Indexed by:期刊论文

Date of Publication:2009-03-01

Journal:PROGRESS IN CHEMISTRY

Included Journals:SCIE、PKU、ISTIC

Volume:21

Issue:2-3

Page Number:406-419

ISSN No.:1005-281X

Key Words:heterojunction; energy bands; mechanism of photogenerated charge seperation; photocatalysis

Abstract: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.