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Preparation method and application of TiO2-coated HKUST-1 composite photocatalyst

A technology of HKUST-1 and catalyst is applied in the field of preparation of composite photocatalyst based on TiO2@HKUST-1 to achieve the effects of enriching pore structure, improving visible light catalytic performance and high yield

Active Publication Date: 2021-03-16
JILIN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For the problem of existing photocatalytic degradation material source, the purpose of the present invention is to provide a kind of based on TiO 2 The preparation method and application of @HKUST-1 composite photocatalyst, which not only maintains its own adsorption properties, but also has better catalytic properties

Method used

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  • Preparation method and application of TiO2-coated HKUST-1 composite photocatalyst
  • Preparation method and application of TiO2-coated HKUST-1 composite photocatalyst
  • Preparation method and application of TiO2-coated HKUST-1 composite photocatalyst

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preparation example Construction

[0039] A kind of visible light response TiO provided by the invention 2 The preparation method of @HKUST-1 composite material includes the following steps:

[0040] (1) Fully dissolve a certain amount of PVP in 50-100-200mL, 0.01mol / L, Cu(NO 3 ) 2 In the solution, a certain amount of TiO was quickly added after ultrasonic dispersion 2 Aqueous solution and 60~100~300μLN 2 h 4 . h 2 O solution, observe that the color changes from green to yellow, stir for 2-10-20 minutes, centrifuge the product at 8000rpm / 10min, wash several times with ethanol and deionized water, and finally TiO 2 @Cu 2 O was dispersed in 2.5-5-10mL benzyl alcohol and stored at 0-4°C.

[0041] (2) Add trimesic acid (0.05~0.5~1.0mmol, 0.01~0.1~0.21g) into a mixed solution of 1.5~10~15mL benzyl alcohol and 0.1~5~10mL ethanol, and ultrasonically disperse for 30~100 minutes to obtain Uniform solution, take 0.5 ~ 5 ~ 10mL TiO 2 @Cu 2 O solution was added to it, and the precipitate obtained after centrifugat...

Embodiment 1

[0048] TiO 2 @Cu 2 Preparation of O: fully dissolve 1g polyvinylpyrrolidone (PVP) in 50mL, 0.01mol / L, Cu(NO 3 ) 2 solution, magnetically stirred, ultrasonically dispersed for 30 minutes, and quickly added 50mL TiO 2 aqueous solution and 60 μL N 2 h 4 . h 2 O solution, observe that the color changes from green to yellow, stir for 2 minutes, the product is centrifuged at 8000rpm, 10min, washed several times with ethanol, deionized water (1:1), and finally TiO 2 @Cu 2 O was dispersed in 2.5 mL benzyl alcohol and stored at 4 °C.

[0049] TiO 2 @Cu 2 Preparation of O@HKUST-1: Add trimesic acid (0.05mmol, 0.01g) to a mixed solution of 1.5mL benzyl alcohol and 0.1mL ethanol, ultrasonically disperse for 30 minutes to obtain a homogeneous solution, take 0.5mL TiO 2 @Cu 2 O solution was added to it, shaken by hand to make it thoroughly mixed, reacted for about 2 hours, continued to react at room temperature for about 1 hour and then centrifuged, and the precipitate was washe...

Embodiment 2

[0052] TiO 2 @Cu 2 Preparation of O: fully dissolve 1g PVP in 90mL, 0.01mol / L, Cu(NO 3 ) 2 solution, magnetic stirring, ultrasonic dispersion for 40 minutes, quickly added 70mL TiO 2 aqueous solution and 90 μL N 2 h 4 . h 2 O solution, observed that the color changed from green to yellow, stirred for 8 minutes, the product was centrifuged at 8000rpm, 10min, washed several times with ethanol, deionized water (1:1.5), and finally TiO 2 @Cu 2 O was dispersed in 5 mL benzyl alcohol and stored at 2 °C.

[0053] TiO 2 @Cu 2 Preparation of O@HKUST-1: Trimellitic acid (0.3mmol, 0.063g) was added to a mixed solution of 7.5mL benzyl alcohol and 0.5mL ethanol, ultrasonically dispersed for 40 minutes to obtain a uniform solution, and 4.5mL TiO 2 @Cu 2 O solution was added to it, shaken by hand to make it thoroughly mixed, reacted for about 2 hours, continued to react at room temperature for about 1 hour and then centrifuged, and the precipitate was washed several times with me...

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Abstract

The invention relates to a preparation method and application of a TiO2-coated HKUST1 composite photocatalyst. The preparation method comprises the following steps: fully dissolving PVP in a Cu (NO3)2 solution, carrying out ultrasonic dispersion, rapidly adding a certain amount of a TiO2 aqueous solution and an N2H4.H2O solution, observing that the color is changed from green to yellow, uniformlystirring, centrifuging, washing with ethanol and deionized water several times, and synthesizing TiO2-coated Cu2O by using Cu2O as a sacrificial template agent; adding a TiO2-coated Cu2O solution into a mixed solution of trimesic acid, benzyl alcohol and ethanol, reacting, centrifuging to obtain a precipitate, washing the precipitate with methanol, and synthesizing TiO2-coated Cu2O-coated HKUST1by an in-situ growth method; dispersing TiO2-coated Cu2O-coated HKUST1 in a methanol solution, heating, centrifuging the product, and repeatedly washing with methanol to obtain the product TiO2-coatedHKUST1 dispersed in methanol. The composite material is applied to the fields of selective adsorption, separation of H2, N2, O2, CO2 and CH4 gases, industrial three-waste treatment, dye degradation,organic pollutant-containing wastewater treatment and the like. The synthesis method has the characteristics of low cost, high yield, strong repeatability, stable product performance and the like.

Description

technical field [0001] The invention belongs to the field of catalytic degradation of organic pollutants in water under visible light, specifically a TiO-based 2 Preparation method and application of @HKUST-1 composite photocatalyst. Background technique [0002] Environmental pollution is a major problem facing human society today, directly related to ecological stability and human health, and is an environmental problem that needs to be solved urgently. Semiconductor photocatalysis technology is an advanced catalytic technology that has been studied more at present. It mainly uses the interaction between light and catalysts to mineralize or directly degrade organic pollutants into small molecules such as H 2 O.CO 2 It is an ideal method for degrading environmental pollutants, and it has broad application prospects in solving environmental pollution problems. TiO in semiconductor photocatalyst 2 Is the most representative, it has a strong oxidation, can degrade and mine...

Claims

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Application Information

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IPC IPC(8): B01J31/22B01D53/86B01D53/44C02F1/30C02F101/30
CPCB01J31/2239B01J31/1691B01D53/8687C02F1/30B01D2257/708C02F2305/10C02F2101/30B01J35/396B01J35/39
Inventor 乔宇杨帅吕娜徐娜车广波
Owner JILIN NORMAL UNIV