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	Fe2o3/c-c3n4-based tight heterojunction for boosting visible light-driven photocatalytic water oxidation
	Kong, Lingqiao1,2; Yan, Junqing1,2; Li, Ping1,2; Liu, Shengzhong Frank1,2,3
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.
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
WOS类目	Chemistry, Multidisciplinary ; GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY ; Engineering, Chemical
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000441475500098
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2373116
专题	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.

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