydrothermal synthesis of MCM41 using differently manufactured a  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcAPR  a957-9610 v603 a<p>The influence of differently manufactured amorphous dioxosilicon sources such as fumed silica (FS), spray dried precipitated silica (PSI) and flash dried precipitated silica (PS,) on the course of structural development and properties of hydrothermally prepared siliceous MCM-41 phases have been investigated. Powder XRD, N-2 adsorption/desorption and scanning electron microscopy techniques were used for sample characterization. On the basis of results obtained from time dependent study on the progressive development of MCM-41 mesophases, the reactivity trend of dioxosilicon sources observed was as: FS &gt; PS1 &gt; PS2. MCM-41 synthesized using least expensive PS2 having less surface area has exhibited thicker pore walls but poor orderness, while MCM-41 prepared from expensive FS having high surface area has thinner pore walls and was well ordered. The extent of contraction caused by calcination, magnitude of the wall thickness and structural stability were found to be dependent on manufacturing process of dioxosilicon sources. The noticeable morphological differences were also observed by variations in the type of dioxosilicon sources used in the hydrothermal synthesis MCM-41 materials. (c) 2005 Elsevier B.V. All rights reserved.</p>10aCharacterization10adioxosilicon sources10aHydrothermal synthesis10aMCM-4110aporosity10aStructural stability1 aGaydhankar, T., R.1 aSamuel, V.1 aJoshi, P., N.  uhttps://library.ncl.res.in/content/hydrothermal-synthesis-mcm-41-using-differently-manufactured-amorphous-dioxosilicon-001534nas a2200253   4500008004100000022001400041245006500055210006500120260007300185300001400258490000700272520073300279653001301012653002301025653002401048653001101072653001101083653002201094100002101116700001501137700001901152700001301171856009601184       2006                        eng d  a0167-577X00aPhase evolution of NiTiO3 prepared by coprecipitation method0 aPhase evolution of NiTiO3 prepared by coprecipitation method  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJUL  a1791-17920 v603 a<p>A simple coprecipitation technique was used for the preparation of NiTiO3 powders. Ammonium carbonate solution was added to a solution mixture containing stoichiometric amounts of Ni(NO3)(2) and TiOCl2 to precipitate nickel as carbonate and titanium as hydroxide under basic conditions. The precipitate was calcined at different temperatures ranging from 100 to 800 degrees C and phase evolution of NiTiO3 was investigated by X-ray diffraction (XRD) studies. It is observed that nickel titanate was formed at 750 degrees C. For comparison, NiTiO3 was also prepared by standard ceramic process. Particle size and morphology was studied by transmission electron microscopy (TEM). (c) 2005 Elsevier B.V. All fights reserved.</p>10aCeramics10aChemical synthesis10aElectron microscopy10aNiTiO310aOxides10aX-ray diffraction1 aMurugan, Vadivel1 aSamuel, V.1 aNavale, S., C.1 aRavi, V.  uhttps://library.ncl.res.in/content/phase-evolution-nitio3-prepared-coprecipitation-method-001466nas a2200253   4500008004100000022001400041245006100055210006100116260007300177300001400250490000700264520066400271653002300935653002500958653001100983653001800994100002201012700001801034700002001052700001501072700001901087700001301106856009301119       2007                        eng d  a0167-577X00aCoprecipitation technique to prepare CoTa2O6 and CoNb2O60 aCoprecipitation technique to prepare CoTa2O6 and CoNb2O6  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcMAY  a2127-21290 v613 a<p>An aqueous solution of sodium hydroxide was used to coprecipitate cobalt and tantalum (or niobium) ions from their precursors as hydroxides under basic conditions. This precipitate yielded CoTa2O6 (CT) or CoNb2O6 (CN) ceramics on calcining at 700 degrees C, i.e. at a temperature much lower than 900 degrees C, reported for the formation of these powders prepared by the traditional solid state method. The X-ray diffraction (XRD) studies were employed to investigate phase contents and lattice parameters. The morphology of the synthesized powders was investigated by transmission electron microscopy (TEM). (c) 2006 Elsevier B.V. All rights reserved.