| 2D MXene-derived Nb2O5/C/Nb2C/g-C(3)N(4)heterojunctions for efficient nitrogen photofixation | |
Jiang, Heyan1; Zang, Cuicui1; Zhang, Yinglan1; Wang, Wenhai2 ; Yang, Chaofen3; Sun, Bin1; Shen, Yu1,4; Bian, Fengxia1
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| 发表期刊 | CATALYSIS SCIENCE & TECHNOLOGY
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| ISSN | 2044-4753 |
| 2020-09-07 | |
| 卷号 | 10期号:17页码:5964-5972 |
| DOI | 10.1039/d0cy00656d |
| 通讯作者 | Jiang, Heyan(orgjiang@163.com) ; Bian, Fengxia(bianqian1201@163.com) |
| 英文摘要 | Due to the rather high 940.95 kJ mol(-1)thermodynamic cleavage energy of the N-N triple bond, developing a robust catalytic process for N(2)reduction under mild conditions is a continuing scientific challenge. Here, 2D MXene-derived niobium pentoxide/carbon/niobium carbide/graphite-like carbon nitride (Nb2O5/C/Nb2C/g-C3N4) heterojunctions were explored as photocatalysts for N(2)reduction in water. Nb2O5/C/Nb2C/g-C(3)N(4)heterojunctions were prepared by uniformly growing Nb(2)O(5)on Nb2C and then forming g-C(3)N(4)nanosheetsin situon Nb2O5/C/Nb2C. With an optimized Nb2O5/C/Nb2C : g-C(3)N(4)ratio of 1 : 1, Nb2O5/C/Nb2C/g-C(3)N(4)showed a high nitrogen reduction rate (0.365 mmol h(-1)g(cat)(-1)), which was 9.1 times as high as that of the MXene derived Nb2O5/g-C(3)N(4)composite. It is worth mentioning that the enhanced performance of Nb2O5/C/Nb2C/g-C(3)N(4)should be attributed to the enhancement in photogenerated electron and hole separation efficiency caused by the short-range directional charge transmission over the close contact between Nb(2)O(5)and conductive Nb2C as well as the Schottky junction formed at the Nb2O5/Nb2C interface. By further changing the pH of the catalytic system, the concentration of reactive electrons was adjusted and the energy barrier of proton reduction was improved. With the optimized pH of 9 adjusted with NaOH solution, the nitrogen reduction efficiency could be further promoted 2.5 times (0.927 mmol h(-1)g(cat)(-1)). |
| 资助机构 | Natural Science Foundation Project of CQ ; National Natural Science Foundation of China ; Ministry of Education of Chongqing ; Chongqing Technology and Business University ; Chongqing Key Laboratory of Catalysis, New Environmental Materials ; Key Disciplines of Chemical Engineering and Technology in Chongqing Colleges and Universities |
| 收录类别 | SCI |
| 语种 | 英语 |
| 关键词[WOS] | PHOTOCATALYTIC N-2 FIXATION ; GRAPHITIC CARBON NITRIDE ; VISIBLE-LIGHT ; SELECTIVE ADSORPTION ; ENERGY-CONVERSION ; OXYGEN VACANCIES ; AMMONIA ; WATER ; DINITROGEN ; NANOSHEETS |
| 研究领域[WOS] | Chemistry |
| WOS记录号 | WOS:000565991300020 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.yic.ac.cn/handle/133337/28513 |
| 专题 | 支撑部门 |
| 通讯作者 | Jiang, Heyan; Bian, Fengxia |
| 作者单位 | 1.Chongqing Technol & Business Univ, Coll Environm & Resources, Natl Base Int Sci & Technol Cooperat Intelligent, Chongqing Key Lab Catalysis & New Environm Mat, Chongqing 400067, Peoples R China 2.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc & Ecol Remedia, Yantai 264003, Peoples R China 3.Kunming Univ Sci & Technol, Res Ctr Anal & Measurement, Kunming 650093, Yunnan, Peoples R China 4.Chongqing South To Thais Environm Protect Technol, Chongqing 400060, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiang, Heyan,Zang, Cuicui,Zhang, Yinglan,et al. 2D MXene-derived Nb2O5/C/Nb2C/g-C(3)N(4)heterojunctions for efficient nitrogen photofixation[J]. CATALYSIS SCIENCE & TECHNOLOGY,2020,10(17):5964-5972. |
| APA | Jiang, Heyan.,Zang, Cuicui.,Zhang, Yinglan.,Wang, Wenhai.,Yang, Chaofen.,...&Bian, Fengxia.(2020).2D MXene-derived Nb2O5/C/Nb2C/g-C(3)N(4)heterojunctions for efficient nitrogen photofixation.CATALYSIS SCIENCE & TECHNOLOGY,10(17),5964-5972. |
| MLA | Jiang, Heyan,et al."2D MXene-derived Nb2O5/C/Nb2C/g-C(3)N(4)heterojunctions for efficient nitrogen photofixation".CATALYSIS SCIENCE & TECHNOLOGY 10.17(2020):5964-5972. |
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