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Abstract:
The intensification of industrial production has led to a sharp increase in the discharge of toxic organic chemicals and wastewater from printing and dyeing industry. In this study, flower-like ZnO modified TiO 2 @Ti 3 C 2 T x composites (ZnO/TiO 2 @Ti 3 C 2 T x ) were prepared by in -situ oxidation solvothermal method from zinc nitrate hexahydrate and tetramethylammonium hydroxide intercalated Ti 3 C 2 T x . During the solvothermal processes, sodium hydroxide acted as an etchant to further exfoliated the accordion -like Ti 3 C 2 T x into single or few -layer; and at the same time, TiO 2 was formed in -situ on the surface of Ti 3 C 2 T x with simultaneous deposition of flower-like ZnO. The layer structural Ti 3 C 2 T x facilitates the loading and dispersion of ZnO and TiO 2 on its surface. After the in -situ oxidation by solvothermal method, TiO 2 was evenly distributed on the surface of Ti 3 C 2 T x , adjusting the functional groups on the surface of the ZnO/TiO 2 @Ti 3 C 2 T x composite, and improving its adsorption performance. ZnO/TiO 2 @Ti 3 C 2 T x can be used as an efficient adsorbent for malachite green with a high maximum adsorption capacity of 1232.7 mg g -1 , which is higher than that of TiO 2 @Ti 3 C 2 T x (628.57 mg g -1 ). Moreover, a superhydrophilic and underwater superoleophobic ZnO/TiO 2 @Ti 3 C 2 T x @PU sponge was prepared by loading ZnO/TiO 2 @Ti 3 C 2 T x onto polyurethane (PU) sponge. The introduction of ZnO enhances the surface roughness of the ZnO/TiO 2 @Ti 3 C 2 T x @PU sponge, which can effectively separate six oil -water mixtures, and has a high separation flux of 171784 L m - 2 h -1 and separation efficiency of 99.6% for cyclohexane-water mixture.
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JOURNAL OF CLEANER PRODUCTION
ISSN: 0959-6526
Year: 2024
Volume: 447
9 . 8 0 0
JCR@2023
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