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论文类型：期刊论文

发表时间：2009-03-01

发表刊物：PROGRESS IN CHEMISTRY

收录刊物：SCIE、PKU、ISTIC

卷号：21

期号：2-3

页面范围：406-419

ISSN号：1005-281X

关键字：heterojunction; energy bands; mechanism of photogenerated charge seperation; photocatalysis

摘要：Nano-heterojunctions, which integrate the advantages of nano-materials and heterojunctions, have attracted wide interests in many areas. In environmental pollution controlling area, nano-heterojunctions possess the potential application, because they can overcome the two obstacles of TiO(2) photocatalyst: the dissatisfactory quantum efficiency and the neglectable utilization of visible light. This review introduces the basic mechanism of nanoheterojunction related to environmental pollution controlling, including the driving force of inner electric field to photogenerated charge separation and its active region, the effect of illumination, the thickness of top semiconductor, energy bands and structure type on photogenerated-charge-separation mode of heterojunction. The progress of pn junction, nn junction, Schottky junction, and heterojunctions of semiconductor with carbon materials in environmental pollution controlling is summarized. The future developing perspectives are also presented.