One-pot molten salt method for constructing CdS/C3N4 nanojunctions with highly enhanced photocatalytic performance for hydrogen evolution reaction
文献类型：期刊论文
| 作者 | Zhao, Weijia; Niu, Hongyun ; Yang, Yongliang; Lv, Hongzhou; Lv, Jungang; Cai, Yaqi
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| 刊名 | JOURNAL OF ENVIRONMENTAL SCIENCES
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| 出版日期 | 2022-02 |
| 卷号 | 112期号:0页码:244-257 |
| 关键词 | GRAPHITIC CARBON NITRIDE G-C3N4 NANOSHEETS QUANTUM DOTS CDS COMBUSTION HETEROJUNCTION SEMICONDUCTORS DEGRADATION COMPOSITES CATALYSTS |
| ISSN号 | 1001-0742 |
| 英文摘要 | The construction of heterojunction photocatalysts for efficiently utilizing solar energy has attracted considerable attention to solve the energy crisis and reduce environmental pollution. In this study, we use the energy released from an easily-occurred exothermic chemical reaction to serve as the drive force to trigger the formation of CdS and C3N4 nanocomposites which are successfully fabricated with cadmium nitrate and thiourea without addition of any solvents and protection of inert gas at initial temperature, a little higher than the melting point of thiourea. The as-prepared CdS/C3N4 materials exhibit high efficiency for photocatalytic hydrogen evolution reaction (HER) with the HER rate as high as 15,866 Amol/(g.hr) under visible light irradiation (lambda > 420 nm), which is 89 and 9 times those of pristine C3N4 and CdS, respectively. Also, the apparent quantum efficiency (AQE) of CdS/C3N4-1:2-200-2 (CdS/C3N4-1:2-200-2 means the ratio of Cd to S is 1:2 and the reaction temperature is set at 200 degrees C for two hours) reaches 3.25% at lambda = 420 f 15 nm. After irradiated for more than 24 hr, the HER efficiencies of CdS/C3N4 do not exhibit any attenuation. The DFT calculation suggests that the charge difference causes an internal electric field from C3N4 pointing to CdS, which can more effectively promote the transfer of photogenerated electrons from CdS to C3N4. Therefore, most HER should occur on C(3)N(4)surface where photogenerated electrons accumulate, which largely protects CdS from photo-corrosion. (C) 2021 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47591]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 通讯作者 | Niu, Hongyun |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Jianghan Univ, Inst Environm & Hlth, Wuhan 430056, Peoples R China 4.Supreme Peoples Procuratorate, Procurator & Technol & Informat Res Ctr, Beijing 100726, Peoples R China 5.Univ Chinese Acad Sci, Inst Environm & Hlth, Hangzhou Inst Adv Study, Hangzhou 310024, Peoples |
| 推荐引用方式 GB/T 7714 | Zhao, Weijia,Niu, Hongyun,Yang, Yongliang,et al. One-pot molten salt method for constructing CdS/C3N4 nanojunctions with highly enhanced photocatalytic performance for hydrogen evolution reaction[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2022,112(0):244-257. |
| APA | Zhao, Weijia,Niu, Hongyun,Yang, Yongliang,Lv, Hongzhou,Lv, Jungang,&Cai, Yaqi.(2022).One-pot molten salt method for constructing CdS/C3N4 nanojunctions with highly enhanced photocatalytic performance for hydrogen evolution reaction.JOURNAL OF ENVIRONMENTAL SCIENCES,112(0),244-257. |
| MLA | Zhao, Weijia,et al."One-pot molten salt method for constructing CdS/C3N4 nanojunctions with highly enhanced photocatalytic performance for hydrogen evolution reaction".JOURNAL OF ENVIRONMENTAL SCIENCES 112.0(2022):244-257. |
入库方式： OAI收割
来源：生态环境研究中心
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