Degradation of tetracycline by a novel MIL-101(Fe)/TiO2 composite with persulfate

• Published in: Journal of porous materials 2019-12, Vol.26 (6), p.1839-1850
• Main Authors: He, Lei, Zhang, Yaqin, Zheng, Yane, Jia, Qingming, Shan, Shaoyun, Dong, Yanan
• Format: Article
• Language: English
• Subjects: Catalysis; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Degradation; Metal-organic frameworks; Oxidation; Physical Chemistry; Titanium dioxide; Wastewater; Xenon lamps
• ISSN: 1380-2224; 1573-4854
• DOI: 10.1007/s10934-019-00778-y

An effective catalyst of MIL-101(Fe)/TiO 2 composite was synthesized by solvothermal method. The resultant MIL-101(Fe)/TiO 2 was used for advanced oxidation degradation of tetracycline (TC) for the first time. The results indicated that the MIL-101(Fe)/TiO 2 showed higher TC degradation efficiency than pure MIL-101(Fe) or TiO 2 with the persulfate. Using 1 g L −1 MIL-101(Fe)/TiO 2 and persulfate at pH 7, 90.15% degradation rate was achieved under xenon lamp irradiation in 5 min for 20 mg L −1 TC. TiO 2 introduced in the composite played an important role in the degradation process, in which TiO 2 had a synergetic effect with Fe 3+ to generate Fe 2+ , Ti 3+ and radicals. Fe 2+ reacted with persulfate to produce Fe 3+ and a number of · OH to degrade TC. This reaction process was so fast that MIL-101(Fe)/TiO 2 with persulfate could degrade TC fairly rapidly. A novel TiO 2 -based metal–organic frameworks (MOFs) composite was more efficient for degrading pharmaceutical wastewater.