摘要
TiO2(锐钛矿)的禁带宽度限制了其光诱导特性的广泛应用,非金属元素掺杂为TiO2在可见光辐射环境下的应用提供了新的机会。详细介绍了非金属元素(N、C、S、F)掺杂TiO2的制备方法和可见光催化活性研究的最新进展,讨论了制备工艺与掺杂TiO2可见光催化活性的关系,深入分析了非金属元素对TiO2可见光催化活性的诱导机理。制备工艺显著影响了掺杂元素的化学态和含量,从而决定了掺杂TiO2带隙中局域态的特征。带隙中局域态特征正是影响掺杂TiO2可见光催化活性的关键因素。文章也对未来的研究方向进行了展望。
The widespread application of TiO2 has been cumbered with its wide band gap （3.2eV for anatase）. Doping with nonmetals （N, C, S, F） provides a promising opportunity for the application of TiO2 under visible light （vis-） irradiation. This paper reviews the up-to-date developments of the fabrication techniques and vis- photocatalytic activity of TiO2 doped with nonmetals. The vis-photocatalytic mechanisms due to doping with nonmetals are thoroughly discussed. The fabrication techniques remarkably influence the chemical states and contents of nonmetals in doped TiO2, consequently determine the characteristics of localized states within the band gap,which dominate to some extent vis-photocatalytic activities of doped TiO2. Several attractive topics on TiO2 doped with nonmetals are also presented for the research in the near future.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2008年第1期1-5,共5页
Journal of Functional Materials
关键词
二氧化钛
非金属元素
掺杂
可见光
光催化活性
titanium dioxide
nonmetal
doping
visible light
photocatalytic activity
