ZIF-8/TiO2 composite material, preparation method thereof and wastewater treatment method

A technology of ZIF-8 and composite materials, applied in water/sludge/sewage treatment, water/sewage treatment, special compound water treatment, etc., can solve the problems of poor pollutant treatment effect and low catalytic efficiency, and the method is simple Easy to control, improve stability, and enhance the effect of bonding strength

Pending Publication Date: 2021-10-15
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For existing ZIF-8 / TiO 2 The catalytic efficiency of composite materials is not high, and the pollutant treatment effect is poor. The present invention provides a ZIF-8 / TiO 2 Composite material and its preparation method and wastewater treatment method, using zinc acetate as zinc source to prepare ZIF-8 with high specific surface area, and using it as a loading body to load nano-TiO 2 Preparation of ZIF-8 / TiO as micro-nano reaction vessel 2 composite material

Method used

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  • ZIF-8/TiO2 composite material, preparation method thereof and wastewater treatment method
  • ZIF-8/TiO2 composite material, preparation method thereof and wastewater treatment method
  • ZIF-8/TiO2 composite material, preparation method thereof and wastewater treatment method

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Experimental program
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Effect test

Embodiment 1

[0038]Weigh 0.44g of zinc acetate dihydrate and add it to a 100mL beaker, dissolve it with 30mL of absolute ethanol, sonicate until it is completely dissolved, weigh 4.1g of 2-methylimidazole and add it to a 100mL beaker, dissolve it with 30mL of absolute ethanol, and sonicate until it is completely dissolved . The two solutions were mixed together and ultrasonicated for 3 hours, then the mixed solution was added into a polytetrafluoroethylene-lined autoclave (100mL), after sealing, the autoclave was continuously heated at 150°C for 6h, and cooled to room temperature After centrifugation, get the precipitate and wash it with absolute ethanol and deionized water, and freeze-dry it for 12 hours to obtain ZIF-8 powder. The scanning electron microscope picture of ZIF-8 powder is as follows: figure 1 As shown, according to figure 2 According to the nitrogen adsorption and desorption test, the BET specific surface area of ​​ZIF-8 powder can reach 1899m 3 / g.

Embodiment 2

[0040] Weigh 0.5g of the ZIF-8 powder of Example 1 and add it into 60mL of absolute ethanol and stir for 30min to obtain the ZIF-8 precursor solution. Weigh 0.5g of TiO 2 (10-20nm) was added to the ZIF-8 precursor solution and continued to stir for 1h to obtain ZIF-8, TiO 2 mixed solution, and then ZIF-8, TiO 2 The mixture was sonicated for 3 h to form a homogeneous solution. Transfer the homogeneous solution to a polytetrafluoroethylene-lined autoclave (100mL), seal it, and heat the autoclave at 150°C for 12h, cool to room temperature and centrifuge, take the precipitate with absolute ethanol and remove Washed with ion water, freeze-dried for 12h to obtain ZIF-8 / TiO 2 Composite material, named Z150T150, the scanning electron microscope picture of Z150T150 is as follows image 3 shown.

Embodiment 3

[0042] Embodiment 3 will TiO 2 The addition of 0.5g is replaced by 1.0g, all the other preparation steps are the same as embodiment 2, the ZIF-8 / TiO that will make 2 The composite material is named Z100T200.

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Abstract

The invention relates to the technical field of composite materials, in particular to a ZIF-8/TiO2 composite material, a preparation method thereof and a wastewater treatment method. The preparation method comprises the following steps: (1) preparing ZIF-8 powder by taking zinc acetate dihydrate as a zinc source; (2) uniformly mixing ZIF-8 powder with absolute ethyl alcohol to obtain a ZIF-8 precursor solution, and adding nano TiO2 to obtain a ZIF-8 and TiO2 mixed solution; and (3) carrying out hydro-thermal treatment on the ZIF-8 and TiO2 mixed solution, cooling, centrifuging, taking precipitate, and freeze-drying to obtain the ZIF-8/TiO2 composite material. The wastewater treatment method comprises the step of treating wastewater containing organic pollutants and/or heavy metal pollutants by adopting the ZIF-8/TiO2 composite material. The composite material with high photocatalytic activity is prepared on the basis of avoiding use of explosives and ensuring safe production, and effective degradation of organic pollutants and heavy metal pollutants can be realized.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a ZIF-8 / TiO 2 Composite material and its preparation method and waste water treatment method. Background technique [0002] Metal-organic framework (MOF) is a new type of porous material, which has the advantages of large specific surface area, high porosity, and controllable pore structure. However, due to the poor thermal and hydrothermal stability and solvent resistance of MOF itself, its application space is limited. Zeolitic Imidazolate Frameworks (ZIFs for short) is a class of MOF materials with imidazole and its derivatives as ligands and a zeolite framework structure. It combines the advantages of zeolites and MOFs, and can be used in Adsorption, separation and catalysis, among which ZIF-8 is the most representative one among ZIFs materials. At present, the application research on ZIF-8 has involved many fields such as gas adsorption, hydrogen storage and c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22B01J31/38B01J35/00B01J20/22B01J20/30B01J20/32C02F1/28C02F1/30C02F101/30C02F101/20C02F101/22
CPCB01J31/1691B01J31/1815B01J31/38B01J35/004B01J20/226B01J20/3085B01J20/32C02F1/288C02F1/30B01J2531/26C02F2101/308C02F2101/20C02F2101/22C02F2305/10
Inventor 马洪芳高翔宋宇
Owner QILU UNIV OF TECH
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