Jiang, Heyan1; Zang, Cuicui1; Zhang, Yinglan1; Wang, Wenhai2
; Yang, Chaofen3; Sun, Bin1; Shen, Yu1,4; Bian, Fengxia1发表期刊CATALYSIS SCIENCE & TECHNOLOGY
ISSN2044-4753
2020-09-07
卷号10期号:17页码:5964-5972
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)).
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
引用统计被引频次：19[WOS][WOS记录][WOS相关记录]
文献类型期刊论文
条目标识符http://ir.yic.ac.cnhttp://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 7714Jiang, 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.
APAJiang, 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.
MLAJiang, 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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