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Journal of Shanghai University（Natural Science Edition） ›› 0, Vol. ›› Issue (): 54-067.doi: 10.12066/j.issn.1007-2861.2330

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Preparation and photocatalytic performance of Co3O4/SnO2 derived from metal organic framework

WU Hanhong1, LIU Shanxin1, Wang Dawei1, HUANG Ruting1,2, CHEN Zhiwen3   

  1. 1. School of Resources and Environmental Engineering, Anhui University, Hefei 230601, Anhui, China；2. Anhui Province Key Laboratory of Wetland Ecosystem Protection and Restoration, Anhui University,  Hefei 230601, China； 3. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China,
  • Published:2024-02-27

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Abstract: A cubic  Co3O4/SnO2 composite photocatalyst was prepared by combining do-decahedral nano-blocks derived from metal-organic framework (MOF) material ZIF-67 with SnO2 at room temperature. Results showed that the band gap of the calcined  Co3O4/SnO2 material was significantly reduced, and the phenomenon of fluorescence quenching was obvious. The addition of Co3O4 expanded the photoresponse range of SnO2 to visible light or even infrared light and simultaneously promoted the separation of photo-generated carriers during the photocatalytic reaction. With Rhodamine B (RhB) used as the target reactant, the photocatalytic degradation activity of  Co3O4/SnO2 derived from the MOF was investigated under visible light. It was found that  Co3O4/SnO2 could degrade 89.6%RhB within 60 min, which was 4.5 and 3 times greater than those of pure SnO2 and pure ZIF-67, respectively. In addition, Co3O4/SnO2 showed good photoreactivity and stability. Based on these experimental results and those from free-radical quenching experiments, the mechanism of photocatalytic degradation of organic dyes RhB by the MOF-derived Co3O4/SnO2 composite material was proposed.

Key words: Co3O4/SnO2, Metal Organic Framework (MOF), Photocatalytic, Mechanism

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