| High-performance photocatalytic peroxymonosulfate activation by carbon quantum dots via precise surface chemistry regulation: Insight into the structure–function relations | |
| Han, Wenyuan1; Li, Degang2; Kong, Yifan2; Liu, Wei3; Qin, Wenwu1,5; Wang, Shaobin4; Duan, Xiaoguang4 | |
| 2023-09-15 | |
| Online publication date | 2023-05 |
| Source Publication | JOURNAL OF COLLOID AND INTERFACE SCIENCE Impact Factor & Quartile |
| ISSN | 0021-9797 |
| Volume | 646Pages:633-648 |
| page numbers | 16 |
| Abstract | Carbon quantum dots (CQDs) are considered promising metal-free green catalysts for the activation of persulfates, but direct experimental evidence to identify the true active sites on the surface of CQDs is still lacking. We prepared CQDs with different oxygen contents by controlling the carbonisation temperature, using a simple pyrolysis method. Photocatalytic activity experiments show that CQDs200 exhibits the best PMS activation performance. By investigating the relationship between the oxygen functional groups on CQDs surface and photocatalytic activity, it was postulated that the C=O groups might be the predominant active site, which was confirmed by selective chemical titrations of the C=O, C-OH and COOH groups. Furthermore, limited to the weak photocatalytic properties of the pristine CQDs, ammonia and phenylhydrazine were used to precisely nitrogen-modify the o-CQD surface. We found that phenylhydrazine-modified o-CQDs-PH promoted the absorption of visible light and the separation of photocarriers, thus enhancing the activation of PMS. Theoretical calculations provide more insights from different levels of the pollutant, fine-tuned CQDs, and their interactions. © 2023 The Authors |
| Keyword | Ammonia Carbon Quantum Dots Carbonization Catalyst activity Chemical activation Nanocrystals Oxygen Photocatalytic activity Semiconductor quantum dots Surface chemistry Active site Carbon quantum dot Carbon quantum dots Carbonyl groups DFT Electronic.structure Performance Peroxymonosulfate Photo-catalytic Photocatalytic activities |
| Publisher | Academic Press Inc. |
| DOI | 10.1016/j.jcis.2023.05.092 |
| Indexed By | EI ; SCIE |
| Language | 英语 |
| WOS Research Area | Chemistry |
| WOS Subject | Chemistry, Physical |
| WOS ID | WOS:001002109700001 |
| EI Accession Number | 20232614306225 |
| EI Keywords | Electronic structure |
| EI Classification Number | 714.2 Semiconductor Devices and Integrated Circuits ; 761 Nanotechnology ; 801.4 Physical Chemistry ; 802.2 Chemical Reactions ; 803 Chemical Agents and Basic Industrial Chemicals ; 804 Chemical Products Generally ; 804.2 Inorganic Compounds ; 933.1 Crystalline Solids |
| Original Document Type | Journal article (JA) |
| PMID | 37216711 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | https://ir.lzu.edu.cn/handle/262010/532221 |
| Collection | 兰州大学 化学化工学院 |
| Corresponding Author | Qin, Wenwu; Duan, Xiaoguang |
| Affiliation | 1.Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Special Function Materials and Structure Design (MOE), College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou; 730000, China; 2.School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo; 255000, China; 3.School of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, ZiGong; 643000, China; 4.School of Chemical Engineering, The University of Adelaide, Adelaide; SA; 5005, Australia; 5.Academy of Plateau Science and Sustainability, People's Government Of Qinghai Province & Beijing Normal University, Xining; 810016, China |
| First Author Affilication | College of Chemistry and Chemical Engineering |
| Corresponding Author Affilication | College of Chemistry and Chemical Engineering |
| Recommended Citation GB/T 7714 | Han, Wenyuan,Li, Degang,Kong, Yifan,et al. High-performance photocatalytic peroxymonosulfate activation by carbon quantum dots via precise surface chemistry regulation: Insight into the structure–function relations[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2023,646:633-648. |
| APA | Han, Wenyuan.,Li, Degang.,Kong, Yifan.,Liu, Wei.,Qin, Wenwu.,...&Duan, Xiaoguang.(2023).High-performance photocatalytic peroxymonosulfate activation by carbon quantum dots via precise surface chemistry regulation: Insight into the structure–function relations.JOURNAL OF COLLOID AND INTERFACE SCIENCE,646,633-648. |
| MLA | Han, Wenyuan,et al."High-performance photocatalytic peroxymonosulfate activation by carbon quantum dots via precise surface chemistry regulation: Insight into the structure–function relations".JOURNAL OF COLLOID AND INTERFACE SCIENCE 646(2023):633-648. |
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