Peroxymonosulfate enhanced photocatalytic decomposition of silver-cyanide complexes using g-C3N4 nanosheets with simultaneous recovery of silver
文献类型：期刊论文
| 作者 | Qiao, Meng ; Wu, Xiaofei; Zhao, Shen; Djellabi, Ridha; Zhao, Xu
|
| 刊名 | APPLIED CATALYSIS B-ENVIRONMENTAL
 |
| 出版日期 | 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. |
| 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. |
入库方式： OAI收割
来源：生态环境研究中心
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