Facet-dependent performance of anatase TiO2 for photocatalytic oxidation of gaseous ammonia

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	Facet-dependent performance of anatase TiO2 for photocatalytic oxidation of gaseous ammonia
	Chen, Min; Ma, Jinzhu; Zhang, Bo; Wang, Fei; Li, Yaobin; Zhang, Changbin; He, Hong
刊名	APPLIED CATALYSIS B-ENVIRONMENTAL
	2018-04-01
卷号	223 页码:209-215
关键词	Photocatalysis TiO2 Exposed facets Charges separation NH3 oxidation
ISSN号	0926-3373
文献子类	Article; Proceedings Paper
英文摘要	Photocatalytic oxidation of gaseous ammonia (NH3) at room temperature is an efficient method for the elimination of NH3 emitted from indoor and outdoor sources, such as decorative materials, intensive live-stock farming, chemical processes, etc. Herein, we prepared the anatase TiO2 with clean dominant {001}, {101} and {010} facets, and tested their photocatalytic activity for NH3 oxidation. The test results show that the photocatalytic activity order for NH3 oxidation is revealed as {001} > {101} > {010}. The catalysts were characterized by XRD, FE-SEM, XPS, UV-vis, in situ DRIFTS and TPD methods. It is indicated that TiO2 with dominant {001} facets has the highest separation efficiency of the photogenerated charges among three catalysts. Since the photogenerated holes is responsible for initiating the first step of NH3 oxidation, the TiO2 with dominant {001} facets demonstrated the exceptional activity. In addition, the photocatalytic oxidation of NH3 possibly follow the photo-iSCR mechanism. The photogenerated electrons activate 02 and then participate in the formation of reactive intermediate NOx followed by the photo-NH3-iSCR to final products. The present study will improve our understanding about the performance of anatase TiO2 for photocatalytic oxidation of NH3. (C) 2017 Elsevier B.V. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/40812]
专题	生态环境研究中心_大气污染控制中心
推荐引用方式 GB/T 7714	Chen, Min,Ma, Jinzhu,Zhang, Bo,et al. Facet-dependent performance of anatase TiO2 for photocatalytic oxidation of gaseous ammonia[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2018,223:209-215.
APA	Chen, Min.,Ma, Jinzhu.,Zhang, Bo.,Wang, Fei.,Li, Yaobin.,...&He, Hong.(2018).Facet-dependent performance of anatase TiO2 for photocatalytic oxidation of gaseous ammonia.APPLIED CATALYSIS B-ENVIRONMENTAL,223,209-215.
MLA	Chen, Min,et al."Facet-dependent performance of anatase TiO2 for photocatalytic oxidation of gaseous ammonia".APPLIED CATALYSIS B-ENVIRONMENTAL 223(2018):209-215.