Facile preparation of heterostructured Bi2O3/Bi2MoO6 hollow microspheres with enhanced visible-light-driven photocatalytic and antimicrobial activity |
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| Affiliation: | 1. Key Laboratory of Analytical Chemistry of the State Ethnic Affairs Commission, College of Chemistry and Materials Science, South–Central University for Nationalities, Wuhan, 430074, China;2. School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, 529020, China;3. International Healthcare Innovation Institute (Jiangmen), Jiangmen, 529040, China;4. Institute of Food Science and Engineering Technology, Hezhou University, Hezhou, Guangxi, 542899, China;1. Department of Chemistry and Chemical Engineering, and Key Laboratory of Environmental Biology and Pollution Control, and State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China;2. Department of Environment and Chemical Engineering, and Key Laboratory of Jiangxi Province for Ecological Diagnosis, Remediation and Pollution Control, Nanchang Hangkong University, Nanchang 330063, China;1. Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, College of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong 643000, PR China;2. College of Chemical Engineering, Sichuan University of Science and Engineering, Zigong 643000, PR China;3. College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, PR China;4. Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China;1. School of Chemical Science and Technology, Yunnan University, Kunming 650091, China;2. The Engineering Laboratory of Polylactic Acid-Based Functional Materials of Yunnan Province, School of Chemistry and Biotechnology, Yunnan MinZu University, Kunming 650500, China |
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| Abstract: | Hierarchical β-Bi2O3/Bi2MoO6 heterostructured flower-like microspheres assembled from nanoplates with different β-Bi2O3 loadings (0–26.5 mol%) were synthesized through a one-step template-free solvothermal route. Under visible-light illumination (λ > 420 nm), over 99% of rhodamine B was degraded within 90 min on the 21.9 mol% of β-Bi2O3 loading Bi2O3/Bi2MoO6 microspheres. The remarkable enhancement of photocatalytic activity of the hierarchical Bi2O3/Bi2MoO6 micro/nanostructures can be attributed to the effective separation of the photoinduced charge carriers at the interfaces and in the semiconductors. The electrons (e?) are the main active species in aqueous solution under visible-light irradiation. The Bi2O3/Bi2MoO6 also displays visible-light photocatalytic activity for the destruction of E. coli. In addition, the β-Bi2O3 in the hierarchical Bi2O3/Bi2MoO6 microspheres is very stable and the composite can be easily recycled by a simple filtration step, thus the second pollution can be effectively avoided. A possible photocatalytic mechanism was proposed based on the experimental results. |
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