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    于洪涛

    • 教授     博士生导师   硕士生导师
    • 性别:男
    • 毕业院校:大连理工大学
    • 学位:博士
    • 所在单位:环境学院
    • 学科:环境工程
    • 办公地点:环境楼B303
    • 电子邮箱:yuhongtao@dlut.edu.cn

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    Tuning Lewis acidity of MIL-88B-Fe with mix-valence coordinatively unsaturated iron centers on ultrathin Ti3C2 nanosheets for efficient photo Fenton reaction

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    论文类型:期刊论文

    发表时间:2020-05-05

    发表刊物:APPLIED CATALYSIS B-ENVIRONMENTAL

    收录刊物:EI、SCIE

    卷号:264

    ISSN号:0926-3373

    关键字:Photo-Fenton; Lewis acidity; Unsaturated metal centers; CUCs-MIL-88B-Fe; Pollutants

    摘要:Iron containing MOFs have been currently estimated as greater candidates for heterogeneous Fenton catalysts due to their open pores and well dispersed metallic components. However, metals in majority of MOFs are bounded by organic linkers, which reduces Lewis acid sites and make them not available for H2O2 activation. Creating coordinatively unsaturated metal centers (CUCs), acting as Lewis acid sites, is a feasible approach for efficient photo-Fenton activity. Here, we successfully synthesized a photo-Fenton CUCs-MIL-88B-Fe catalyst with mixed-valence (Fe-II/Fe-III) on ultrathin Ti3C2 nanosheets. The Lewis acidity was probed by TPD-NH3 and IR-pyridine analysis and tested for pollutants degradation. The results showed that CUCs-MIL-88B-Fe/Ti3C2 displayed highest photo-Fenton activity under visible light irradiation at pH 3.0 and 10 mM H2O2. This could be attributed with the CUCs, fast H2O2 activation, high Lewis acidity and carrier separation with Ti3C2 nanosheets due to its high charge mobility. Furthermore, CUCs-MIL-88B-Fe/Ti3C2 exhibited a good stability and reusability.