</p>10aChemical synthesis10aelectronic materials10aOxides10aX-ray methods1 aMulla, Imtiaz, S.1 aNatarajan, N.1 aGaikwad, A., B.1 aSamuel, V.1 aGuptha, U., N.1 aRavi, V.  uhttps://library.ncl.res.in/content/coprecipitation-technique-prepare-cota2o6-and-conb2o601333nas a2200253   4500008004100000022001400041245004900055210004900104260007300153300001400226490000700240520056500247653002300812653002400835653002500859653001100884653001800895100001500913700002000928700001900948700001800967700001300985856008100998       2007                        eng d  a0167-577X00aCoprecipitation technique to prepare NiNb2O60 aCoprecipitation technique to prepare NiNb2O6  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcMAY  a2354-23550 v613 a<p>A mixture of ammonium carbonate and ammonium hydroxide was used to coprecipitate nickel and niobium ions as nickel carbonate and niobium hydroxide under basic conditions. This precursor yielded NiNb2O6 (NN) ceramics on calcining at 700 degrees C (at a temperature lower than 800 degrees C which is necessary for the formation of NiNb2O6 when prepared by the traditional solid state method). The average particle size and morphology of these powders were investigated by transmission electron microscope (TEM). (c) 2006 Elsevier B.V. All rights reserved.</p>10aChemical synthesis10aElectron microscopy10aelectronic materials10aOxides10aX-ray methods1 aSamuel, V.1 aGaikwad, A., B.1 aJadhav, A., D.1 aNatarajan, N.1 aRavi, V.  uhttps://library.ncl.res.in/content/coprecipitation-technique-prepare-ninb2o601481nas a2200241   4500008004100000022001400041245005500055210005500110260007300165300001400238490000700252520071500259653002300974653001100997653001801008653003701026653002201063100001901085700002001104700001501124700001301139856008701152       2007                        eng d  a0167-577X00aLow temperature route to prepare LaFeO3 and LaCoO30 aLow temperature route to prepare LaFeO3 and LaCoO3  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcAPR  a2030-20320 v613 a<p>A combination of digestion and further low temperature calcination to crystallize the product was employed to prepare LaFeO3 (LF) and LaCoO3 (LC) powders. Freshly co-precipitated lanthanum and ferric (or cobalt) hydroxide gels by sodium hydroxide were allowed to react at 100 degrees C under refluxing and stirring conditions for 4-6 h. These oven dried powders were heated at 450 degrees C to from crystalline LF (or LC) powders. The phase contents and lattice parameters were investigated by X-ray diffraction (XRD). Transmission electron microscope (TEM) investigations were carried out to examine the morphology and average particle size of these powders. (c) 2006 Elsevier B.V. All rights reserved.</p>10aChemical synthesis10aLaFeO310aPrecipitation10atransmission electron microscopy10aX-ray diffraction1 aJadhav, A., D.1 aGaikwad, A., B.1 aSamuel, V.1 aRavi, V.  uhttps://library.ncl.res.in/content/low-temperature-route-prepare-lafeo3-and-lacoo301416nas a2200253   4500008004100000022001400041245005700055210005700112260007300169300001200242490000700254520062500261653002300886653002400909653002500933653001100958653002200969100001500991700002001006700001901026700001801045700001301063856008601076       2007                        eng d  a0167-577X00aNovel technique to prepare LiNbO3 at low temperature0 aNovel technique to prepare LiNbO3 at low temperature  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcFEB  a765-7660 v613 a<p>Fresh niobium hydroxide was first precipitated from NbF5 solution using an aqueous ammonium hydroxide under basic conditions. Then a simple procedure of mixing lithium and niobium hydroxides together and heating at a low temperature (400 degrees C) produced pure ultrafine single phase LiNbO3 (LN). In the literature, this is the lowest temperature so far reported on the formation of LN. The phase content and lattice parameters are determined by X-ray diffraction (XRD). The average particle size and morphology were studied by transmission electron microscopy (TEM). (c) 2006 Elsevier B.V. All rights reserved.