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Environment-Friendly Carbon Quantum Dots/ZnFe2O4 Photocatalysts: Characterization, Biocompatibility, and Mechanisms for NO Removal
文献类型：期刊论文
| 作者 | Shen, Zhenxing3; Ho, Wingkei4; Lee, Shun Cheng5; Cao, Jun-ji1,2; Zhu, Dandan1; Huang, Yu1,2; Liang, Yanling1; Rao, Yongfang3 |
| 刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2017-03-07 |
| 卷号 | 51期号:5页码:2924-2933 |
| DOI | 10.1021/acs.est.6b04460 |
| 文献子类 | Article |
| 英文摘要 | A highly efficient and environmentally-friendly oxidation process is always desirable for air purification. This study reported a novel carbon quantum dots (CQDs)/ZnFe2O4 composite photocatalyst for the first time through a facile hydrothermal process. The CQDs/ZnFe2O4 (15 vol %) composite demonstrates stronger transient photocurrent response, approximately 8 times higher than that of ZnFe2O4, indicating superior transfer efficiency of photogenerated electrons and separation efficiency of photogenerated electron hole pairs. Compared with pristine ZnFe2O4 nano particles, CQDs/ZnFe2O4 displayed enhanced photocatalytic activities on gaseous NOx removal and high selectivity for nitrate formation under visible light (lambda > 420 nm) irradiation. Electron spin resonance analysis and a series of radical-trapping experiments showed that the reactive species contributing to NO elimination were center dot O-2(-) and center dot OH radicals. The possible mechanisms were proposed regarding how CQDs improve the photocatalytic performance of ZnFe2O4. The CQDs are believed to act as an electron reservoir and transporter as well as a powerful energy-transfer component during the photocatalysis processes over CQDs/ZnFe2O4. samples. Furthermore, the toxicity assessment authenticated good biocompatibility and low cytotoxity of CQDs/ZnFe2O4. The results of this study indicate that CQDs/ZnFe2O4 is a promising photocatalyst for air purification. |
| WOS关键词 | VISIBLE-LIGHT ; HYDROGEN GENERATION ; EFFICIENT PHOTOCATALYST ; ORGANIC POLLUTANTS ; HIGHLY EFFICIENT ; NANOTUBE ARRAYS ; IONIC LIQUID ; DOTS ; DEGRADATION ; SPINEL |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000395963800052 |
| 源URL | [http://ir.ieecas.cn/handle/361006/5495]  |
| 专题 | 地球环境研究所_粉尘与环境研究室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian 710061, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, SKLLQG, Xian 710061, Peoples R China 3.Xi An Jiao Tong Univ, Dept Environm Sci & Engn, Xian 710049, Peoples R China 4.Educ Univ Hong Kong, Dept Sci & Environm Studies, Hong Kong, Hong Kong, Peoples R China 5.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Hong Kong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shen, Zhenxing,Ho, Wingkei,Lee, Shun Cheng,et al. Environment-Friendly Carbon Quantum Dots/ZnFe2O4 Photocatalysts: Characterization, Biocompatibility, and Mechanisms for NO Removal[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2017,51(5):2924-2933. |
| APA | Shen, Zhenxing.,Ho, Wingkei.,Lee, Shun Cheng.,Cao, Jun-ji.,Zhu, Dandan.,...&Rao, Yongfang.(2017).Environment-Friendly Carbon Quantum Dots/ZnFe2O4 Photocatalysts: Characterization, Biocompatibility, and Mechanisms for NO Removal.ENVIRONMENTAL SCIENCE & TECHNOLOGY,51(5),2924-2933. |
| MLA | Shen, Zhenxing,et al."Environment-Friendly Carbon Quantum Dots/ZnFe2O4 Photocatalysts: Characterization, Biocompatibility, and Mechanisms for NO Removal".ENVIRONMENTAL SCIENCE & TECHNOLOGY 51.5(2017):2924-2933. |
入库方式： OAI收割
来源：地球环境研究所
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