Yu Cheng, Yu Xiang-Xiang, Zheng Ding-Shan, Yin Hong
School of Geography Science and Geomatics Engineering, Su Zhou University of Science and Technology, No.99 Xuefu Road, SuZhou 215009, People's Republic of China.
School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou 434023, People's Republic of China.
Nanotechnology. 2021 Mar 26;32(13):135703. doi: 10.1088/1361-6528/abd1ab.
In this paper, two novel nanostructures with ZnO nanowire and nanosheet arrays vertically growing on the FTO and Al foil have been synthesized by a hydrothermal method, which exhibit both the piezoelectric and photocatalytic properties. These nanostructures have typical wurtzite structures based on the XRD results. From the SEM results, the average diameter and length of nanowire have been measured to be about 150 nm and 4.5 μm, the thickness of ZnO nanosheet is about 50 nm and the width is about 5 μm. In the photocatalytic test, the photodegradation of RhB under 365 nm illumination for nanowire and nanosheet is about 25% and 37% in 80 min reaction. With stirring, the degradation rate is increased to 61% and 85%. Finally, the photocurrent test and finite element method were used to analyze the piezo-photodegradation mechanism.
在本文中，通过水热法合成了两种新型纳米结构，其中ZnO纳米线和纳米片阵列垂直生长在FTO和铝箔上，它们同时展现出压电和光催化性能。基于XRD结果，这些纳米结构具有典型的纤锌矿结构。从SEM结果可知，纳米线的平均直径和长度分别测量为约150 nm和4.5μm，ZnO纳米片的厚度约为50 nm，宽度约为5μm。在光催化测试中，纳米线和纳米片在365 nm光照下对RhB的光降解率在80分钟反应内分别约为25%和37%。在搅拌的情况下，降解率提高到61%和85%。最后，采用光电流测试和有限元方法分析了压电光降解机理。
