Photo-assisted Fenton reactions and growth evolution of crack-urchined CuBi2O4 microspheres assembled by nanorods |
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| Affiliation: | 1. Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Environmental Science and Engineering, Chang''an University, Xi''an 710064, PR China;2. Brook Byers Institute for Sustainable Systems and School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States;3. School of Energy and Power Engineering, Chongqing University, Chongqing 400044, PR China;4. Hebei Province Key Laboratory of Sustained Utilization & Development of Water Recourse, Department of Water Resource and Environment, Hebei Geo University, No. 136 Huai''an Road, Shijiazhuang 050031, Hebei, PR China;5. College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, PR China;1. Zhejiang Key Laboratory of Carbon Materials, Wenzhou University, Wenzhou 325027, China;2. School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China |
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| Abstract: | Hierarchical CuBi2O4 microspheres assembled by nanorods were prepared via a facile hydrothermal process. The nanorods were orderly grown along [001] crystal direction with rectangular cross-sections and a broad diameter distribution ranging of 100–350 nm. One narrow crack is distinct on the surfaces of each microsphere, which separates the microsphere into two approximately equal parts. Growth evolutions of as-prepared CuBi2O4 were fully discussed according to various reaction times. The microspheres were formed by radiated extension of nanorods which split along cleavage planes due to high internal stresses. The as-prepared CuBi2O4 exhibited a strong optical absorption in wavelength of 300–630 nm. Under visible light (λ ≥ 420 nm), an improved degradation efficiency of 89.6% to Rhodamine B (RhB) was determined with the aid of H2O2. The crack-urchined structures as well as the redox reactions between CuBi2O4 and H2O2 should be responsible for it. |
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| Keywords: | Copper bismuth oxide Hierarchical microstructure Growth evolution Fenton reaction |
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