上海大学学报(自然科学版) ›› 0, Vol. ›› Issue (): 54-067.doi: 10.12066/j.issn.1007-2861.2330

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金属有机框架衍生的Co3O4/SnO2复合材料制备及其光催化性能

吴函鸿1, 刘善鑫1, 王大卫1, 黄茹婷1,2, 陈志文3   

  1. 1. 安徽大学 资源与环境工程学院, 合肥 230601;2. 安徽大学 湿地生态保护与修复安徽省重点实验室, 合肥 230601; 3. 上海大学 环境与化学工程学院, 上海 200444
  • 发布日期:2024-02-27
  • 通讯作者: 黄茹婷(1992—),女,博士,研究方向金属有机骨架材料等. E-mail:huangruting24@163.com
  • 基金资助:
    安徽省教育厅重点项目(KJ2020A0017);安徽省矿山修复工程实验室2020年开放课题(K130339038)

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

摘要: 金属有机框架 (metal-organic framework, MOF) 材料 ZIF-67 衍生 Co3O4 十二面体纳米块在室温下与 SnO2 复合, 制备出立方体 Co3O4/SnO2 复合光催化剂. 煅烧后形成的Co3O4/SnO2 材料禁带宽度明显降低, 荧光淬灭明显, 说明 Co3O4 的加入拓展了 SnO2 的光响应范围至可见光甚至红外光区域, 同时促进了光催化反应过程中光生载流子的分离. 以罗丹明 B(Rhodamine B, RhB) 为目标反应物, 在可见光下考察了 MOF 衍生的 Co3O4/SnO2 的光催化降解活性, 发现 Co3O4/SnO2 在 60 min 内可以降解 89.6% 的 RhB, 分别是纯 SnO2和纯 ZIF-67 的 4.5 倍和 3 倍. 同时,  Co3O4/SnO2表现出了良好的光反应能力和稳定性. 基于以上实验结果并结合自由基淬灭实验, 提出了 MOF 衍生的  Co3O4/SnO2 复合材料光催化降解有机染料 RhB 的机理.

关键词: Co3O4/SnO2, 金属有机框架, 光催化, 机理

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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