Visible-Light-Induced Dye Degradation over Copper-Modified Reduced Graphene Oxide

2011 ◽  
Vol 17 (8) ◽  
pp. 2428-2434 ◽  
Author(s):  
Zhigang Xiong ◽  
Li Li Zhang ◽  
Xiu Song Zhao
Keyword(s):  
Graphene Oxide ◽  
Visible Light ◽  
Reduced Graphene Oxide ◽  
Dye Degradation ◽  
Reduced Graphene

Indium-substituted ZnO/reduced graphene oxide nanocomposites: Solvothermal synthesis and enhanced visible-light-driven photocatalytic activity

2014 ◽  
Vol 07 (02) ◽  
pp. 1450013 ◽  
Author(s):  
Jie Zhu ◽  
Wanhong He ◽  
Lu Zhang ◽  
Xu Xiang ◽  
Zhiwei Li
Keyword(s):  
Photocatalytic Activity ◽  
Graphene Oxide ◽  
Visible Light ◽  
Reduced Graphene Oxide ◽  
Dye Degradation ◽  
Shielding Effect ◽  
Bandgap Engineering ◽  
Composite Photocatalyst ◽  
Reduced Graphene ◽  
Visible Light Driven

A new protocol was developed to obtain a composite photocatalyst by incorporating indium to ZnO and subsequently assembling it with reduced graphene oxide (RGO) sheets. The incorporation of indium led to lattice distortion of ZnO and introduction of defect levels. The hybridization with RGO could improve the electron transport and extend the lifetime of photo-generated carriers, leading to enhanced activity for dye degradation driven by visible light. The photocatalytic activity appeared to be dependent on the relative quantity of RGO. The optimized quantity resulted in the highest activity due to the dual role of electron shuttle and "shielding effect" of RGO. In addition, the composite photocatalyst exhibited excellent repeatable use performance, suggestive of its high stability. This study proposed a promising strategy to construct photocatalysts by rational bandgap engineering and tunable composite technology.

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