02155nas a2200241 4500008004100000022001400041245009200055210006900147260006900216300001000285490000800295520127300303653003601576653002401612653001801636653001901654100002201673700002301695700002601718700002001744700002401764856012501788 2009 eng d a1010-603000aChlorophyll-based photocatalysts and their evaluations for methyl orange photoreduction0 aChlorophyllbased photocatalysts and their evaluations for methyl aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcMAY a83-890 v2043 a

Immobilization of chlorophyll on different functionalized mesoporous materials has been attempted. The replacement of butanediol with monoethanol amine has resulted in increase in chlorophyll loading by a factor of two. The maximum immobilization of chlorophyll was on MCM-41 functionalized with monoethanolamine MCM-41/MEA/Chl) as compared to other mesoporous materials. This material has been characterized using XRD, UV-vis diffuse reflectance spectroscopy, scanning electron microscopy (SEM-EDX) and fluorescence spectroscopy. The photocatalytic reduction of methyl orange (MO)was studied using MCM-41/MEA/Chl as photocatalyst under the visible light. The photocatalytic reduction of MO was 0.396 mg/g of MCM-41/MEA/Chl photocatalyst as compared to 0.508 mg/g of TiO(2) for that of Degussa P-25 photocatalyst. The effect of various operating parameters like catalyst loading, initial concentration and intensity of light has also been studied. Photocatalytic property of chlorophyll-based photocatalytic material indicates that chlorophyll acts as a reaction center, which absorbs visible light and generates electron, which is transferred to different electron acceptors reducing MO into derivative of hydrazine. (C) 2009 Elsevier B.V. All rights reserved.

10aChlorophyll-based photocatalyst10aMesoporous material10aMethyl orange10aPhotoreduction1 aJoshi, Meenal, M.1 aKamble, Sanjay, R.1 aLabhsetwar, Nitin, K.1 aParwate, D., V.1 aRayalu, Sadhana, S. uhttps://library.ncl.res.in/content/chlorophyll-based-photocatalysts-and-their-evaluations-methyl-orange-photoreduction-002206nas a2200265 4500008004100000022001400041245008800055210006900143260007300212300001000285490000800295520125800303653001501561653001301576653002201589653003101611653003301642100002201675700002601697700002601723700002501749700002301774700002401797856011901821 2009 eng d a0926-860X00aVisible light induced photoreduction of methyl orange by N-doped mesoporous titania0 aVisible light induced photoreduction of methyl orange by Ndoped  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcMAR a26-330 v3573 a

N-doped mesoporous titania was synthesized using templating method. Biopolymer chitosan was used as a template and also as a nitrogen source along with ammonium hydroxide. Three different types of N-doped mesoporous titania were synthesized by varying composition of chitosan and titania precursor. These photocatalysts were characterized using XRD, BET-SA, FTIR, UV-DRS, SEM-EDX and XPS analysis. The photocatalytic activity of mesoporous titania was studied by methyl orange (MO) photoreduction reaction. From the experimental results it was observed that the N-doped mesoporous titania (1:2) gives the highest photocatalytic reduction of MO as compared to N-doped mesoporous titania prepared with (1:1) and (1:3) stoichiometry. This could be due to the optimal level of `N' incorporation in the N-doped mesoporous titania (1:2). Photocatalysts reduce the MO dye into derivative of hydrazine. Photoactivity of N-doped mesoporous titania (1:2) is 1.0721 mg of MO reduced per g of TiO2 vis-a-vis 0.508 mg of MO reduced per g of TiO2 for Degussa P25 photocatalyst. The effect of various operating parameters like photocatalyst loading. initial concentration and intensity of light also has been studied. (C) 2009 Elsevier B.V. All rights reserved.

10abiopolymer10aChitosan10aMO photoreduction10aN-doped mesoporous titania10aVisible active photocatalyst1 aJoshi, Meenal, M.1 aLabhsetwar, Nitin, K.1 aMangrulkar, Priti, A.1 aTijare, Saumitra, N.1 aKamble, Sanjay, P.1 aRayalu, Sadhana, S. uhttps://library.ncl.res.in/content/visible-light-induced-photoreduction-methyl-orange-n-doped-mesoporous-titania-001875nas a2200193 4500008004100000022001400041245009600055210006900151260010400220300002300324520106100347100002601408700002301434700002201457700002501479700002601504700002401530856012701554 2012 eng d a1110-662X00aPhotocatalytic degradation of phenolics by N-doped mesoporous titania under solar radiation0 aPhotocatalytic degradation of phenolics by Ndoped mesoporous tit a410 PARK AVENUE, 15TH FLOOR, \#287 PMB, NEW YORK, NY 10022 USAbHINDAWI PUBLISHING CORPORATIONcMAR aArticle No. 7805623 a

In this study, nitrogen-doped mesoporous titania was synthesized by templating method using chitosan. This biopolymer chitosan plays the dual role of acting as a template (which imparts mesoporosity) and precursor for nitrogen. BET-SA, XRD, UV-DRS, SEM, and FTIR were used to characterize the photocatalyst. The doping of nitrogen into TiO2 lattice and its state was substantiated and measured by XPS. The photocatalytic activity of the prepared N-doped mesoporous titania for phenol and o-chlorophenol degradation was investigated under solar and artificial radiation. The rate of photocatalytic degradation was observed to be higher for o-chlorophenol than that of phenol. The photodegradation of o-chlorophenol was 98.62% and 72.2%, while in case of phenol, degradation to the tune of 69.25% and 30.58% was achieved in solar and artificial radiation. The effect of various operating parameters, namely, catalyst loading, pH, initial concentration and the effect of coexisting ions on the rate of photocatalytic degradation were studied in detail.

1 aMangrulkar, Priti, A.1 aKamble, Sanjay, P.1 aJoshi, Meenal, M.1 aMeshram, Jyotsna, S.1 aLabhsetwar, Nitin, K.1 aRayalu, Sadhana, S. uhttps://library.ncl.res.in/content/photocatalytic-degradation-phenolics-n-doped-mesoporous-titania-under-solar-radiation-0