Enhanced Photocatalytic Activity of ZnO Microspheres via Hybridization with CuInSe2 and CuInS2 Nanocrystals

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• 作者：Fengyu Shen ; Wenxiu Que ; Yucheng He ; Yuan Yuan ; Xingtian Yin ; Gangfeng Wang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2012
• 出版时间：August 22, 2012
• 年：2012
• 卷：4
• 期：8
• 页码：4087-4092
• 全文大小：409K
• 年卷期：v.4,no.8(August 22, 2012)
• ISSN：1944-8252

文摘

ZnO microspheres sensitized by CuInSe₂ and CuInS₂ nanoparticles, which were synthesized by a solvothermal method and have a size about 20 and 3.5 nm, respectively, were used to a photodegradation of rhodamine B under an irradiation of mercury lamp. Results show that the photocatalytic activities of the ZnO/CuInSe₂ and the ZnO/CuInS₂ are much higher than that of the ZnO microspheres because of a formation of the heterojunction in two systems. It is also noted that the ZnO/CuInS₂ exhibits a higher photocatalytic activity than the ZnO/CuInSe₂, which is probably related to more suitable band gap to sunlight for CuInS₂ nanocrystals and the larger specific surface due to a small size. Particularly, the ZnO/CuInSe₂/CuInS₂ shows the highest photocatalytic activities in all measured photocatalysts, which should be attributed to the formation of double heterojunctions among ZnO, CuInSe₂, and CuInS₂.

Keywords:

ZnO; CuInSe₂; CuInS₂; Rhodamine B; heterojunction; photocatalytic activity