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tio 2 The preparation method of /zif-8 composite photocatalyst

A ZIF-8, composite light technology, applied in the field of photocatalysis, can solve the problem of difficult loading of ZIF-8, achieve high thermal stability, improve catalytic degradation efficiency, and have a wide range of applications.

Active Publication Date: 2022-02-11
HUAIHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Based on this, it is necessary to provide a TiO 2 Preparation method of / ZIF-8 composite photocatalyst

Method used

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  • tio <sub>2</sub> The preparation method of /zif-8 composite photocatalyst
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  • tio <sub>2</sub> The preparation method of /zif-8 composite photocatalyst

Examples

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preparation example Construction

[0025] The embodiment of the present invention provides a kind of TiO 2 The preparation method of / ZIF-8 composite photocatalyst comprises the following steps:

[0026] S10, solvothermal reaction is performed on the mixed solution of soluble zinc salt, 2-methylimidazole and the first organic solvent, so that 2-methylimidazole is deprotonated and zinc ions are self-assembled into ZIF-8, filtered, washed, dried and then ground Obtain ZIF-8 powder;

[0027] S20, causing the hydrolyzable titanium source to undergo a hydrolysis reaction with water in a second organic solvent to obtain a first solution containing nano-titanium dioxide sol;

[0028] S30, concentrating the first solution, increasing the concentration of the nano-titanium dioxide sol, to obtain a second solution; and

[0029] S40, adding the ZIF-8 powder to the second solution, thoroughly mixing by ultrasonic vibration, filtering, washing and drying to obtain TiO 2 / ZIF-8 composite photocatalyst.

[0030] TiO provid...

Embodiment 1

[0050] S10, first add 0.89g of Zn(NO 3 ) 2 ·6H 2 O and 0.49 g of 2-methylimidazole were dissolved in 80 ml of N,N-dimethylformamide (DMF), and then the mixed solution was transferred to a tetrafluoroethylene-lined autoclave at 5 °C min -1 The heating rate was raised to 140°C, reacted for 24 hours, and centrifuged to obtain a solid. The solid was washed with 50ml of DMF and methanol three times, and then placed in an oven at 80°C for overnight drying. After drying, it is ground into powder to obtain ZIF-8 powder.

[0051] S22, take 20ml of absolute ethanol and add it to a clean and dry flask, drop 4 drops of 0.2ml glacial acetic acid with a rubber dropper, and stir it magnetically for 5 minutes; take 2ml tetrabutyl titanate and add it to the above mixture, and stir it magnetically for 5 minutes; Slowly add 38ml of deionized water dropwise while stirring. The dropwise addition time is more than 15min. After the dropwise addition, the solution is heated to 45°C and continuousl...

Embodiment 2

[0056] The preparation method is basically the same as that of Example 1, except that in step S30, 1 / 2 of the volume of the first solution is evaporated.

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Abstract

A loaded TiO 2 The preparation method of the composite photocatalyst comprises the following steps: placing the mixed solution of soluble zinc salt, 2-methylimidazole and the first organic solvent in an autoclave and heating the reaction to deprotonate 2-methylimidazole and Zinc ions are self-assembled into ZIF-8, filtered, washed and dried to obtain ZIF-8 powder; the hydrolyzable titanium source is hydrolyzed with water in a second organic solvent to obtain the first solution containing nano-titanium dioxide; Describe the first solution, increase the concentration of the nano-titanium dioxide sol to obtain a second solution; and add the ZIF-8 powder to the second solution, fully mix by ultrasonic vibration, filter, wash and dry to obtain TiO 2 / ZIF‑8 composite photocatalyst.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to a TiO 2 / ZIF-8 composite photocatalyst preparation method. Background technique [0002] Photocatalytic technology, that is, semiconductor photocatalyst technology, can be used to degrade organic wastewater, reduce heavy metal ions, purify air, sterilize, and prevent fog. Therefore, semiconductor photocatalytic materials have received extensive attention in the control of environmental pollution. In order to improve the photocatalytic efficiency and service life of semiconductor materials, as well as ensure the stability and safety of materials, it is very important to continuously develop new photocatalytic materials. [0003] Nano titanium dioxide (TiO 2 ) as a photocatalyst is an n-type semiconductor material with excellent performance, which can make full use of solar energy, is highly efficient, energy-saving and environmentally friendly, and shows good photostabil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/38
CPCB01J31/38B01J35/004
Inventor 向柏霖陈桂万维向德轩
Owner HUAIHUA UNIV
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