</p>10aChemical synthesis10aElectron microscopy10aelectronic materials10aLiNbO310aX-ray diffraction1 aSamuel, V.1 aGaikwad, A., B.1 aJadhav, A., D.1 aMirji, S., A.1 aRavi, V.  uhttps://library.ncl.res.in/content/novel-technique-prepare-linbo3-low-temperature01515nas a2200241   4500008004100000022001400041245008300055210006900138260009900207300001200306490000700318520067600325653001301001653002301014653002401037653001101061653001801072100002101090700002001111700001501131700001301146856011401159       2007                        eng d  a0272-884200aPreparation of nanocrystalline ferroelectric CaBi4Ti4O15 by citrate gel method0 aPreparation of nanocrystalline ferroelectric CaBi4Ti4O15 by citr  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDbELSEVIER SCI LTDcJAN  a569-5710 v333 a<p>A gel was formed when an aqueous solution of CaCl2, BiNO3, TiOCl2 and citric acid in stoichiometric ratio is heated on a water bath. This gel on decomposition at 700 degrees C produced nano crystallites of the ternary oxide, CaBi4Ti4O15 (CBT). The phase contents and lattice parameters were studied by the powder X-ray diffraction (XRD). Particle size and morphology was studied by transmission electron spectroscopy (TEM). The room temperature dielectric constant at 1 kHz is 390. The ferroelectric hysteresis loop parameters of these samples were also studied by a home-built Sawyer-tower circuit. (c) 2006 Elsevier Ltd and Techna Group S.H. All rights reserved.</p>10aCeramics10aChemical synthesis10aElectron microscopy10aOxides10aX-ray methods1 aMurugan, Vadivel1 aGaikwad, A., B.1 aSamuel, V.1 aRavi, V.  uhttps://library.ncl.res.in/content/preparation-nanocrystalline-ferroelectric-cabi4ti4o15-citrate-gel-method-001959nas a2200289   4500008004100000022001400041245007400055210006900129260009900198300001400297490000700311520103300318653001301351653002301364653000801387653001101395100001301406700002101419700001501440700002301455700001301478700001701491700001701508700001901525700002201544856010301566       2007                        eng d  a0272-884200aSynthesis of La0.7Sr0.3MnO3 at 800 degrees C using citrate gel method0 aSynthesis of La07Sr03MnO3 at 800 degrees C using citrate gel met  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDbELSEVIER SCI LTDcAUG  a1129-11320 v333 a<p>Manganite systems have been of considerable interest in the recent past due to their potential to operate in wide property range and also to serve as effective magnetic sensing and storing devices when synthesized using stringent conditions. We report a novel citrate gel method, in which La0.7Sr0.3MnO3 system has been synthesized at temperature 800 degrees C (LSMO800) with the synthesis duration is 6 h. The results have been compared with the sample synthesized at 1050 degrees C (LSMO1050). The synthesized bulk polycrystalline sample shows single-phase nature with the increase in particle size from similar to 50 nm to 300 nm with the increase in the sintering temperature. The magnetization data for LSMO800 shows well-defined hysteresis with saturation magnetization at around 1800 Oe and Curie temperature at 360 K, which is slightly lower than that of LSMO1050, which is 375 K. The results can be well attributed to the grain boundary effects. (C) 2006 Elsevier Ltd and Techna Group S.r.l. All rights reserved.</p>10aCeramics10aCitrate gel method10aCMR10aOxides1 aRavi, V.1 aKulkarni, S., D.1 aSamuel, V.1 aKale, Sangeeta, N.1 aMona, J.1 aRajgopal, R.1 aDaundkar, A.1 aLahoti, P., S.1 aJoshi, Rakesh, S.  uhttps://library.ncl.res.in/content/synthesis-la07sr03mno3-800-degrees-c-using-citrate-gel-method-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-41-001524nas a2200265   4500008004100000022001400041245006500055210006400120260009900184300001200283490000700295520068100302653001300983653002300996653002401019653001101043653000801054100001801062700001501080700001901095700001801114700001801132700001301150856009501163       2008                        eng d  a0272-884200aCo-precipitation method for preparation of Bi3TiNbO9 powders0 aCoprecipitation method for preparation of Bi3TiNbO9 powders  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDbELSEVIER SCI LTDcAPR  a675-6770 v343 a<p>A simple co-precipitation technique has been successfully used for the preparation of pure, ultrafine, single phase Bi3TiNbO9 (BTN). An aqueous ammonium hydroxide solution was used to simultaneously precipitate Bi3+, Ti4+ and Nb5+, cations as hydroxides under basic conditions (pH similar to 9). No pyrochlore phase was found while heating powder at 500 degrees C and pure BTN phase was found to be formed by X-ray diffraction (XRD). For comparison, BTN samples were also synthesized by the traditional solid state method. The sequence of phase formation in both cases were investigated by XRD studies. (c) 2007 Elsevier Ltd and Techna Group S.r.l. All rights reserved.