期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 509, 期 6, 页码 2672-2678出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2010.11.154
关键词
Photocatalysis; SERS sensor; Porous composites; TiO2 aerogel; Noble metal particles
资金
- CNCSIS-UEFISCSU [PN II-RU_TE 81/2010]
Porous nanocomposites based on TiO2 aerogels and Au and, respectively, Ag particles were synthesized and their dual functionality to decontaminate water, via photocatalysis, and to detect low concentrations of pollutants from water, via SERS technique, was evaluated using model pollutants. The apparent photodegradation rate constants of a standard pollutant molecule revealed a considerable improvement of the composites photocatalytic performances (even better than one order of magnitude) in comparison with the commercial product Degussa P25. The essential role of the contact between TiO2 and Au nanoparticles was demonstrated and the potential of all synthesized porous composites for photocatalytic experiments with visible light was pointed out. The lowest concentrations of contaminants adsorbed on the noble metal particles detectable by SEAS were found to depend on the composite and pollutant species type and were determined to be between 10(-3) and 5 x 10(-6) M, and 10(-8) and 10(-10) M for off and under resonant excitation, respectively. The morphological (BET, pore size distribution, TEM) and structural (Raman, XRD, diffuse reflectance) particularities of the obtained porous composites were also discussed. (C) 2010 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