Preparation method of ZnO-coated ZIF-8 core-shell nano composite material with efficient photocatalytic performance

A nanocomposite material and photocatalytic technology, which is applied in the field of preparation of ZnO@ZIF-8 core-shell nanocomposite materials, can solve the problems of large thickness and inability to significantly improve the photocatalytic efficiency of composite materials, and achieve the effect of improving photocatalytic performance
CN113000068AActive Publication Date: 2021-06-22JIAXING UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIAXING UNIV
Publication Date
2021-06-22

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Abstract

The invention discloses a preparation method of a ZnO-coated ZIF-8 core-shell nano composite material with efficient photocatalytic performance. The preparation method comprises the following steps: in a H2O-organic solvent, reacting zinc oxide nanorods with 2-methylimidazole molecules in the organic solvent, repeatedly washing the reaction product with alcohol and water, and freeze-drying to obtain the ZnO-coated ZIF-8 core-shell nano composite material with a core-shell structure. The preparation method specifically comprises the following steps: (1) weighing 0.1-0.5 g of ZnO nanorods for later use; (2) preparing 20 mL of a 2-methylimidazole organic solvent solution with the mass concentration of 0.5-12 mg / ml for later use; and (3) mixing and pouring the mixture obtained in the step (1) and the step (2) into a tetra-fluorine reaction kettle, then adding 0.01-0.2 ml of deionized water, enabling the zinc oxide nanorod to react with 2-methylimidazole molecules under a solvothermal condition, and carrying out closed reaction for 8-72 hours.
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Description

technical field

[0001] The invention belongs to the field of photocatalytic materials, and in particular relates to a preparation method of a ZnO@ZIF-8 core-shell nanocomposite material with high photocatalytic performance using ZnO as the core and ZIF-8 as the shell. Background technique

[0002] Photocatalytic technology has been widely studied in the treatment of refractory organic wastewater and comprehensive wastewater due to its advantages of high catalytic activity, simple equipment, convenient operation, low energy consumption, strong oxidation ability, and no secondary pollution. ZnO is a common n-type semiconductor photocatalyst. However, the wide band gap energy and the rapid recombination of electron-hole pairs generated by photoexcitation have greatly limited the application of ZnO photocatalysts. Heterostructure materials have become an important way to improve the photocatalytic performance of ZnO semiconductors because of their advantages such as easy control...

Claims

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