CeO2-g-C3N4 S-scheme heterojunctions for enhanced photocatalytic performance: Effects of surface C/N ratio on photocatalytic and adsorption properties
文献类型：期刊论文
| 作者 | Chu, Zhiyao1,2; Li, Junqi1,2; Sohn, Hong Yong3; Chen, Chaoyi1,2; Huang, Xiao4; Lan, Yuanpei1,2; Murali, Arun3; Zhang, Junshan1,2 |
| 刊名 | COMPOSITES PART B-ENGINEERING
 |
| 出版日期 | 2023-05-15 |
| 卷号 | 257页码:13 |
| 关键词 | One-step synthesis CeO2-C-g-C3N4 Photocatalytic performance Effect mechanism Molten salt |
| ISSN号 | 1359-8368 |
| DOI | 10.1016/j.compositesb.2023.110689 |
| 英文摘要 | In this work, novel CeO2-C-g-C3N4 S-scheme heterojunctions with significantly enhanced photocatalytic performance were prepared for the first time by a facile one-step molten KCl-LiCl method. The formation mechanism of CeO2-C-g-C3N4 was discussed, where g-C3N4 turned to C by carbonizing and the surface C content was adjusted by controlling the synthesis conditions. The photocatalytic property of the ternary composites first increased and then decreased with synthesis temperature and time. The 580 degrees C 4h CeO2-C-g-C3N4 exhibited the best performance towards MB (Methylene blue) and TC (Tetracyclines) degradation with a removal degree of 99.9% and 92.5%, respectively. The surface C/N ratio was a key index that influenced the photocatalytic performance, and was calculated to be 0.918-1.352 for various CeO2-C-g-C3N4 catalysts. The 580 degrees C 4h CeO2-C-gC(3)N(4) had an appropriate C/N ratio of 0.930 and a narrow band gap. The formed S-scheme 2D heterojunctions and generated C clearly promoted the separation of photo-excited e(-)/h(+). Besides, it was indicated that e(-) and center dot O-2(-) were the main active species for TC photodegradation. The 580 degrees C 4h CeO2-C-g-C3N4 exhibited a large BET surface area, high negative zeta potential, strong pi-pi electron donor-acceptor interaction, and an excellent MB adsorption ability. It was evident that chemisorption on catalyst surface played an important role for adsorbing MB. The formation mechanism of CeO2-C-g-C3N4 and the effects of the surface C/N ratio on photocatalytic performance, determined in this work, offer new insights for preparing and structuring highly effective photocatalysts, which is expected to promote further photocatalytic and adsorption applications. |
| 资助项目 | National Natural Science Foundation of China[52164025] ; National Natural Science Foundation of China[52164017] ; National Natural Science Foundation of China[U1812402] ; National Natural Science Foundation of China[52074096] ; Basic Research Program from Science amp; Technology Department of Guizhou Province ; Training project from Guizhou University[[2021] 002] ; Guizhou Province[[2020]1Y219] ; [[2019] 30] |
| WOS研究方向 | Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:001029859600001 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/39062]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Lan, Yuanpei |
| 作者单位 | 1.Guizhou Univ, Coll Mat & Met, Dept Met Engn, Guiyang 550025, Guizhou, Peoples R China 2.Guizhou Prov Key Lab Met Engn & Proc Energy Saving, Guiyang 550025, Guizhou, Peoples R China 3.Univ Utah, Dept Mat Sci & Engn, Salt Lake City, UT 84112 USA 4.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chu, Zhiyao,Li, Junqi,Sohn, Hong Yong,et al. CeO2-g-C3N4 S-scheme heterojunctions for enhanced photocatalytic performance: Effects of surface C/N ratio on photocatalytic and adsorption properties[J]. COMPOSITES PART B-ENGINEERING,2023,257:13. |
| APA | Chu, Zhiyao.,Li, Junqi.,Sohn, Hong Yong.,Chen, Chaoyi.,Huang, Xiao.,...&Zhang, Junshan.(2023).CeO2-g-C3N4 S-scheme heterojunctions for enhanced photocatalytic performance: Effects of surface C/N ratio on photocatalytic and adsorption properties.COMPOSITES PART B-ENGINEERING,257,13. |
| MLA | Chu, Zhiyao,et al."CeO2-g-C3N4 S-scheme heterojunctions for enhanced photocatalytic performance: Effects of surface C/N ratio on photocatalytic and adsorption properties".COMPOSITES PART B-ENGINEERING 257(2023):13. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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