中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 烟台海岸带研究所
  3. 中国科学院烟台海岸带研究所
  4. 支撑部门
2D MXene-derived Nb2O5/C/Nb2C/g-C(3)N(4)heterojunctions for efficient nitrogen photofixation

文献类型：期刊论文

作者Jiang, Heyan4; Zang, Cuicui4; Zhang, Yinglan4; Wang, Wenhai1; Yang, Chaofen2; Sun, Bin4; Shen, Yu3,4; Bian, Fengxia4
刊名CATALYSIS SCIENCE & TECHNOLOGY
出版日期2020-09-07
卷号10期号:17页码:5964-5972
ISSN号2044-4753
DOI10.1039/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)).
WOS关键词PHOTOCATALYTIC N-2 FIXATION ; GRAPHITIC CARBON NITRIDE ; VISIBLE-LIGHT ; SELECTIVE ADSORPTION ; ENERGY-CONVERSION ; OXYGEN VACANCIES ; AMMONIA ; WATER ; DINITROGEN ; NANOSHEETS
资助项目Natural Science Foundation Project of CQ[cstc2018jcyjAX0735] ; Natural Science Foundation Project of CQ[cstc2019jcyj-msxmX0641] ; National Natural Science Foundation of China[21201184] ; Ministry of Education of Chongqing[KJQN201900811] ; Chongqing Technology and Business University[950119090] ; Chongqing Key Laboratory of Catalysis, New Environmental Materials[KFJJ2019082] ; Key Disciplines of Chemical Engineering and Technology in Chongqing Colleges and Universities[CXQT19023]
WOS研究方向Chemistry
语种英语
WOS记录号WOS:000565991300020
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
源URL[http://ir.yic.ac.cn/handle/133337/28512]  
专题烟台海岸带研究所_支撑部门
通讯作者Jiang, Heyan; Bian, Fengxia
作者单位1.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc & Ecol Remedia, Yantai 264003, Peoples R China
2.Kunming Univ Sci & Technol, Res Ctr Anal & Measurement, Kunming 650093, Yunnan, Peoples R China
3.Chongqing South To Thais Environm Protect Technol, Chongqing 400060, Peoples R China
4.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
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.

入库方式： OAI收割

来源：烟台海岸带研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。