Understanding the mechanism of enhanced charge separation and visible light photocatalytic activity of modified wurtzite ZnO with nanoclusters of ZnS and graphene oxide: from a hybrid density functional study

2017 ◽  
Vol 41 (16) ◽  
pp. 8140-8155 ◽  
Author(s):  
Francis Opoku ◽  
Krishna Kuben Govender ◽  
Cornelia Gertina Catharina Elizabeth van Sittert ◽  
Penny Poomani Govender
Keyword(s):  
Photocatalytic Activity ◽  
Graphene Oxide ◽  
Visible Light ◽  
Charge Separation ◽  
Driving Force ◽  
Density Functional ◽  
Functional Study ◽  
Splitting Water ◽  
Hybrid Density Functional ◽  
Visible Light Photocatalytic

A hybrid ternary ZnS/GO/ZnO(001) system achieved enough driving force for splitting water into H2 gas.

A hybrid density functional study on the visible light photocatalytic activity of (Mo,Cr)–N codoped KNbO3

2015 ◽  
Vol 17 (43) ◽  
pp. 28743-28753 ◽  
Author(s):  
Guangzhao Wang ◽  
Hong Chen ◽  
Yang Li ◽  
Anlong Kuang ◽  
Hongkuan Yuan ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Density Functional ◽  
Photocatalytic Performance ◽  
Functional Study ◽  
Redox Level ◽  
Hybrid Density Functional ◽  
Decomposition Of Water ◽  
Visible Light Photocatalytic

To improve the photocatalytic performance of KNbO3 for the decomposition of water into hydrogen and oxygen, the electronic structure of KNbO3 should be modified to have a suitable bandgap with band edge positions straddling the water redox level so as to sufficiently absorb visible light.

One-step synthesis of Bi2WO6/Bi2O3 loaded reduced graphene oxide multicomponent composite with enhanced visible-light photocatalytic activity

RSC Advances ◽  
2015 ◽  
Vol 5 (84) ◽  
pp. 68646-68654 ◽  
Author(s):  
Shuang Zhong ◽  
Fengjun Zhang ◽  
Wei Lu ◽  
Tianye Wang ◽  
Liyuan Qu
Keyword(s):  
Photocatalytic Activity ◽  
Graphene Oxide ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Charge Separation ◽  
Schematic Diagram ◽  
Reduced Graphene ◽  
One Step ◽  
Multicomponent Composite ◽  
Visible Light Photocatalytic

Schematic diagram of charge separation in visible-light irradiation and the energy band mechanism of enhanced photocatalytic activity of BWO@R.

Zn1-xGaxO1-yNy – Graphene oxide nanocomposite for enhanced visible – Light photocatalytic activity

2019 ◽  
Vol 165 ◽  
pp. 249-255 ◽  
Author(s):  
R. Janani ◽  
Sumithra Sivadas Menon ◽  
Gopalkrishna Bhalerao ◽  
Bhavana Gupta ◽  
Shubra Singh
Keyword(s):  
Photocatalytic Activity ◽  
Graphene Oxide ◽  
Visible Light ◽  
Visible Light Photocatalytic Activity ◽  
Visible Light Photocatalytic

Enhancing visible light photocatalytic activity of bismuth vanadate with the loading of zinc oxide

2019 ◽  
Vol 12 (01) ◽  
pp. 1850110 ◽  
Author(s):  
Mengjun Liang ◽  
Lu Chen ◽  
Zhiyuan Yang ◽  
Zhen Zeng ◽  
Shuijin Yang
Keyword(s):  
Zinc Oxide ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Specific Surface ◽  
Visible Light Irradiation ◽  
Charge Separation ◽  
Facile Hydrothermal Method ◽  
Excellent Photocatalytic Activity ◽  
Efficient Charge ◽  
Visible Light Photocatalytic

ZnO/Bi4V2O[Formula: see text] nanocomposites were prepared via a facile hydrothermal method by loading different amounts of ZnO onto the surface of Bi4V2O[Formula: see text]. The resulting ZnO/Bi4V2O[Formula: see text] composites showed excellent photocatalytic activity than that of pure ZnO under visible light irradiation. When the ratio of ZnO to Bi4V2O[Formula: see text] was 1:1 (ZB2), the photocatalytic activity was best, which could degrade RhB almost completely within 30[Formula: see text]min. The enhanced photocatalytic activity of ZnO/Bi4V2O[Formula: see text] composites could be mainly ascribed to the efficient charge separation and the increased specific surface area. Based on the experimental and bandgap calculations, a possible photocatalytic mechanism was proposed.

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