掺杂型TiO_2光催化研究的最新进展
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摘要
长期以来,二氧化钛(TiO_2)一直被认为是一种有前景处理污染物的半导体材料。但其在可见光下禁带宽度较大、催化效率较低等限制了其在可见光下的运用。目前该领域最具有价值的研究进展是在TiO_2结构中引入其他成分使该材料在可见光下具有光催化降解污染物的能力,其主要类型包括金属掺杂、非金属掺杂和共掺杂。笔者综述了这些制备方法提高TiO_2光催化效率的途径及机理的最新进展,旨在为今后进一步扩大高光催化效率TiO_2的开发以及实际应用提出新的方向。
Titanium dioxide(TiO_2)has been known as one of the most promising semiconductor materials for its ability of pollutants treatment.However,there are still many shortcomings that restrict its applications,such as inability of photocatalysis in visible light for its larger band gap and its lower photocatalytic efficiency.Nowadays,the most valuable research field is to introduce other elements to the structure of TiO_2,making it possible to photocatalyze pollutants in visible light.Metal doping,nonmetal doping and co-doping are used to realize the process.Many kinds of methods were summarized to improve the photocatalytic efficiency of TiO_2 and the related mechanism and the latest development was also discussed,so as to offer new applications for the development of TiO_2 with high efficiency.
Titanium dioxide(TiO_2)has been known as one of the most promising semiconductor materials for its ability of pollutants treatment.However,there are still many shortcomings that restrict its applications,such as inability of photocatalysis in visible light for its larger band gap and its lower photocatalytic efficiency.Nowadays,the most valuable research field is to introduce other elements to the structure of TiO_2,making it possible to photocatalyze pollutants in visible light.Metal doping,nonmetal doping and co-doping are used to realize the process.Many kinds of methods were summarized to improve the photocatalytic efficiency of TiO_2 and the related mechanism and the latest development was also discussed,so as to offer new applications for the development of TiO_2 with high efficiency.
引文
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[23]Low W,Boonamnuayvitaya V.[J].Journal of Environmental Management,2013,127(2):142-149.
[24]Qian Xufang,Fuku Kojirou,Kuwahara Yasutaka,et al.[J].Chemsuschem,2014,7(6):1528-1536.
[25]Ouafa Tahiri Alaoui,Alexandre Herissan,et al.[J].Photochemistry and Photobiology A,2012,242:34-43.
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[30]Wu N,Wang Y,Lei Y,et al.[J].Ceramics International,2014,40(1Part B):2017-2022.
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[33]张新亚,宋子健,周府治,等.氟氮共掺杂二氧化钛/还原氧化石墨稀复合光催化剂的制备及其可见光催化性能[J].硅酸盐学报,2015,43(7):919-925.
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