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| Designing heterointerface in BiOBr/g-C3N4 photocatalyst to enhance visible-light-driven photocatalytic performance in water purification | |
| Liang, Yujun1; Zeng, Zikang1,2; Yang, Jian1; Yang, Gui1; Han, Yongsheng2 | |
| 2021-09-05 | |
| Source Publication | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
 |
| ISSN | 0927-7757 |
| Volume | 624Pages:12 |
| Abstract | 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. |
| Keyword | Z-scheme heterojunction BiOBr G-C3N4 Photocatalytic activity Visible light |
| DOI | 10.1016/j.colsurfa.2021.126796 |
| Language | 英语 |
| WOS Keyword | ELECTRON-HOLE RECOMBINATION ; BIOBR NANOSHEETS ; EXPOSED 001 ; IONIC LIQUID ; COMPOSITE ; HETEROJUNCTIONS ; DEGRADATION ; PHOTOREDUCTION ; SEPARATION ; EFFICIENCY |
| Funding Project | National Natural Science Foundation of China[21571162] ; National Natural Science Foundation of China[91934302] ; National Natural Science Foundation of China[21978298] |
| WOS Research Area | Chemistry |
| WOS Subject | Chemistry, Physical |
| Funding Organization | National Natural Science Foundation of China |
| WOS ID | WOS:000660689200004 |
| Publisher | ELSEVIER |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/49143 |
| Collection | 中国科学院过程工程研究所 |
| Corresponding Author | Liang, Yujun; Han, Yongsheng |
| Affiliation | 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 |
| Recommended Citation 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. |
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