Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 5, Issue 5, Pages 4449-4456Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.7b00641
Keywords
MOFs; Cr(VI) reduction; Dye degradation; Visible light; Photocatalysis
Categories
Funding
- National Natural Science Foundation of China [21473024, 21101023]
- Natural Science Foundation of Jilin Province [20140101228JC]
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By using a controllable pillared-layer method, a novel visible-light responsive metal organic framework (MOF) photocatalyst NNU-36 has been rationally constructed. The synthesized NNU-36 is of broad-range visible light absorption and good chemical stability which are beneficial to its application of photocatalysis. Photocatalytic experiments reveal that NNU-36 is highly efficient for Cr(VI) reduction and dye degradation in aqueous solution under visible light irradiation. Control experiments show that the pH value is vital for Cr(VI) reaction, and meanwhile, the use of hole scavenger of methanol promotes the photocatalytic reduction significantly. It has been also demonstrated that NNU-36 is efficient for dye degradation, in which the introduction of hydrogen peroxide (H2O2) significantly enhances the photocatalytic efficiency of dye degradation. This study illustrates that the introduction of hole scavengers or oxidants in the MOF-mediated photocatalytic reaction is a feasible approach to enhance the catalytic efficiency by suppressing the recombination of photoexcited electron-hole pairs in MOFs photocatalysts.
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