Unraveling the mystery of sandwich structure: Emerging photocatalytic hydrogen production by g-C3N5 3 N 5 coupled Nb2C 2 C MXene forming Schottky heterojunction
文献类型：期刊论文
| 作者 | Zhang, Mingzhi1; Zhang, Yan1; Chang, Hui5; Wang, Wenqi1; Wu, Lijiang1; Li, Caixiao1; Li, Yi1; Jing, Xiaoqing1; Yang, Weiting1; Xie, Hongbo1 |
| 刊名 | SEPARATION AND PURIFICATION TECHNOLOGY
 |
| 出版日期 | 2025-02-19 |
| 卷号 | 354页码:13 |
| 关键词 | Niobium carbide Mxene Nitrogen-rich graphitic carbon nitride Sandwich-structure Photocatalytic hydrogen evolution Schottky junction |
| ISSN号 | 1383-5866 |
| DOI | 10.1016/j.seppur.2024.128883 |
| 通讯作者 | Zhang, Yan(tougaoktz@163.com) ; Chang, Hui(changhui2000_mic@sdust.edu.cn) |
| 英文摘要 | The development of new photocatalysts and photocatalytic systems is the essence of the development of photocatalytic hydrogen production engineering. Nitrogen-rich graphite carbon nitride (g-C3N5) 3 N 5 ) has gradually replaced conventional graphite phase carbon nitride (g-C3N4) 3 N 4 ) with a smaller bandgap and high-efficiency visible light utilization. In this study, g-C3N5 3 N 5 and Nb2C 2 C MXene coupled composition with sandwich structure were manufactured by a simple ultrasonic magnetic stirring method and used for photocatalytic hydrogen production. By adjusting the ratios of single components in the system, the hydrogen production rate of the optimal sample 4:1g-C3N5/Nb2C 3 N 5 /Nb 2 C under visible light irradiation is 2529.5 mu mol center dot g-- 1 center dot h- 1 , which is 21 times higher than that of gC3N5. 3 N 5 . The high apparent quantum yield (AQY) value of 17.3 % also proves a high light utilization rate. The atomic force microscopy (AFM) technique reveals variations in the thickness of the samples, while strongly demonstrating the formation of sandwich structure. In addition, X-ray photoelectron spectroscopy (XPS) analysis further reveals the electron transfer paths within the system, preliminarily verifying the formation of Schottky heterojunctions. Kelvin probe force microscopy (KPFM) tests not only re-validate the correctness of the electron transfer path but also demonstrate the accuracy of the energy bands. The density-functional theory (DFT) calculations corroborate that Nb2C 2 C MXene plays the role of a photoco-catalyst to form Schottky heterojunctions with g-C3N5 3 N 5 for efficient carrier separation and migration. This work highlights the key role of sandwich structure photocatalytic systems on photocatalytic performance. |
| WOS关键词 | CARBON NITRIDE ; C3N5 |
| 资助项目 | Brook Byers Institute for Sustainable Systems ; Georgia Research Alliance at the Georgia Institute of Technology ; Hightower Chair ; Shandong Provincial Natural Science Foundation[ZR202103010716] ; Qingdao Natural Science Foundation[23-2-1-233-zyyd-jch] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001278619500001 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/186147]  |
| 专题 | 海洋研究所_海洋腐蚀与防护研究发展中心 |
| 通讯作者 | Zhang, Yan; Chang, Hui |
| 作者单位 | 1.Shandong Univ Sci & Technol, Coll Safety & Environm Engn, Qingdao 266590, Peoples R China 2.Shandong Univ Sci & Technol, Coll Chem & Biol Engn, Qingdao 266590, Peoples R China 3.Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA 30332 USA 4.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Environm Corros & Biofouling, Qingdao 266071, Peoples R China 5.Shandong Univ Sci & Technol, Coll Elect & Automat Engn, Qingdao 266590, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Mingzhi,Zhang, Yan,Chang, Hui,et al. Unraveling the mystery of sandwich structure: Emerging photocatalytic hydrogen production by g-C3N5 3 N 5 coupled Nb2C 2 C MXene forming Schottky heterojunction[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2025,354:13. |
| APA | Zhang, Mingzhi.,Zhang, Yan.,Chang, Hui.,Wang, Wenqi.,Wu, Lijiang.,...&Liu, Qing.(2025).Unraveling the mystery of sandwich structure: Emerging photocatalytic hydrogen production by g-C3N5 3 N 5 coupled Nb2C 2 C MXene forming Schottky heterojunction.SEPARATION AND PURIFICATION TECHNOLOGY,354,13. |
| MLA | Zhang, Mingzhi,et al."Unraveling the mystery of sandwich structure: Emerging photocatalytic hydrogen production by g-C3N5 3 N 5 coupled Nb2C 2 C MXene forming Schottky heterojunction".SEPARATION AND PURIFICATION TECHNOLOGY 354(2025):13. |
入库方式： OAI收割
来源：海洋研究所
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