自牺牲法合成氮空位g-C3N4/Cu2(OH)2CO3异质结及其广谱光固氮性能

doi:10.11896/cldb.22050055

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Abstract In this study,N vacancies-doped g-C₃N₄/Cu₂(OH)₂CO₃ (VCN/Cu) heterojunction catalyst with superior wide-spectrum-driven (from VIS to NIR) N₂ photofixation ability was synthesized via in-situ self-sacrificial method.The experimental results show that the charge transfer between g-C₃N₄ and Cu₂(OH)₂CO₃ follows the ‘Z-scheme’ mechanism.N vacancies-induced defect states might act as the initial charge carriers acceptor to reduce electron/hole recombination,and also promote the interfacial charge transfer from N vacancies of excited g-C₃N₄ to N₂ and O₂molecules absorbed and pre-activated by N vacancies,leading more active sites.The nitrogen photofixation performance of as-prepared catalyst is deeply influenced by the O₂content in reaction system with methanol as hole scavenger.The as-prepared VCN/Cu heterojunction catalyst demonstrates the ammonium ion production rate as high as 14.52 mg·L^-1·h^-1·g^-1under the atmosphere of 50% O₂ and 50% N₂,which is 2.7 times higher than that under pure nitrogen atmosphere,and a ‘three-channel’ ammonia production mechanism is proposed.This study might open up a new vista to nitrogen fixation through the less energy-demanding green photocatalytic process.

Key words： g-C₃N₄ Cu₂(OH)₂CO₃ N₂ photofixation nitrogen vacancies self-sacrificial method

Published: 25 August 2024 Online: 2024-09-10

CLC number:	O641
	O649

Fund:Natural Science Foundation of Liaoning Provincial Science and Technology Department(2019-ZD-0063).

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	LIANG Hongyu
	WANG Bin
	LU Guang
	SHANG Liyan

Cite this article:

LIANG Hongyu,WANG Bin,LU Guang, et al. Efficient Wide-spectrum-driven N₂ Photofixation over g-C₃N₄/Cu₂(OH)₂CO₃ Heterojunction Doped of Nitrogen Vacancies via Self-sacrificial Method[J]. Materials Reports, 2024, 38(16): 22050055-6.

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http://www.mater-rep.com/EN/10.11896/cldb.22050055 OR http://www.mater-rep.com/EN/Y2024/V38/I16/22050055

1 Rafiqul I, Weber C, Lehmann B, et al. Energy, 2005, 30(13), 2487.
2 Schrauzer G N, Guth T D. Journal of the American Chemical Society, 1977, 99(6), 7189.
3 Horrocks S M. Technology & Culture, 2002, 43(3), 622.
4 Zhu D, Zhang L, Ruther R E, et al. Nature Materials. 2013, 12(9), 836.
5 Shilov A E. Russian Chemical Bulletin, 2003, 52(12), 2555.
6 Bazhenova T A, Shilov A E. Coordination Chemistry Reviews. 1995, 144(1), 69.
7 Shilov A E. Metal complexes in biomimetic chemical reactions, CRC Press, US, 1997, pp.73.
8 Shilov A E. Electron transfer in chemistry, Wiley VCH Press, GER, 2001, pp.878.
9 Liang Y T, Vijayan B K, Gray K A, et al. Nano Letters, 2011, 11(7), 2865.
10 Walter M G, Warren E L, McKone J R, et al. Chemical Reviews, 2010, 110(3), 6446.
11 Britto P J, Santhanam K S V, Rubio A, et al. Advanced Materials, 1999, 11(2), 154.
12 Mao Y, Wu M, Li G, et al. Reaction Kinetics, Mechanisms and Catalysis, 2018, 125(2), 1179
13 Dong G H, Ho W K, Wang C. Journal of Materials Chemistry A, 2015, 3(2), 23435.
14 Xiang H B, Gou J J, Wu L, et al. Materials Reports, 2022, 36(6), 21030152 (in Chinese).
向寒宾, 苟浇浇, 吴琳, 等. 材料导报, 2022, 36(6), 21030152.
15 Liang Z, Xue Y, Wang X. Materials Today Nano, 2022, 18, 100204.
16 Prabhakar V S V, Kumar R P A, Jaesool S, et al. ACS Omega, 2018, 3(7), 7587.
17 He Z K, Fu J W, Cheng B, et al. Applied Catalysis B: Environmental, 2017, 205(5), 104.
18 Chen D, Wang X N, Zhang X Q, et al. International Journal of Hydrogen Energy, 2020, 45(46), 24697.
19 Li S J, Chen X, Hu S Z, et al. RSC Advances, 2016, 6(2), 45931.
20 Liang H Y, Zou H, Hu S Z. New Journal of Chemistry, 2017, 41(17), 8920.
21 Zhu J, Ling M, Ma R D, et al. Materials Reports, 2024, 38(11), 23010115 (in Chinese).
朱杰, 凌敏, 马润东, 等. 材料导报, 2024, 38(11), 23010115.
22 Hao X, Dai D S, Li S S. Dalton Transactions, 2018, 47(2), 348.
23 Wang X C, Maeda K A, Thomas K, et al. Nature Materials, 2009, 8(1), 76.
24 Ge L, Han C. Applied Catalysis B:Environmental, 2012, 117 (1), 268.
25 Zhang Y, Liu J, Wu G, et al. Nanoscale, 2012, 4(17), 5300.
26 Niu P, Zhang L, Liu G, et al. Advanced Functional Materials, 2012, 22(22), 4763.
27 Mohapatra P K, Singh N R. Photosynthesis Research, 2015, 123(1), 105.
28 Liu X, Han X, Liang Z, et al. Journal of Colloid and Interface Science, 2022, 605(1), 320.
29 Xy A, Wza B, Jha B, et al. Applied Catalysis A:General, 2020, 601(7), 601.
30 Xiao C, Zhang L, Wang K, et al. Nitrogen fixation, 2018(12), 239.