Photocatalytic decomposition of N2O on Ag-TiO2

被引：38
|
作者：
Koci, K. [1 ]
Krejcikova, S. [2 ]
Solcova, O. [2 ]
Obalova, L. [1 ]
机构：
[1] VSB Tech Univ Ostrava, Fac Met & Mat Engn, Ostrava 70833, Czech Republic
[2] Acad Sci Czech Republ, Inst Chem Proc Fundamentals, Vvi, CR-16502 Prague, Czech Republic
来源：
CATALYSIS TODAY | 2012年 / 191卷 / 01期
关键词：
N2O; Photocatalytic decomposition; Ag doping; TiO2; LOCAL STRUCTURES; CATALYSTS; IONS; REACTIVITIES; OXIDE; TIO2; N-2; REDUCTION; MONOXIDE; TITANIA;
D O I：
10.1016/j.cattod.2012.01.021
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Catalysts with various Ag loading (0.7-5.2 wt%) in the powder form were prepared by the sol-gel process controlled in the reverse micellar environment. X-ray diffraction (XRD), nitrogen adsorption measurement, UV-vis and elemental analysis were employed for characterization of catalysts. Effect of various silver loadings on photocatalytic activity of TiO2 catalysts in N2O photocatalytic decomposition was studied. Photocatalytic decomposition of N2O was performed in annular batch reactor illuminated with 8 W Hg lamp (254 nm wavelength). Reaction kinetic corresponds to first-order reaction rate which is in agreement with plausible reaction mechanisms. The highest N2O conversion of 77% after 24 h was reach over TiO2 modified by 3.4 wt% Ag. The Ag metal clusters could provoke a decrease in the electron-hole recombination rate. (c) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：134 / 137
页数：4
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