Photoactivity enhancement of the Cd_xZn_1?xS nanoparticles by immobilizing on the graphene under visible light irradiation

详细信息    查看全文

• 作者：Jian Wang ; Pengju Yang ; Jianghong Zhao ; Zhenping Zhu
• 关键词：CdxZn1&minus ; xS ; Graphene ; Photocatalysis ; Hydrogen production
• 刊名：Applied Surface Science
• 出版年：2013
• 出版时间：1 October, 2013
• 年：2013
• 卷：282
• 期：Complete
• 页码：930-936
• 全文大小：2334 K

文摘

The photocatalytic activity of semiconductor is strongly dependent on the efficient separation of photogenerated electron-hole pairs. In the present work, the graphene-immobilized Cd_xZn_1?xS nanoparticles with a uniform and small diameter have been prepared by one-step solvothermal route. After dispersing Cd_xZn_1?xS on the graphene surface well, the composites of Cd_xZn_1?xS and graphenes show better photocatalytic activity than pure Cd_xZn_1?xS nanoparticles. And the issue of photocorrosion, a disadvantage of Cd_xZn_1?xS photocatalysts, has also been solved partly. The mechanisms on enhancement of photocatalytic activity were further investigated. Under visible light irradiation, photogenerated electrons of Cd_xZn_1?xS can be transferred into the graphene, and the electron and hole was effectively separated, leading to the photoactivity enhancement.