ZnO nanorod array/reduced graphene oxide substrate with enhanced performance in photocatalytic degradation

Micro & nano letters

article

Xiaoyun Ye¹  Zhaopeng Wang¹  Zhengdong Li¹  Wei Li¹  Qianting Wang¹ 

[1] School of Materials Science and Engineering, Fujian University of Technology;Fujian Provincial Key Laboratory of Advanced Materials Processing and Application

关键词: wide band gap semiconductors;    nanofabrication;    nanocomposites;    titanium compounds;    II-VI semiconductors;    X-ray diffraction;    graphene;    nanorods;    zinc compounds;    photocatalysis;    coating techniques;    photocatalytic degradation;    perpendicular arrays;    zinc oxide nanorod array/reduced graphene oxide substrate;    zinc oxide nanorod array/reduced graphene oxide composite coating;    seed layer-growth;    aqueous solution reaction;    simple water bath method;    methylene blue;    UV radiation;    photo-generated electron-hole pairs;    electron sinks;    green preparation;    photocatalysts;    ZnO-CO;   

DOI  :  10.1049/mnl.2018.5446

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

A novel ZnO nanorod array/reduced graphene oxide (ZnO array/rGO) composite coating was synthesised via the combination of seed layers-growth and aqueous solution reaction for the formation of ZnO nanorod arrays, which was further combined with rGO using a simple water bath method. The results revealed that perpendicular arrays with hexagonal planes were successfully fabricated. The size and density of the arrays could be optimised by adjusting the reactant concentrations. The influence of the rGO fraction in the ZnO array/rGO composites on the photocatalytic degradation of the methylene blue under UV radiation was investigated. It was found that the photocatalytic performance could be significantly improved by adding rGO. The enhanced photocatalytic activities were attributed to the interactions between ZnO nanorod arrays and rGO nanosheets and subsequently effective separation of photo-generated electron-hole pairs via rGO as electron sinks. The ZnO array/rGO composites presented advantages including facile and green preparation, long photo-electron lifetime, easy particle agglomeration and recovery, and therefore is expected to be an ideal photocatalysts for the future utilisation.

【 授权许可】

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