</p>10aCeramics10aChemical synthesis10aelectronic material10aOxides10aXRD1 aGupta, U., N.1 aSamuel, V.1 aMuthurajan, H.1 aKumar, H., H.1 aPatil, S., D.1 aRavi, V.  uhttps://library.ncl.res.in/content/co-precipitation-method-preparation-bi3tinbo9-powders-001551nas a2200277   4500008004100000022001400041245005700055210005600112260009900168300001400267490000700281520069300288653001100981653001300992653002301005653002401028653001101052653002201063100001401085700001801099700001501117700001901132700001801151700001301169856009101182       2008                        eng d  a0272-884200aCo-precipitation technique to prepare BiNbO4 powders0 aCoprecipitation technique to prepare BiNbO4 powders  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDbELSEVIER SCI LTDcAUG  a1565-15670 v343 a<p>A simple co-precipitation technique was successfully used for the preparation of pure ultrafine single phase BiNbO4. A standard ammonium hydroxide solution was used to precipitate Bi3+ and Ta5+ cations as hydroxides simultaneously under basic conditions. For comparison, BN powders were also prepared by the traditional solid-state method. It is observed that the co-precipitation technique produces BiNbO4 on heating at 600 degrees C, whereas complete phase formation occurs only at 800 degrees C in the solid-state method. The phase contents and lattice parameters were Studied by powder X-ray diffraction (XRD). (C) 2007 Elsevier Ltd and Techna Group S.r.l. All rights reserved.</p>10aBiNbO410aCeramics10aChemical synthesis10aElectron microscopy10aOxides10aX-ray diffraction1 aRadha, R.1 aGupta, U., N.1 aSamuel, V.1 aMuthurajan, H.1 aKumar, H., H.1 aRavi, V.  uhttps://library.ncl.res.in/content/co-precipitation-technique-prepare-binbo4-powders-001457nas a2200253   4500008004100000022001400041245005900055210005900114260009900173300001200272490000700284520065200291653002500943653001300968653001600981653001200997653001801009100001901027700001801046700001501064700001801079700001301097856009301110       2008                        eng d  a0272-884200aNovel hydroxide precursors to prepare NaNbO3 and KNbO30 aNovel hydroxide precursors to prepare NaNbO3 and KNbO3  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDbELSEVIER SCI LTDcAPR  a671-6730 v343 a<p>Firstly, fresh niobium, hydroxide was precipitated from NbF5 solution using an aqueous ammonium hydroxide under basic conditions. Then a simple procedure of mixing potassium (or sodium) and niobium hydroxides together and heating at a low temperature (&lt;400 degrees C) produced KNbO3 (KN) or NaNbO3 (NN) powders. This is the lowest temperature so far reported for the formation of these phases. The phase content and lattice parameters are determined by X-ray diffraction (XRD). The average particle size and morphology were studied by scanning electron microscopy (SEM). (c) 2007 Elsevier Ltd and Techna Group S.r.l. All rights reserved.</p>10achemical preparation10aniobates10aPerovskites10apowders10aX-ray methods1 aMuthurajan, H.1 aKumar, H., H.1 aSamuel, V.1 aGupta, U., N.1 aRavi, V.  uhttps://library.ncl.res.in/content/novel-hydroxide-precursors-prepare-nanbo3-and-knbo3-001752nas a2200229   4500008004100000022001400041245012000055210006900175260008900244300001000333490000700343520092300350653001401273653001801287653000801305653000801313100002001321700002201341700001501363700001901378856012501397       2008                        eng d  a0971-458800aSynthesis of bismuth titanate (Bi4Ti3O12)powders via calcination of microwave-hydrothermally (MH) derived precursor0 aSynthesis of bismuth titanate Bi4Ti3O12powders via calcination o  aDR K S KRISHNAN MARG, NEW DELHI 110 012, INDIAbNATL INST SCIENCE COMMUNICATIONcFEB  a51-540 v153 a<p>Micrometer sized platelet-like particles of bismuth titanate (Bi4Ti3O12) ire prepared successfully by the calcination of a mixed-precursor in air. The mixed precursor is precipitated Under microwave-hydrothermal (MH) treatment via dissolution-recrystallization kinetics. The mixed precursor is precipitated in-situ by giving MH treatment (at 200 degrees C, 200 psi, and 30 min hold time) to the hydrolysed slurry containing Bi and Ti cations. The slurry was prepared by adding 20% aqueous KOH precipitant solution to a well-mixed stoichiometric nitrate solution containing Bi and Ti cations. XRD results revealed that the as-dried precursor consisted of a homogenous mixture of non-crystalline particles of Bi2O3 and TiO2. The calcination of the as-dried precursor at 700 degrees C/2 h in air resulted ill the formation of micron sized platelet like single-phase Bi4Ti3O12 powders having orthorhombic structure.