Enhanced azo dye decolorization through charge transmission by sigma-Sb3+-azo complexes on amorphous Sb2S3 under visible light irradiation

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 中国科学院饮用水科学与技术重点实验室

	Enhanced azo dye decolorization through charge transmission by sigma-Sb3+-azo complexes on amorphous Sb2S3 under visible light irradiation
	Li, Fan ; Zhang, Lili ; Hu, Chun ; Xing, Xueci ; Yan, Bing ; Gao, Yaowen ; Zhou, Li
刊名	APPLIED CATALYSIS B-ENVIRONMENTAL
	2019
卷号	240 页码:132-140
关键词	Amorphous Sb2S3 Visible light Photocatalysis Azo group Adsorption Complex
ISSN号	0926-3373
英文摘要	Three types of Sb2S3 with different degrees of crystallinity were synthesized via a hydrothermal procedure by adjusting the concentration of hydrochloric acid. The amorphous Sb2S3 sample (A-Sb2S3) exhibited nearly 13 times higher photocatalytic activity for the decolorization and biodegradability improvement of MO solution compared with both crystalline samples under visible light (lambda > 420 nm). It was verified that MO and Congo Red azo dyes were adsorbed onto A-Sb2S3 by displacing hydroxyl groups (OH-) to complex with Sb3+ on A-Sb2S3, which occurred via sigma bonding to the lone pairs of azo nitrogen atoms with Sb3+ (sigma-Sb-(-N=N-)). Moreover, the decolorization rate of MO was positively related to its adsorption onto A-Sb2S3, and no significant degradation was observed for non-azo intermediates. The predominant photodegradation pathways of MO were reduction and oxidization to sulfanilic acid, NO3- and small-molecule acids. On the basis of photoelectron spectra, ESR (Electron spin resonance) measurements and other experimental information, it was proposed that the complexes (sigma-Sb-(-N=N-)) could transmit photogenerated electrons and holes to the azo group, breaking the -N=N- bond, causing azo dye decolorization to improve their biodegradability; while on the surface of bare A-Sb2S3, the strong coordination interaction of OH- with Sb3+ made OH- groups become the recombination centers for photogenerated electrons and holes during the photocatalytic reaction.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/43452]
专题	生态环境研究中心_中国科学院饮用水科学与技术重点实验室
作者单位	1.Guangzhou Univ, Inst Environm Res Greater Bay, Minist Educ, Key Lab Water Qual & Conservat Pearl River Delta, Guangzhou 510006, Guangdong, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Li, Fan,Zhang, Lili,Hu, Chun,et al. Enhanced azo dye decolorization through charge transmission by sigma-Sb3+-azo complexes on amorphous Sb2S3 under visible light irradiation[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2019,240:132-140.
APA	Li, Fan.,Zhang, Lili.,Hu, Chun.,Xing, Xueci.,Yan, Bing.,...&Zhou, Li.(2019).Enhanced azo dye decolorization through charge transmission by sigma-Sb3+-azo complexes on amorphous Sb2S3 under visible light irradiation.APPLIED CATALYSIS B-ENVIRONMENTAL,240,132-140.
MLA	Li, Fan,et al."Enhanced azo dye decolorization through charge transmission by sigma-Sb3+-azo complexes on amorphous Sb2S3 under visible light irradiation".APPLIED CATALYSIS B-ENVIRONMENTAL 240(2019):132-140.