期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 259, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2019.118064
关键词
MIL-88A-Fe; Fenton-like catalysts; Morphology; Exposed (100) surface
资金
- Tianjin Education Commission [20181KJ108, 2018KJ111]
- National Key R&D Program of China [2018YFC1902100]
- National Natural Science Foundation of China [31700516, 21872125]
- Foundation of Tianjin Key Laboratory of Pulp Paper [201807]
Morphology of MIL-88A-Fe greatly affects their Fenton-like performance. In this work, rod-like, spindle-like and diamond-like MIL-88A-Fe was prepared by changing the ratio of solvents in solvothermal process. Their physicochemical properties are fully investigated by XRD, SEM, TEM, XPS, ESR, and DFT calculation, which confirmed that the exposed (100) ratio of MIL-88A-Fe determined its catalytic performance. The (100) surface of MIL-88A-Fe showed lower energy barrier for H2O2 dissociated into (OH)-O-center dot (dissociated energy 0.58 eV), corresponding value is 0.8 eV for (101) surface. The Fenton-like performance has the order of r-MIL-88A (TOF 5.0 h(-1)) > s-MIL-88A (TOF 3.3 h(-1)) > d-MIL-88A (TOF 2.5 h(-1)), when r-MIL-88A used as catalyst, phenol could be removed 100% in 15 min by the help of H2O2 at room conditions, its activity are better than that of reported Febased MOFs, such as MIL-88B-Fe, MIL-101-Fe, and MIL-53(Fe) etc. This finding probably provide a Fenton-like catalyst by choosing the suitable crystal phase of Fe-based metal organic framework.
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