Photocatalytic composite

Guemter, S. et al., Photocatalytic composite element for cleavage of hydrogen containing compounds, especially, for hydrocarbon decomposition and wastewater treatment, German Patent No. DE 10210465,2003. 

Liu et al. [157] studied an efficient hybrid adsorbent/photocatalytic composite (Ti02/zeolite) for the H2S removal and SO2 capture by coating Ti02 on the surface of cheap natural zeolite with an ultrasonic-calcination way. The Ti02/zeolite... 

Santala E, Kemell M, Leskela M, Ritala M (2009) The preparation of reusable magnetic and photocatalytic composite nanoflbers by electrospinning and atomic layer deposition. Nanotechnology 20(3) 035602. doi 10.1088/0957-4484/20/3/035602... 

Pozzo RL, Brandi RJ, Giombi JL, Baltanas MA, Cassano AE (2005) Design of fluidized bed photoreactors optical properties of photocatalytic composites of titania CVD-coated onto quartz sand. Chem Eng Sci 60 2785-2794... 

Table 1 Surface area, band gap energies and photocatalytic activities for H2 evolution from an electrolsde solution over single CdS and CdS-based composite photocatalysts.

The photocatalytic experiments were performed in a horizontal quartz tube which it have TiOi. Illumination was provided by 500 W mercury lamps, located above the horizontal quartz tube. The reactant was 0.1% (v/v) ethylene in air. In case of Photo-Catalyst test, reactor effluent samples were taken at 30 min intervals and analyzed by GC. The composition of hydrocarbons in the feed and product stream was analyzed by a Shimadzu GC14B (VZIO) gas chromatograph equipped with a flame ionization detector. In all case, steady state was reached within 3 h. 

Rajeshwar and co-workers performed photocatalytic underpotential deposition of Cd and Pb onto the surface of Se-modified Ti02 particles to prepare CdSe/Ti02 and PbSe/Ti02 composites [97, 98]. The Se-modified Ti02 particles were prepared themselves by UV illumination of titania particles in a Se(fV)-containing aqueous solution. The photocatalytic UPD of Cd and Pb on the bare Ti02 surface was found... 

Chenthamarakshan CR, Ming Y, Rajeshwar K (2000) Underpotential photocatalytic deposition A new preparative route to composite semiconductors. Chem Mater 12 3538-3540... 

Fig.6. Photocatalytic cleavage of H2S over a platinized composite sulfide semiconductor particle with a heterojunction.

Figures 11.8-11.10 and Tables 11.8-11.10 explain the sono-photochemical degradation of phenol under sonicated and normal conditions and in the presence of photocatalyst (n-BuO Ti with and without Cu-Dy, Mn-Dy and Co-Dy composites respectively. These Figs. 11.8-11.10 show the percentage degradation of phenol during a period of 2 h through an interval of 30 min under sonicated, photocatalytic, sonophotocatalytic and crystal induced sono-photo-catalytic conditions.

The removal of H2S in the gas phase was found to proceed with good results when composites of Ti02 and SiMgO materials were employed, owing to the synergic effect of the photocatalytic activity of the former material and the adsorptive properties of the latter for S02 [134]. 

Testino, A., Bellobono, I.R., Buscaglia, V., Canevali, C., D Arienzo, M., Polizzi, S., Scotti, R., and Morazzoni, F. (2007) Optimizing the photocatalytic properties of hydrothermal Ti02 by the control of phase composition and particle morphology. A systematic approacli./ournid of the American Chemical Society, 129 (12), 3564—3575. 

Zhou, Y., Krumeich, F., Heel, A., and Patzke, G.R. (2010) One-step hydrothermal coating approach to photocatalytically active oxide composites. Dalton Transactions, 39 (26), 6043-6048. 

Li, L. and Yan, B. (2009) BiV04/Bi203 submicrometer sphere composite microstructure and photocatalytic activityunder visihle-light irradiation. Journal of Alloys and Compounds, 476 (1—2), 624—628. 

Wu, P., Xie, R., Imlay, J.A., and Shang, J.K. (2009) Visible-light-induced photocatalytic inactivation of bacteria by composite photocatalysts of palladium oxide and nitrogen-doped titanium oxide. Applied Catalysis B Environmental,... 

Han, J.K., Choi, S.M. and Lee, G.H. (2007) Synthesis and photocatalytic activity of nanocrystalline Ti02-SrO composite powders under visible lightirradiation. Materials Letters, 61, 3798-3801. 

Modestov A., Glezer V., Maryasin I., Lev O. Photocatalytic degradation of chlorinated phenoxyacetic acids by a new buoyant titania - exfoliated graphite composite photocatalyst. J Phys Chem B 1997 101 4623-9. 

Homogeneous, nanosized, copper-loaded anatase titania was synthesized by an improved sol-gel method [197], These titania composite photocatalysts were applied to the photoreduction of carbon dioxide to evaluate their photocatalytic performance. Methanol was found to be the primary hydrocarbon product [198], Under calcination conditions, small copper particles are well dispersed on the surface of anatase titania. According to XAS and XPS analysis, the oxidation state of Cu(I) was suggested to be the active species for C02 photoreduction [199], Higher copper dispersion and smaller copper particles on the titania surface are responsible for a great improvement in the performance of C02 photoreduction. 

K. Vinodgopal, I. Bedja, P.V. Kamat, Nanostructured semiconductor films for photocatalysis. Photoelectrochemical behavior of Sn02/Ti02 composite systems and its role in photocatalytic degradation of a textile azo dye, Chem. Mater. 8 (1996) 2180-2187. 

Y. Inoue, Photocatalytic activity of the Ru02-dispersed composite p-block metal oxide LiInGe04 with d10-d10 configuration for water decomposition,... 

Tu, X., et ah, One-pot synthesis, characterization, and enhanced photocatalytic activity of a BiOBr-graphene composite. Chemistry - A European Journal, 2012.18(45) p. 14359-14366. 

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