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ZIF-67/GO photocatalysis-photothermal composite film as well as preparation method and application thereof

A ZIF-67, composite film technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc., to improve photocatalytic reduction activity and enhance light utilization. , the effect of promoting restoration

Active Publication Date: 2020-09-29
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the organic combination of the two to form a thin film system with high-efficiency photocatalytic-photothermal synergistic properties has not been reported yet.

Method used

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  • ZIF-67/GO photocatalysis-photothermal composite film as well as preparation method and application thereof
  • ZIF-67/GO photocatalysis-photothermal composite film as well as preparation method and application thereof
  • ZIF-67/GO photocatalysis-photothermal composite film as well as preparation method and application thereof

Examples

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preparation example Construction

[0057] A ZIF-67 / GO photocatalytic-photothermal composite film can be prepared according to the preparation method of the above examples. In the ZIF-67 / GO photocatalytic-photothermal composite thin film, ZIF-67 crystals are evenly distributed on the surface of the GO film. The ZIF-67 / GO photocatalytic-photothermal composite thin film has photocatalytic activity in the visible light band of 420-780nm.

[0058] The ZIF-67 / GO photocatalytic-photothermal composite thin film can be used for photocatalytic-photothermal synergistic catalytic reduction of metal ions. Specifically, the ZIF-67 / GO photocatalytic-photothermal composite film has photocatalytic activity in the visible light band, and can be used as a photocatalyst for photocatalytic reduction of metal ions; at the same time, it has a photothermal effect, which can effectively concentrate the reactants and increase the water content. Pollutant removal efficiency in pollution treatment. Wherein, visible light is used in the ...

Embodiment 1

[0060] This embodiment provides a kind of ZIF-67 / GO photocatalytic-photothermal composite thin film, and its preparation method comprises the following steps:

[0061] a) 15mg of graphene oxide is added to 15mL of ultrapure water to obtain a homogeneous solution of graphene oxide, which is GO aqueous solution;

[0062] b) Suction filter the GO aqueous solution on the PTFE membrane, and dry it in the air at room temperature for 12 hours to prepare the GO membrane;

[0063] c) 100mL 5mol / L Co(NO 3 ) 2 ·6H 2 O methanol solution was poured into a petri dish equipped with GO film, and the solution was poured out after being kept at 40°C for 12 h, and the film was washed with methanol; then 100 mL of methanol solution of 2-methylimidazole (2-methylimidazole and The molar ratio of cobalt nitrate in water is 2:1) and poured into the container filled with Co(NO 3 ) 2 ·6H 2 In the petri dish of the GO film soaked in O solution, keep it at 40°C for 12h, pour off the solution, wash ...

Embodiment 2

[0081] The steps of this embodiment and embodiment 1 are basically the same, the difference is only: the Co(NO 3 ) 2 ·6H 2 O methanol solution was replaced by Co(NO 3 ) 2 ·6H 2 O in water, 2-methylimidazole in methanol was replaced by 2-methylimidazole in water.

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Abstract

The invention discloses a preparation method of a ZIF-67 / GO photocatalysis-photothermal composite film, which comprises the following steps: a) adding graphene oxide into ultrapure water, and carryingout ultrasonic treatment to obtain a uniform solution of graphene oxide, i.e., a GO aqueous solution; b) carrying out suction filtration on the GO aqueous solution on a PTFE film, and drying at normal temperature to obtain a GO film; c) pouring a Co(NO3)<2>.6H2O solution into a culture dish filled with the GO film, keeping at 35-45 DEG C for 8-24 hours, pouring out the solution, and cleaning thefilm with methanol; pouring a 2-methylimidazole solution into a culture dish filled with the GO film soaked by the Co(NO3)<2>.6H2O solution, keeping the temperature at 35-45 DEG C for 8-24 hours, pouring out the solution, and cleaning the film with methanol; and finally, drying the film in a vacuum drying oven at 60 DEG C to obtain the ZIF-67 / GO photocatalysis-photothermal composite film. The preparation method of the ZIF-67 / GO photocatalysis-photothermal composite film is simple, the cost is relatively low, and the ZIF-67 / GO photocatalysis-photothermal composite film has excellent photocatalysis-photothermal synergistic performance. The composite film can be used for photocatalytic-photothermal synergistic catalytic reduction of metal ions.

Description

technical field [0001] The invention belongs to the technical field of semiconductor photocatalysis and photothermal materials, and relates to a ZIF-67 / GO photocatalysis-photothermal composite film and its preparation method and application. Background technique [0002] Using semiconductor photocatalysts such as TiO 2 The application of environmental pollution control has attracted more and more attention. However, TiO 2 The wide bandgap allows it to be excited only by ultraviolet light, which only accounts for a small part of the solar spectrum (less than 5%), and the rapid recombination of photogenerated carriers also makes its quantum efficiency very low. How to obtain visible photocatalysts that can make full use of sunlight, be excited in the visible spectral range, and photoinduced carrier separation has become an important research field. Photothermal materials can effectively collect solar energy and convert it into heat energy, increase the temperature of the mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/16B01J31/22B01J35/00C02F1/30C02F1/70C02F101/20
CPCB01J31/1691B01J31/1815B01J31/1625C02F1/30C02F1/70B01J2531/845C02F2305/10C02F2101/20B01J35/39
Inventor 霍宇凝裴文凯丁梦娜石奉艳张俊阳童海建李和兴
Owner SHANGHAI NORMAL UNIVERSITY
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