02354nas a2200253 4500008004100000022001400041245012100055210006900176260009200245300001200337490000700349520144900356653000901805653001601814653001201830653002101842653000801863100002101871700002601892700002001918700001801938700001801956856012601974 2008 eng d a1478-643500aPhotocatalytic activity and characterization of sol-gel-derived Cr(III)-doped TiO(2)-coated active carbon composites0 aPhotocatalytic activity and characterization of solgelderived Cr a4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLANDbTAYLOR & FRANCIS LTDcAPR a767-7790 v883 a

Cr(III)-doped, TiO(2)-coated active carbon (Cr-TiO(2)/AC) were prepared by a sol-gel method. The effect of supports, including TiO(2) and active carbon (AC), on the molecular structure and photocatalytic activity of chromium oxide for complete decomposition of EDTA has been examined with respect to the content of Cr on the catalyst surface. The photocatalytic activity of the Cr-TiO(2)/AC composites was evaluated in the decomposition of EDTA solution under UV irradiation. The results indicate that Cr-TiO(2)/AC has a higher efficiency in decomposition of EDTA than TiO(2), TiO(2)/AC or active carbon. This was attributed to the different functions of active carbon and chromate species. (1) Nanosize TiO(2) particles on composites were not reunited, possible because active carbon retards transformation of anatase into rutile and decreases the crystallite size. (2) Production of high concentrations of organic compound near Cr-TiO(2). (3) Carbon in active carbon causes some of the TiO(2) to reduce to Ti(3+) ions, which prevents electron-hole pair recombination. (4) Formation of polychromate species, with a stronger redox capability, on the surface of TiO(2)/AC. It was found that the addition of Cr to TiO(2) sol could suppress the grain growth of TiO(2) crystals and increase the hydroxyl content on the surface of TiO(2)/AC. The photocatalytic efficiency and activity of the composites remained good, even after three cycles.

10aEDTA10aphotoactive10asol-gel10aTitanium dioxide10aXPS1 aGambhire, A., B.1 aLande, Machhindra, K.1 aMandale, A., B.1 aPatil, K., R.1 aArbad, B., R. uhttps://library.ncl.res.in/content/photocatalytic-activity-and-characterization-sol-gel-derived-criii-doped-tio2-coated-002258nas a2200253 4500008004100000022001400041245008700055210006900142260010600211300001400317490000700331520135200338653001801690653001201708653002301720653001901743653002101762100002201783700001701805700002301822700001801845700002101863856012001884 2009 eng d a0013-468600aConducting polyaniline-nano-TiO2 composites for smart corrosion resistant coatings0 aConducting polyanilinenanoTiO2 composites for smart corrosion re aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcJAN a1249-12540 v543 a

Coatings prepared from polyaniline-nano-TiO2 particles synthesized by in situ polymerization were found to exhibit excellent corrosion resistance much superior to polyaniline (PANI) in aggressive environments. The corrosion Studies were carried out on steel plates coated with these formulations containing 10 wt% polyaniline prepared with different concentrations of nano-TiO2. The electrochemical impedance spectroscopy was studied at periodic intervals during exposure to hot saline (65 degrees C) conditions for prolonged durations over a period of 90 h. The open circuit potential (OCP) was found to shift with time from -0.38 V SCE to more anodic side (-0.2 V SCE) much above that of bare steel (-0.5 VSCE). The presence of nano-TiO2 was found to be vital in the prevention of corrosion and the shift of OCP to anodic side. From these data, one could envisage more than 100 times improvement in the corrosion resistance especially for polyaniline prepared with 4.18 wt% nano-TiO2. The exceptional improvement of performance of these coatings has been associated with the increase in barrier to diffusion, prevention of charge transport by the nanosize TiO2, redox properties of polyaniline as well as very large surface area available for the liberation of dopant due to nano-size additive. (C) 2008 Elsevier Ltd. All rights reserved.

10aAnticorrosion10aCoating10aconducting polymer10aNano-composite10aTitanium dioxide1 aRadhakrishnan, S.1 aSiju, C., R.1 aMahanta, Debajyoti1 aPatil, Satish1 aMadras, Giridhar uhttps://library.ncl.res.in/content/conducting-polyaniline-nano-tio2-composites-smart-corrosion-resistant-coatings-002472nas a2200349 4500008004100000022001400041245015100055210006900206260000900275300001600284490000700300520122500307653002401532653001101556653002801567653001801595653002001613653002101633100002901654700003201683700002901715700002901744700002401773700003101797700003001828700002001858700003101878700002401909700003001933700003101963856012801994 2022 eng d a0360-319900aEnhanced hydrogen fuel production using synergistic combination of solar radiation and TiO2 photocatalyst coupled with Burkholderia cepacia lipase0 aEnhanced hydrogen fuel production using synergistic combination  cAPR  a14483-144920 v473 a

Promising and sustainable alternatives for hydrogen production have been investigated. Among these, the use of enzymes may represent an efficient alternative. In this work, an increase in hydrogen production under simulated sunlight by combining TiO2 and TiO2/MgCl2 with Burkholderia cepacia lipase (BCL) was reported. The samples (TiO2, TiO2/MgCl2, and TiO2 /MgCl2/BCL) were characterized by X-ray diffraction (XRD), thermo-gravimetric (TGA), N-2 adsorption-desorption isotherms (BET), scanning electron microscopy (SEM), and UV-Visible absorption spectra. Hydrogen production tests were performed in aqueous methanol solutions under simulated sunlight. The results demonstrated that 130-times greater increase in hydrogen production rate was observed by the addition of BCL than individual TiO2. This better hydrogen production rate can be attributed to the increase in the amount of reduction equivalent of the system due to the oxidation of protein peptides caused by TiO2. In conclusion, the results indicate that hydrogen production efficiency can be significantly improved when integrating TiO2/MgCl2 with BCL. (C) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

10ahydrogen production10aLipase10aNano-conjugated enzymes10aPhotocatalyst10aSolar radiation10aTitanium dioxide1 aBrandao, Luma, Mirely de1 aBarbosa, Milson, dos Santos1 ade Jesus, Roberta, Anjos1 aBharad, Pradnya, Arunrao1 aLima, Alvaro, Silva1 aSoares, Cleide, Mara Faria1 aYerga, Rufino, Manuel Nav1 aBilal, Muhammad1 aFerreira, Luiz, Fernando R1 aIqbal, Hafiz, M. N.1 aGopinath, Chinnakonda, S.1 aFigueiredo, Renan, Tavares uhttps://library.ncl.res.in/content/enhanced-hydrogen-fuel-production-using-synergistic-combination-solar-radiation-and-tio2