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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。
For a long time, titanium dioxide (TiO 2) has long been considered as a promising semiconductor material for the treatment of pollutants. However, its band gap in visible light larger, lower catalytic efficiency limits its use under visible light. At present, the most valuable research progress in the field is the introduction of other components in the TiO 2 structure to make the material have the capability of photocatalytically degrading pollutants under visible light. The main types of the materials include metal doping, non-metal doping and co-doping. The author summarizes the recent progress of these preparation methods to improve the photocatalytic efficiency of TiO 2 and its mechanism, aiming to provide a new direction for the further development of TiO 2 with high photocatalytic efficiency and its practical application in the future.