期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 162, 期 -, 页码 245-251出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2014.06.049
关键词
MOFs; NH2-mediated; Photocatalysis; Visible light; Cr(VI) reduction
资金
- National Natural Science Foundation of China [21273036, 21177024]
- National Key Basic Research Program of China by China Ministry of Science and Technology National 973 Project [2014CB239303]
Metal-organic framework In-benzenedicarboxylate (MIL-68(In)) and its derivative (In-2-NH2-benzenedicarboxylate, MIL-68(In)-NH2) were prepared via a simple solvothermal method. Powder X-ray diffraction (XRD) confirmed the isoreticular nature of MIL-68(In) and MIL-68(In)-NH2, while Fourier transformed infrared spectra (FUR) proved the effective presence of amino group. Moreover, combined with UV-vis diffuse reflectance spectra (DRS) analysis, it was revealed MIL-68(In)-NH2 shown an extra absorption band in the visible light region with the absorption edge extending to around 440 nm. Importantly, MIL-68(In)-NH2 was proved to perform as an efficient visible-light-driven photocatalyst with considerable activity and stability for the reduction of Cr(VI), which could be attributed to its relatively high CB based on the result of Mott-Schottky experiment. Further experimental results revealed that the addition of hole scavenger and pH value of the reaction solution played important roles in the photocatalytic reduction of Cr(VI). Finally, a possible reaction mechanism had also been investigated in detail. (C) 2014 Elsevier B.V. All rights reserved.
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