Fe2O3/C-C3N4-Based Tight Heterojunction for Boosting Visible Light-Driven Photocatalytic Water Oxidation

doi:10.1021/acssuschemeng.8b01799

	Fe2O3/C-C3N4-Based Tight Heterojunction for Boosting Visible Light-Driven Photocatalytic Water Oxidation
	Kong, Lingqiao 1,2; Yan, Junqing 1,2; Li, Ping 1,2; Liu, Shengzhong Frank 1,2,3
刊名	ACS SUSTAINABLE CHEMISTRY & ENGINEERING
	2018-08-01
卷号	6 期号:8 页码:10436-10444
关键词	alpha-Fe2O3 g-C3N4 Heterojunction Water oxidation Photocatalysis
ISSN号	2168-0485
DOI	10.1021/acssuschemeng.8b01799
通讯作者	Yan, Junqing(junqingyan@snnu.edu.cn)
英文摘要	Recently, photocatalytic water splitting for clean hydrogen (H-2) energy through the use of solar energy has been considered to be a promising means of renewable energy conversion. Because of the high activation barriers of oxygen (O-2) generation, the half reaction, i.e., water oxidation, is the rate-limiting steps of the overall water splitting efficiency. Photocatalysts with high activity and nonmetal usage are needed. Herein, we report one new thin-layered heterojunction sample of Fe2O3/C-C3N4, containing layered alpha-Fe2O3 and carbon-coated g-C3N4, obtained through one simple repeatable solid-state synthesis strategy. The layered FeOOH and g-C3N4 are first synthesized working as the precursors. Under N-2 atmosphere and 580 degrees C, the dehydration of FeOOH happens, and it transfers into layered alpha-Fe2O3; the water vapor destroys the van der Waals force of g-C3N4 and induces the parts of edge carbonization. Under the synergistic effect of vapor and heating, the thin-layered Fe2O3/C-C3N4 heterojunction is obtained. Without cocatalyst addition, the obtained sample shows efficient visible-light-driven photocatalytic water oxidation performance, i.e., a 22.3 mu mol/h oxygen evolution rate under the LED lamp of lambda = 420 nm illumination, 3, 16, and 30 times higher than reference Fe2O3/C3N4, bare alpha-Fe2O3, and g-C3N4, respectively. The key parameters for the enhanced photocatalytic activity can be attributable to the carbon layer and the tight contact structure, which can work as the carrier (electrons from g-C3N4 and holes from alpha-Fe2O3) collection center and provide the small migration resistance. Moreover, the carbon shows a different migration rate for electrons and holes and then facilitates the separation of carriers to some extent. To our knowledge, no other papers on Fe2O3/C-C3N4-based photocatalytic water oxidation have been reported. This work can provide a new insight for synthesis of g-C3N4-based photocatalysts, and also help us understand the water oxidation reaction.
资助项目	National Key Research Program of China[2017YFA0204800] ; National Key Research Program of China[2016YFA0202403] ; Natural Science Foundation of China[21603136] ; Natural Science Foundation of China[61674098] ; National Science Basic Research Plan in Shaanxi Province of China[2017JM2007] ; Changjiang Scholar and Innovative Research Team[IRT_14R33] ; 111 Project[B14041] ; Fundamental Research Funds for the Central Universities[GK201602007] ; Fundamental Research Funds for the Central Universities[2018CSLZ011] ; Chinese National 1000-Talent-Plan program
WOS关键词	GRAPHITIC CARBON NITRIDE ; OXYGEN REDUCTION REACTION ; Z-SCHEME ; HYDROGEN-PRODUCTION ; IN-SITU ; EVOLUTION REACTION ; AMORPHOUS-CARBON ; SOLAR HYDROGEN ; G-C3N4 ; PERFORMANCE
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Engineering
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000441475500098
资助机构	National Key Research Program of China ; National Key Research Program of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; National Science Basic Research Plan in Shaanxi Province of China ; National Science Basic Research Plan in Shaanxi Province of China ; Changjiang Scholar and Innovative Research Team ; Changjiang Scholar and Innovative Research Team ; 111 Project ; 111 Project ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Chinese National 1000-Talent-Plan program ; Chinese National 1000-Talent-Plan program ; National Key Research Program of China ; National Key Research Program of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; National Science Basic Research Plan in Shaanxi Province of China ; National Science Basic Research Plan in Shaanxi Province of China ; Changjiang Scholar and Innovative Research Team ; Changjiang Scholar and Innovative Research Team ; 111 Project ; 111 Project ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Chinese National 1000-Talent-Plan program ; Chinese National 1000-Talent-Plan program ; National Key Research Program of China ; National Key Research Program of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; National Science Basic Research Plan in Shaanxi Province of China ; National Science Basic Research Plan in Shaanxi Province of China ; Changjiang Scholar and Innovative Research Team ; Changjiang Scholar and Innovative Research Team ; 111 Project ; 111 Project ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Chinese National 1000-Talent-Plan program ; Chinese National 1000-Talent-Plan program ; National Key Research Program of China ; National Key Research Program of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; National Science Basic Research Plan in Shaanxi Province of China ; National Science Basic Research Plan in Shaanxi Province of China ; Changjiang Scholar and Innovative Research Team ; Changjiang Scholar and Innovative Research Team ; 111 Project ; 111 Project ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Chinese National 1000-Talent-Plan program ; Chinese National 1000-Talent-Plan program
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/166724]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Yan, Junqing
作者单位	1.Shaanxi Normal Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Appl Surface & Colloid Chem, 620 West Changan Ave, Xian 710119, Shaanxi, Peoples R China 2.Shaanxi Normal Univ, Sch Mat Sci & Engn, Shaanxi Engn Lab Adv Energy Technol, 620 West Changan Ave, Xian 710119, Shaanxi, Peoples R China 3.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, iChEM, 457 Zhongshan Rd Dalian, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Kong, Lingqiao,Yan, Junqing,Li, Ping,et al. Fe2O3/C-C3N4-Based Tight Heterojunction for Boosting Visible Light-Driven Photocatalytic Water Oxidation[J]. ACS SUSTAINABLE CHEMISTRY & ENGINEERING,2018,6(8):10436-10444.
APA	Kong, Lingqiao,Yan, Junqing,Li, Ping,&Liu, Shengzhong Frank.(2018).Fe2O3/C-C3N4-Based Tight Heterojunction for Boosting Visible Light-Driven Photocatalytic Water Oxidation.ACS SUSTAINABLE CHEMISTRY & ENGINEERING,6(8),10436-10444.
MLA	Kong, Lingqiao,et al."Fe2O3/C-C3N4-Based Tight Heterojunction for Boosting Visible Light-Driven Photocatalytic Water Oxidation".ACS SUSTAINABLE CHEMISTRY & ENGINEERING 6.8(2018):10436-10444.