</p>10aBi4Ti3O1210aMH processing10aSEM10aXRD1 aKhollam, Y., B.1 aDeshpande, S., B.1 aSamuel, V.1 aPotdar, H., S.  uhttps://library.ncl.res.in/content/synthesis-bismuth-titanate-bi4ti3o12powders-calcination-microwave-hydrothermally-mh-001884nas a2200253   4500008004100000022001400041245009800055210006900153260011000222300001000332490000700342520096700349653001701316653001601333653002001349653002201369653001401391100002201405700002501427700001901452700001501471700001801486856012601504       2010                        eng d  a0971-457X00aGas-phase oxidant-free oxidation of cyclohexanol over V2O5-MoO3-M2O (M = Na, K, Cs) catalysts0 aGasphase oxidantfree oxidation of cyclohexanol over V2O5MoO3M2O   aDR K S KRISHNAN MARG, PUSA CAMPUS, NEW DELHI 110 012, INDIAbNATL INST SCIENCE COMMUNICATION-NISCAIRcJAN  a43-490 v173 a<p>Oxidant-free oxidation (dehydrogenation) of cyclohexanol is carried out in a down-flow integral laboratory scale reactor using different alkali doped catalysts. The effect of reaction temperature, contact time (W/F) and doping of alkali metals is studied to check its effect on nature of prominent products of the reaction (cyclohexanone and cyclohexene). At lower temperature the cyclohexanone prevails whereas at higher temperature cyclohexene is observed in prominence. Acid-modified catalysts (with boron and phosphorous) facilitated cyclohexene selectivity whereas alkali modified catalysts facilitated cyclohexanone selectivity. Calcination of sodium modified catalyst at different temperatures under static condition affect characteristic phase intensity and cyclohexanone selectivity. XRD investigation showed formation of different inorganic phases as the characteristic of dopant. Cesium modified catalyst showed better dehydrogenation activity.</p>10aCyclohexanol10adehydration10aDehydrogenation10aElectronegativity10aV2O5-MoO31 aVyawahare, Y., K.1 aChumbhale, Vilas, R.1 aPardhy, S., A.1 aSamuel, V.1 aAswar, A., S.  uhttps://library.ncl.res.in/content/gas-phase-oxidant-free-oxidation-cyclohexanol-over-v2o5-moo3-m2o-m-na-k-cs-catalysts-002123nas a2200277   4500008004100000022001400041245016400055210006900219260007300288300001000361490000800371520109900379653001901478653002301497653001401520653002401534653001801558653002001576100002001596700002201616700001501638700002701653700001801680700001801698856012901716       2016                        eng d  a0167-577X00aSynthesis of Sn-containing anatase (TiO2) by sol-gel method and their performance in catalytic water splitting under visible light as a function of tin content0 aSynthesis of Sncontaining anatase TiO2 by solgel method and thei  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcMAY  a50-540 v1713 a<p>Sol-gel route was employed to prepare a series of Sn-containing anatase with different molar (Ti/Sn) ratios ranging from 49 to 1. Samples were characterized by powder XRD, UV-vis, XPS, SEM, EDAX, low temperature N-2 sorption technique and Raman Spectroscopy. Except anatase phase, no other crystalline phase was observed when Ti/Sn molar ratio was varied from 49 to 9 and for Sn free sample. However, further decrease in the ratio lead to the appearance of additional SnO2 phase whose peak intensities were increased with the increase in the tin content. Irrespective of tin content, all samples showed red-shift in UV-vis spectra. Moreover, samples showed Raman shift to higher vibration side from 143 cm(-1) to 147 cm(-1) indicating the doping of Sn2+ into TiO2. By virtue of low band gap, anatase crystallite size and an absence of XRD visible SnO2, ST (19) has shown maximum photocatalytic activity upon 1 wt% Pt loading. It has exhibited the highest rate (0.1264 mmole/g/h) for visible light induced hydrogen evolution by water splitting. (C) 2016 Elsevier B.V. All rights reserved.</p>10aSemiconductors10aSn2+ doped titania10aSnO2/TiO210aSol-gel preparation10avisible light10awater splitting1 aTangale, N., P.1 aNiphadkar, P., S.1 aSamuel, V.1 aDeshpande, Suvarna, S.1 aJoshi, P., N.1 aAwate, S., V.  uhttps://library.ncl.res.in/content/synthesis-sn-containing-anatase-tio2-sol-gel-method-and-their-performance-catalytic-water