期刊
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
卷 189, 期 2-3, 页码 258-263出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2007.02.010
关键词
titanium dioxide; silver; visible light; photocatalsysis
This paper presents a systematic study on two different preparation methods for titanium dioxide with silver. The silver can be incorporated by irradiating the reaction mixture during preparation to reduce silver ion to silver metal or by direct calcination of the sol-gel material to decompose silver nitrate to silver. Of the two methods, we found the latter produces a more effective photocatalytic material (6-50% improvement in catalytic efficiency), which is attributed to the fact that the silver is homogeneously dispersed throughout the material. The efficiency of the materials were examined using a Q-Sun solar simulator (visible light) and in Dublin summer sunlight (latitude 54 degrees N). In both cases, the addition of increasing amounts of silver, for both batches of samples, significantly increases the rate of degradation of a model dye, rhodamine 6G (R6G), increasing the rate of degradation from 0.06 min(-1) for TiO2 to 0.34 min(-1) for 5 mol% Ag-TiO2. This is attributed to the increasing visible absorption capacity due to the presence of silver nanoparticles. (c) 2007 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据