Designing heterointerface in BiOBr/g-C3N4 photocatalyst to enhance visible-light-driven photocatalytic performance in water purification

doi:10.1016/j.colsurfa.2021.126796

	Designing heterointerface in BiOBr/g-C3N4 photocatalyst to enhance visible-light-driven photocatalytic performance in water purification
	Liang, Yujun 1; Zeng, Zikang 1,2; Yang, Jian 1; Yang, Gui 1; Han, Yongsheng 2
刊名	COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
	2021-09-05
卷号	624 页码:12
关键词	Z-scheme heterojunction BiOBr G-C3N4 Photocatalytic activity Visible light
ISSN号	0927-7757
DOI	10.1016/j.colsurfa.2021.126796
英文摘要	A rapid recombination of photo-generated electrons and holes is the intrinsic defect in graphitic carbon nitride (g-C3N4)-based photocatalysts. Inspired by natural photosynthesis, an artificially synthesized Z-scheme photocatalyst can efficaciously restrain the recombination of photogenerated electron-hole pairs and enhance the photoabsorption ability. Herein, a series of novel visible-light-driven (VLD) solid-state Z-scheme BiOBr/g-C3N4 heterostructured photocatalysts were successfully synthesized via a facile in-situ oxidation method which enabled the BiOBr nanosheets to grow on the surface of g-C3N4. The introduction of BiOBr on g-C3N4 to constitute a Z-scheme heterojunction system can effectively broaden the light absorption range and promote the separation of photo-generated electron-hole pairs. Besides, the Z-scheme mechanism proved by active species trapping experiments led to the persistence of photoinduced electrons in the CB of g-C3N4 while holes in the VB of BiOBr, thus ensuring the high redox ability of the charge carriers. Notably, the BC12% sample exhibited the optimized photocatalytic activity in which the RhB molecules were decomposed within 20 min under visible light irradiation, achieving 3.3- and 2.3-fold improvement than the bare g-C3N4 and pristine BiOBr, respectively. Meanwhile, the BC12% sample still revealed the superiority in both photodegrading MO and photoreducing Cr (VI). As an original strategy to obtain samples with highly dispersed heterointerface, this work could provide a facile route for the construction of g-C3N4-based solid-state Z-scheme heterojunction and very promising for practical application.
资助项目	National Natural Science Foundation of China[21571162] ; National Natural Science Foundation of China[91934302] ; National Natural Science Foundation of China[21978298]
WOS关键词	ELECTRON-HOLE RECOMBINATION ; BIOBR NANOSHEETS ; EXPOSED 001 ; IONIC LIQUID ; COMPOSITE ; HETEROJUNCTIONS ; DEGRADATION ; PHOTOREDUCTION ; SEPARATION ; EFFICIENCY
WOS研究方向	Chemistry
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000660689200004
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/49142]
专题	中国科学院过程工程研究所
通讯作者	Liang, Yujun; Han, Yongsheng
作者单位	1.China Univ Geosci, Fac Mat Sci & Chem, Engn Res Ctr Nanogeomat, Minist Educ, Wuhan 430074, Peoples R China 2.Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Inst Proc Engn, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Liang, Yujun,Zeng, Zikang,Yang, Jian,et al. Designing heterointerface in BiOBr/g-C3N4 photocatalyst to enhance visible-light-driven photocatalytic performance in water purification[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2021,624:12.
APA	Liang, Yujun,Zeng, Zikang,Yang, Jian,Yang, Gui,&Han, Yongsheng.(2021).Designing heterointerface in BiOBr/g-C3N4 photocatalyst to enhance visible-light-driven photocatalytic performance in water purification.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,624,12.
MLA	Liang, Yujun,et al."Designing heterointerface in BiOBr/g-C3N4 photocatalyst to enhance visible-light-driven photocatalytic performance in water purification".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 624(2021):12.