Effect of polar and non-polar surfaces of ZnO nanostructures on photocatalytic properties

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• 作者：Jinghai Yang^a ; ^b ; ^{jhyang1@jlnu.edu.cn} ; Jian Wang^a ; ^b ; Xiuyan Li^a ; ^b ; Jihui Lang^a ; ^b ; Fuzhu Liu^a ; ^b ; Lili Yang^a ; ^b ; Hongju Zhai^a ; ^b ; Ming Gao^a ; ^b ; Xiaoting Zhao^a ; ^b
• 关键词：ZnO ; Expose surfaces ; Oxygen vacancies ; Hexagonal nanoplatform ; Nanohamburger ; Photocatalysis
• 刊名：Journal of Alloys and Compounds
• 出版年：2012
• 期刊代码：45_09258388
• 类别：ms
• 出版时间：5 July, 2012
• 卷：528
• 期：Complete
• 页码：28-33
• 文件大小：1068 K

摘要

Large-scale arrayed ZnO nanocrystals with two different expose surfaces, including ZnO hexagonal nanoplatforms with the major expose plane of (0 0 0 1) and hamburger-like samples with the nonpolar planes of {} mainly exposed, were successfully fabricated by a simple hydrothermal method. Mechanisms for compare the photocatalytic activity of two typical ZnO nanostructures were systematic explained as the key point in the paper. Compared with the hamburger-like ZnO nanostructures, the ZnO with hexagonal platform-like morphology exhibited improved ability on the photocatalytic degradation of Rhodamine B (RhB) in aqueous solution under UV radiation. The relative higher photocatalytic activity of the ZnO hexagonal nanoplatforms was attributed to the exposed polar surfaces and the content of oxygen vacancy on the nanostructures surface. The Zn-terminated (0 0 0 1) polar face and the surface defects are facile to adsorb O^{2鈭?/sup> and OH鈭?/sup> ions, resulting in a greater production rate of O2鈭?/sup> and OH鈭?/sup>, hence promoting the photocatalysis reaction.}