期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 169, 期 1-3, 页码 77-87出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2009.03.071
关键词
L-Cysteine; Doped TiO2 nanocrystals; Photocatalysis; NO; Removal
资金
- National Basic Research Program of China (973 program) [2007CB613301]
- National Science Foundation of China [20503009, 20777026]
- New Century Excellent Talents in University [NCET-07-0352]
- Key Project of Ministry of Education of China [108097]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
In this study, C-N-S-tridoped titanium dioxide (TiO2) nanocrystals were synthesized by using a facile hydrothermal method in the presence of a biomolecule L-cysteine. This biomolecule could not only serve as the common source for the carbon, sulfur and nitrogen tridoping, but also could control the final crystal phases and morphology. The resulting materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM). X-ray photoelectron spectroscopy (XPS), nitrogen adsorption and UV-vis diffuse reflectance spectroscopy. XPS analysis revealed that S was incorporated into the lattice of TiO2 through substituting oxygen atoms, IN might coexist in the forms of N-Ti-O and Ti-O-N in tridoped TiO2 and most C could form a mixed layer of carbonate species deposited on the surface of TiO2 nanoparticles. The photocatalytic activities of the samples were tested on the removal of NO at typical indoor air level in a flow system under simulated solar light irradiation. The tridoped TiO2 samples showed much higher removal efficiency than commercial P25 and the undoped counterpart photocatalyst. The enhanced visible light photocatalytic activity of C-N-S-tridoped TiO2 nanocrystals was explained on the basis of characterizations. The possible formation process of the monodispersed C-N-S-tridoped anatase TiO2 nanocrystals was also proposed. This study provides a new method to prepare visible light active TiO2 photocatalyst. (C) 2009 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