| LIU Jia-qin,DAI Meng-jia,RUAN Li-li,XU Juan,WANG Yan,WU Yu-cheng.Novel multi-heterostructured Pt-BiOBr/TiO2 nanotube arrays with remarkable visible-light photocatalytic performance and stability[J].Optoelectronics Letters,2017,13(3):165-171 |
| Novel multi-heterostructured Pt-BiOBr/TiO2 nanotube arrays with remarkable visible-light photocatalytic performance and stability |
| Author Name | Affiliation | | LIU Jia-qin | Institute of Industry & Equipment Technology, Hefei University of Technology, Hefei 230009, China
Anhui Provincial Key Laboratory of Advanced Functional Materials and Devices, Hefei 230009, China
Department of Electronic Materials Engineering, Australian National University, Canberra 2601, Australia | | DAI Meng-jia | Institute of Industry & Equipment Technology, Hefei University of Technology, Hefei 230009, China | | RUAN Li-li | School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China | | XU Juan | School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China | | WANG Yan | School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China | | WU Yu-cheng | Anhui Provincial Key Laboratory of Advanced Functional Materials and Devices, Hefei 230009, China
Department of Electronic Materials Engineering, Australian National University, Canberra 2601, Australia |
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| Abstract: |
| Unique multiple heterojunction of Pt-BiOBr/TiO2 nanotube arrays (Pt-BiOBr/TNTAs) was achived by successively loading both Pt nanoparticles (NPs) and BiOBr nanoflkes (NFs) on surface of ordered and spaced TiO2 nanotubes (NTs) using anodization followed by solvothermal and sequential chemical bath deposition (S-CBD) method. The fabricated Pt-BiOBr/TNTAs were fully characterized, and the photocatalytic (PC) activity and stability of Pt-BiOBr/TNTAs toward degradation of methyl orange (MO) under visible-light irradiation (λ>400 nm) were evaluated. The results reveal that multiple heterostructures of Pt/TiO2, Pt/BiOBr and BiOBr/TiO2 are constructed among TNTAs substrate, Pt NPs and BiOBr NFs, and the hybrid Pt-BiOBr/TNTAs catalyst exhibits remarkable visible-light PC activity, favourable reusability and long-term stability. The combined effect of several factors may contribute to the remarkable PC performance, including strong visible-light absorption by both Pt NPs and BiOBr NFs, lower recombination rate of photo-generated electrons and holes attributed to the multiple heterojunction, microstructures for facile light injection and adsorption as well as efficient mass transport, and larger specific surface area for enhancing light absorption, increasing the effective contact area between the absorbed dye molecules and catalyst and benefiting the molecule transport of reactants or products. This work has been supported by the National Natural Science Foundation of China (Nos.51402078 and 51302060), Anhui Provincial Natural Science Foundation (No.1408085QE85), and the Young Scholar Enhancement Foundation (Plan B) of Hefei University of Technology in China (No.JZ2016HGTB0711). E-mail:jqliu@hfut.edu.cn |
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