发光学报, 2017, 38 (7): 936, 网络出版: 2017-07-05   

ZnO/Cu2O异质结纳米阵列制备及光催化性能

Preparation and Photocatalytic Property of ZnO/Cu2O Heterostructured Nanorod Arrays
作者单位
1 常州大学 怀德学院, 江苏 常州 213016
2 江苏理工学院 材料工程学院, 江苏 常州 213001
3 常州大学 数理学院, 江苏 常州 213164
摘要
利用湿化学法在FTO玻璃基底上制备了高度规整的ZnO纳米棒阵列(ZnO NRAs), 以此为衬底, 采用磁控溅射法在ZnO NRAs表面沉积Cu2O薄膜。分别用X射线衍射仪、X射线光电子能谱、扫描电镜、光致光谱、紫外可见分光光度计和电化学工作站对样品的物相、形貌、吸收光谱、光电性能进行了表征, 用甲基橙(MO)模拟有机物废水研究复合材料的光催化性能。结果表明: ZnO纳米棒为六方纤锌矿结构, 其直径约为80~100 nm, 长约2~3 μm, 棒间距约100~120 nm。立方晶系的Cu2O颗粒直径约为100~300 nm, 形成致密膜层并紧密覆盖在ZnO NRAs表面上, 构成ZnO/Cu2O异质结纳米阵列(ZnO/Cu2O HNRAs)结构。与纯ZnO NRAs和Cu2O相比, ZnO/Cu2O HNRAs在可见光范围内的吸收显著增强, 吸收波长向可见光方向偏移。ZnO/Cu2O HNRAs的载流子传递界面的电荷转移速度快, 有效促进了光生电子和空穴的分离。在紫外-可见光照射65 min后, ZnO/Cu2O HNRAs的降解效率为94%, 分别是纯ZnO NRAs和Cu2O的18倍和1.7倍。
Abstract
ZnO nanorod arrays (ZnO NRAs) on FTO-glass substrates were prepared by chemical method, then Cu2O film was deposited on ZnO NRAs surface by using magnetron sputtering method. The crystal phase, morphology, UV-Vis absorbance spectra and photoelectric property were characterized by X-ray diffraction, X-ray photoelectron spectroscope, scanning electron microscopy, photoluminescence spectroscopy, UV-Vis spectrophotometer and electrochemical workstation, respectively. The photocatalytic activity was evaluated by the photocatalytic degradation of methyl orange (MO) under UV-Vis light irradiation. The results show that ZnO NRAs are wurtzite structure phase with diameter of 80-100 nm, length of 2-3 μm, and rod interval distance of 100-120 nm. Cu2O particles are the cubic phase with grain diameter of 100-300 nm and form a dense membrane layer on ZnO NRAs, which constitutes ZnO/Cu2O heterojunction nanorod arrays(ZnO/Cu2O HNRAs) structure. Compared with pure ZnO NRAs and Cu2O film, the absorption intensity in the visible region of ZnO/Cu2O HNRAs is significantly enhanced and the absorption wavelength redshifts. The charge transfer speed on the carrier transmission interface of ZnO/Cu2O HNRAs is faster, contributing to the separation of photoelectrons from hole. Irradiated under UV-Vis light for 65 min, the MO degradation efficiency of ZnO/Cu2O HNRAs is 94%, 18 times than that of pure ZnO NRAs and 1.7 times than that of pure Cu2O film.

何祖明, 夏咏梅, 唐斌, 江兴方, 黄正逸. ZnO/Cu2O异质结纳米阵列制备及光催化性能[J]. 发光学报, 2017, 38(7): 936. HE Zu-ming, XIA Yong-mei, TANG Bin, JIANG Xing-fang, HUANG Zheng-yi. Preparation and Photocatalytic Property of ZnO/Cu2O Heterostructured Nanorod Arrays[J]. Chinese Journal of Luminescence, 2017, 38(7): 936.

本文已被 3 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!