Optical and photocatalytic properties of nanocrystalline ZnO powders synthesized by a low-temperature hydrothermal method

被引：19
|
作者：
Zhou, Yang [1 ]
Xu, Linhua [1 ,2 ]
Wu, Zijun [1 ]
Li, Pei [1 ]
He, Jiaojiao [1 ]
机构：
[1] Nanjing Univ Informat Sci & Technol, Sch Phys & Optoelect Engn, Ningliu Rd 219, Nanjing 210044, Jiangsu, Peoples R China
[2] Nanjing Univ Informat Sci & Technol, Opt & Photon Technol Lab, Nanjing 210044, Jiangsu, Peoples R China
来源：
OPTIK | 2017年 / 130卷
关键词：
Nanocrystalline ZnO powders; Hydrothermal method; Photocatalytic activity; Optical bandgap; Photoluminescence; PHOTOLUMINESCENCE; NANOPARTICLES; FABRICATION; SENSOR;
D O I：
10.1016/j.ijleo.2016.10.119
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this work, nanocrystalline ZnO powders were prepared by a low-temperature hydrothermal method using zinc nitrate and hexamethylenetetramine (HMT) as the Zn and alkaline source, respectively. The influence of the concentration of HMT in the growth solutions on the structural, optical and photocatalytic properties of nanocrystalline ZnO powders was investigated. The results showed that the ZnO powders were composed of lots of ZnO nanoparticles; the different concentration of HMT had almost no influence on the crystalline structure of the ZnO particles. However, with the increase of HMT concentration, the size of the ZnO particles and the ultraviolet emission decreased gradually while the visible emissions gradually enhanced. The photocatalytic tests showed that all the samples exhibited good photocatalytic degradation performance for Rhodamine B (RhB). With the increase of HMT concentration, the photocatalytic activity of the ZnO powders was also enhanced. The enhanced photocatalytic activity was ascribed to the increase of the specific surface area and oxygen vacancies on the surface of the particles. (C) 2016 Elsevier GmbH. All rights reserved.
引用
收藏
页码：673 / 680
页数：8
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