Defect engineering of ZnO nanoparticles by graphene oxide leading to enhanced visible light photocatalysis

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• 作者：Gulzar Ahmed^a ; Muddasir Hanif^b ; Lizhong Zhao^a ; Mozaffar Hussain^a ; Javid Khan^c ; Zhongwu Liu^a ; ^{zwliu@scut.edu.cn}
• 关键词：ZnO ; Graphene ; Composite ; Microwave synthesis ; Photo-catalysis ; Radicals
• 刊名：Journal of Molecular Catalysis A: Chemical
• 出版年：2016
• 出版时间：15 December 2016
• 年：2016
• 卷：425
• 期：Complete
• 页码：310-321
• 全文大小：4307 K
• 卷排序：425

文摘

Graphene oxide (GO) based hybrid photocatalyst ZnO/(Fe3O4@SiO2)/rGO (GZF) composites were prepared via microwave synthesis. The optical results show that the visible emission consists of violet, blue and green regions, attributed to the zinc interstitial, zinc vacancy and oxygen vacancy defects. The photocatalytic performance of GZF composites was found to be 3.6 times higher than ZnO nanoparticles. The improved catalysis properties are due to the lower defects, enhanced photo-excitation in the visible region, good adsorption and higher oxidation capability.