Interface-defect-mediated photocatalysis of mesocrystalline ZnO assembly synthesized in-situ via a template-free hydrothermal approach

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	Interface-defect-mediated photocatalysis of mesocrystalline ZnO assembly synthesized in-situ via a template-free hydrothermal approach
	Wang, Hui 1; Wang, Cuicui 1; Chen, Qifeng 1,2; Ren, Baosheng 1; Guan, Ruifang 1,2; Cao, Xiaofeng 3; Yang, Xiaopeng 1; Duan, Ran 4
刊名	APPLIED SURFACE SCIENCE
	2017-08-01
卷号	412 页码:517-528
关键词	Defects Interface Zno Mesocrystal Assembly Photocatalysis
英文摘要	Both architecture construction and defects engineering of photocatalysts are highly vital in the photocatalytic activity. We report herein that the interface-defect-mediated photocatalytic activity of pompon-like ZnO (P-ZnO) mesocrystal photocatalyst synthesized via an aqueous approach, in the presence of sodium citrate without any other organic templates. The microstructure and defects of the diverse ZnO photocatalysts were examined with various techniques. The results indicated that the P-ZnO assemblies were composed of mesocrystal nanosheets exposed high energy (002) facet with high crystallinity. More importantly, the defects located at the interfaces among the nanocrystals in ZnO mesocrystals played an important role in the photocatalytic activity than that of interstitial zinc vacancies in bulk, which was confirmed by photocatalytic degradation of organic pollutants, such as methylene blue (MB) and 2,4,6-trichlorophenol (2,4,6-TCP). The results showed that the P-ZnO exhibited higher photocatalytic activity than that of the nanosized ZnO (N-ZnO), which could be attributed to not only the unique mesocrystal structure and high energy (002) facet exposed, but also the defects located at interfaces among nanocrystals in ZnO mesocrystals. In addition, the formation mechanism of the P-ZnO was investigated via a time-dependent method. It was found that the formation of P-ZnO hierarchical architecture assembled with ZnO mesocrystals involved a nonclassical crystallization growth and Ostwald Ripening process. This study provides a perspective on the improvement in photocatalytic activity via adjusting the bulk and interface defects and construction of hierarchical architectures of semiconductors. (C) 2017 Elsevier B.V. All rights reserved.
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/38486]
专题	化学研究所_其它
作者单位	1.Univ Jinan, Sch Mat Sci & Engn, 336 Nanxinzhuang West Rd, Jinan 250022, Shandong, Peoples R China 2.Univ Jinan, Shandong Prov Key Lab Preparat & Measurement Bldg, 336 Nanxinzhuang West Rd, Jinan 250022, Shandong, Peoples R China 3.Chinese Acad Sci, Key Lab Photochem Convers & Optoelect Mat, TIPC, 29 Zhongguancun East Rd, Beijing 100190, Peoples R China 4.Chinese Acad Sci, Inst Chem, 2 Zhongguancun North First St, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Wang, Hui,Wang, Cuicui,Chen, Qifeng,et al. Interface-defect-mediated photocatalysis of mesocrystalline ZnO assembly synthesized in-situ via a template-free hydrothermal approach[J]. APPLIED SURFACE SCIENCE,2017,412:517-528.
APA	Wang, Hui.,Wang, Cuicui.,Chen, Qifeng.,Ren, Baosheng.,Guan, Ruifang.,...&Duan, Ran.(2017).Interface-defect-mediated photocatalysis of mesocrystalline ZnO assembly synthesized in-situ via a template-free hydrothermal approach.APPLIED SURFACE SCIENCE,412,517-528.
MLA	Wang, Hui,et al."Interface-defect-mediated photocatalysis of mesocrystalline ZnO assembly synthesized in-situ via a template-free hydrothermal approach".APPLIED SURFACE SCIENCE 412(2017):517-528.