Mesoporous titania

Bare CuOx-supported nanostructures showed some activity in H 2 production from methanol-water mixture under UV-visible irradiation [180]. Ni is also used as a dopant, and small amounts (1 wt.%) of this element in mesoporous titania guarantee good activity in water-methanol mixtures under UV-visible light [181]. Indium-tantalum oxide Ni-doped materials also provided photocatalysts with promising efficiencies for direct water splitting [182]. TiOz nanotubes doped with Ir and Co nanopartides were effective for visible light water splitting even in the absence of... 

Ao, Y., Xu, J., Fu, D., and Yuan, C. (2009) Synthesis of C,N, S-tridoped mesoporous titania with enhanced visible light-induced photocatalytic activity. Microporous and Mesoporous Materials, 122 (1—3), 1-6. 

Liu, G., Chen, Z., Dong, C., Zhao, Y., H, F Lu, G.Q., and Cheng, H.M. (2006) Visible light photocatalyst iodine-doped mesoporous titania with a bicrystalline framework. Journal of Physical Chemistry B, 110 (42), 20823-20828. 

Shamaila, S., Sajjad, A.K.L., Chen, F., and Zhang, J. (2010) Study on highly visible light active Bi203 loaded ordered mesoporous titania. Applied Catalysis B Environmental, 94 (3—4), 272—280. 

Chen, L. Yao, B. Cao, Y. Fan, K. 2007. Synthesis of well-ordered mesoporous titania with tunable phase content and high photoactivity. J. Phys. Chem. C 111 11849-11853. 

Crepaldi, E. L. Soler-Illia, G Grosso, D. Cagnol, F. Ribot, F. Sanchez, C. 2003. Controlled formation of highly organized mesoporous titania thin films From... 

Lancelle-Beltran, E. Prene, P Boscher, C. Belleville, R Buvat, P Lambert, S. Guillet, F. Boissiere, C. Grosso, D. Sanchez, C. 2006. Nanostructured hybrid solar cells based on self-assembled mesoporous titania thin films. Chem. Mater. 18 6152-6156. 

Ngamsinlapasathian, S. Pavasupree, S. Suzuki, Y. Yoshikawa, S. 2006. Dye-sensitized solar cell made of mesoporous titania by surfactant-assisted templating method. Solar Energy Mater. Solar Cells 90 3187-3192. 

Table 107 Properties and CO conversion rates as a function of temperature over Au catalysts in combination with mesoporous titania using a feed containing 4.494%CO and a steam partial pressure of 31.1 kPa. The catalyst volume was 0.5 cm3 and the space velocity was 4000 1C1 492...

Au/Ti02 Deposition precipitation 133 onto mesoporous titania 9.0 4.1 17 42 55... 

Au/Ti02 Deposition precipitation 134 onto mesoporous titania 8.0 6.2 43 80 86... 

When these ID nanocrystals are deposited on a surface, typically a random direction exists for the elongating axis of each ID nanocrystal. However, if the preparation method leads to an alignment of the elongating axis in one single direction, e.g. when an ordered array is present, quasi-2E) nanostructures are present. This class of nanostructured Titania thin film may be extended to include also ordered mesoporous Titania membranes, e.g. when the pores are aligned in one single direction. 

S. H. Overbury, L. Ortiz-Soto, H. G. Zhu, B. Lee, M. D. Amiridis, and S. Dai, Comparison of Au catalysts supported on mesoporous titania and silica Investigation of Au particle size effects and metal-support interactions, Catal. Lett. 95(3-4), 99-106 (2004). 

At the irradiation of the mesoporous Ti02 samples, dispersed in a water-alcohol mixture (typically containing 5 vol. % of H20 and 95 vol. % of C2H5OH) without addition of any metal cations, we did not observe any molecular hydrogen evolution (Tables 2, 3). Suspension of the mesoporous titania becomes grey-blue in... 

Irradiation of mixtures containing the mesoporous titania and metal cations Mz+ (Mz+ = Ni2+, Co2+, Cu2+, Fe2+, Ag+, Pb2+), induces darkening of titania suspension and accumulation of molecular hydrogen in the reactor volume (with the exception of systems, containing Pb2+). In the dark, we did not register any chemical reaction in such solutions. We supposed that samples darkening were induced by the photodeposition of the metals M° onto the surface of Ti02 crystallites [28, 31],... 

Table 3 summarizes the values of FI2 quantum yield (y) in systems, containing 0.5 mas. % of Ni2+ (per Ti02 mass) and mesoporous titania. The table shows that our metal-semiconductor composites can catalyze hydrogen evolution with substantial quantum yields, their photocatalytic activity being much more... 

Sreethawong, T., Y. Suzuki and S. Yoshikawa (2006). Platinum-loaded mesoporous titania by single-step sol-gel process with surfactant template Photocatalytic activity for hydrogen evolution. Comptes Rendus Chimie, 9(2), 307-314. 

Synthesis of Mesoporous Titania aqueous solution of an alkylamine and alcohol of titanium butoxide was mixed under magnetic stirring and aged at a certain temperature. A yellowish powder was obtained. 

The mesoporous titania was synthesized by oxidation of titanium carbide by 5 M nitric acid. The resultant particles were ca. 100 nm in size and have 6 nm pores. According to XRD analysis, the titania network was made of anatase crystallites with mean size of ca. 3 nm. Mesoporous silica particles ca. 1 pm in size) were... 

Ionic surfactants were used initially in the synthesis of mesoporous titania because their amphiphilic nature provides well organized micelles around which the titania... 

Coakley K. M. and McGehee M. D. (2003), Photovoltaic cells made from conjugated polymers infiltrated into mesoporous titania , Appl. Phys. Lett. 83, 3380-3382. 

R. Hutter, D. C. M. Dutoit, T. Mallat, M. Schneider, A. Baiker, Novel mesoporous titania-silica aerogels highly active for the selective epoxidation of cyclic olefins, Chem. Commun. (1995) 163. 

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