Journal
APPLIED SURFACE SCIENCE
Volume 509, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2020.145378
Keywords
Fischer-Tropsch waste water; Photo-catalytic ozonation; Internal extended growth method; Fe-based bi-MOFs
Categories
Funding
- Tianjin Education Commission [2018KJ111]
- National Natural Science Foundation of China [31700516, 21872125, 21878290, 21902118]
- Foundation of Tianjin Key Laboratory of Marine Resources and Chemistry at TUST [201705]
- Foundation of Jiangsu Key Laboratory for Biomass Energy and Material [JSBEM201914]
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Fischer-Tropsch waste water (FTW) is with complex organic compositions, and is toxic/stinking odor. So far, FTW is very difficult to be treated in industry. In this work, Fe-based bi-MOFs heterojunctions, i.e., MIL-88A(Fe)@MIL-88B(Fe) are synthesized through internal extended growth of rod-like MIL-88A on spindle-like MIL-88B. The compositions, structure and characteristics are systematically investigated. By virtue of larger surface area, rich active sites and strong interfacial coupling, this bi-MOFs catalyst establish better h(+)-e(-) separation/transfer. As expected, this bi-MOFs hybrid materials shows remarkable photo-catalytic performance toward FTW remediation by the help of ozone. The COD removal in bi-MOFs/O-3 system is 4.2 times higher than that of ozonation alone. Furthermore, h(+), O-center dot(2)- and (OH)-O-center dot are the predominant active radicals for FTW remediation. Bi-MOFs displays acceptable stability after 5 cycles. This work provides a new way for photo-catalytic ozonation and may drive the development of MOFs-based photo-catalytic ozonation for waste water treatment, not limited in FTW.
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