Peroxymonosulfate enhanced photocatalytic decomposition of silver-cyanide complexes using g-C3N4 nanosheets with simultaneous recovery of silver

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

	Peroxymonosulfate enhanced photocatalytic decomposition of silver-cyanide complexes using g-C3N4 nanosheets with simultaneous recovery of silver
	Qiao, Meng; Wu, Xiaofei; Zhao, Shen; Djellabi, Ridha; Zhao, Xu
刊名	APPLIED CATALYSIS B-ENVIRONMENTAL
	2020-05-15
卷号	265 页码:1-9
关键词	Ag-cyanide complexes g-C3N4 nanosheets Peroxymonosulfate Photocatalysis Ag recovery
ISSN号	0926-3373
英文摘要	Due to the complicated chemical nature and toxicity of noble metal-cyanide complexes, the appropriate treatment of wastewaters contaminated with such pollutants is challenging. In this study, the simultaneous decomposition of Ag-cyanide and recovery of precious Ag from Ag-cyanide aqueous solution was investigated using a synergistic peroxymonosulfate (PMS)/g-C3N4 nanosheets system under visible light (lambda > 400 nm). The combination of g-C3N4 (1.0 g/L) and PMS (0.5 mM) resulted in higher Ag-cyanide (0.45 mM) decomposition under visible light and Ag recovery efficiencies (74% and 68%, respectively) compared with single PMS oxidation or g-C3N4 photocatalytic oxidation within 150 min. Ag species deposited on g-C3N4 in the form of metallic Ag degrees and Ag2O may also further improve the decomposition of Ag-cyanide complexes. Ag species deposited on g-C3N4 can enhance the separation of electron/hole charges of the photoactive g-C3N4. Quenching of reactive oxygen species (ROS) experiments and electron spin resonance (ESR) analysis showed the generation of SO4 center dot-, (OH)-O-center dot, O-center dot(2)- , O-1(2) and e- species in this system, among them O-center dot(2)-, O-1(2) , and e- were the most active species for the decomposition of Ag-cyanide complexes.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/45340]
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
推荐引用方式 GB/T 7714	Qiao, Meng,Wu, Xiaofei,Zhao, Shen,et al. Peroxymonosulfate enhanced photocatalytic decomposition of silver-cyanide complexes using g-C3N4 nanosheets with simultaneous recovery of silver[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2020,265:1-9.
APA	Qiao, Meng,Wu, Xiaofei,Zhao, Shen,Djellabi, Ridha,&Zhao, Xu.(2020).Peroxymonosulfate enhanced photocatalytic decomposition of silver-cyanide complexes using g-C3N4 nanosheets with simultaneous recovery of silver.APPLIED CATALYSIS B-ENVIRONMENTAL,265,1-9.
MLA	Qiao, Meng,et al."Peroxymonosulfate enhanced photocatalytic decomposition of silver-cyanide complexes using g-C3N4 nanosheets with simultaneous recovery of silver".APPLIED CATALYSIS B-ENVIRONMENTAL 265(2020):1-9.