Facile synthesis of Au/ZnO nanoparticles and their enhanced photocatalytic activity for hydroxylation of benzene

Bulletin of materials science

Hai Ming¹  Haitao Li¹  Jingjing Gong¹  Hui Huang¹  Jie Wei²  Yang Liu¹  Dongtian Wang²  Hang Yu¹  Keming Pan¹  Zhenhui Kang¹ 

[1] Institute of Functional Nano and Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, Soochow University, Suzhou 215123, China$$Institute of Functional Nano and Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, Soochow University, Suzhou 215123, ChinaInstitute of Functional Nano and Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, Soochow University, Suzhou 215123, China$$;Department of Chemical and Biological Engineering, Suzhou University of Science and Technology, Suzhou 215011, China$$Department of Chemical and Biological Engineering, Suzhou University of Science and Technology, Suzhou 215011, ChinaDepartment of Chemical and Biological Engineering, Suzhou University of Science and Technology, Suzhou 215011, China$$

关键词: Zinc oxide;    gold nanoparticles;    nanocomposites;    photocatalysis;    visible light.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Au/ZnO nanocomposites have been prepared by a simple chemical method. For the first time, the nanocomposites were directly used as photocatalysts for hydroxylation of aromatic hydrocarbons under UV and visible light irradiation. The results show that the as-prepared photocatalysts display high photocatalytic activity for UV and visible catalytic hydroxylation of benzene. Without the assistance of any solvent or additive, high selectivity and high conversion efficiency were still obtained. Different photocatalytic mechanisms were proposed depending on whether excitation happens on ZnO semiconductor or on the surface plasmon band of Au. The former is Au nanoparticles act as electron buffer due to irradiation by UV light and ZnO nanoparticles as reactive sites for hydroxylation of benzene, the latter is that Au nanoparticles act as light harvesters and inject electrons into ZnO conduction band and as photocatalytic sites under visible light irradiation.

【 授权许可】

Unknown