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Preparation method of Cu:ZnO/N:rGO composite photocatalyst

A catalyst and composite light technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., to achieve high photocatalytic activity, high photocatalytic degradation activity, and good repeatability

Active Publication Date: 2016-04-27
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, there is no research and report on the simultaneous doping of ZnO and rGO before recombination

Method used

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  • Preparation method of Cu:ZnO/N:rGO composite photocatalyst
  • Preparation method of Cu:ZnO/N:rGO composite photocatalyst
  • Preparation method of Cu:ZnO/N:rGO composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) 0.659gZn(CH 3 COOH) 2 2H 2 O, 0.42gHMTA, 6mgCu(CH 3 COO) 2 2H 2 O was added to 100ml of deionized water, continuously stirred until fully dissolved, 70ml of the mixed solution was placed in a 100ml reaction kettle and kept at 90°C for 4h, and the obtained precipitate was centrifuged and dried to obtain Cu-doped ZnO nanorods;

[0023] (2) Disperse the Cu-doped ZnO nanorods prepared in step (1) in deionized water, then add 5wt% GO solution, stir well for 1h, transfer the mixed solution to a hydrothermal kettle at 120°C for 12h , and then the obtained precipitate was centrifuged and dried to obtain Cu:ZnO / rGO powder.

[0024] (3) The Cu:ZnO / rGO powder prepared by the step (2) is placed in a quartz boat, and first passed through 5minNH 3 10% NH by volume 3 Mixed gas with Ar, then heated up to 200°C at a rate of 20°C / min, then raised to 500°C at a constant speed within 5 minutes, and then cooled to room temperature with the furnace, and the sample was taken out to...

Embodiment 2

[0033] (1) 0.659gZn(CH 3 COOH) 2 2H 2 O, 0.42gHMTA, 12mgCu(CH 3 COO) 2 2H 2 O was added to 100ml of deionized water, continuously stirred until fully dissolved, 70ml of the mixed solution was placed in a 100ml reaction kettle and kept at 90°C for 4h, the obtained precipitate was centrifuged and dried to obtain Cu-doped ZnO nanorods;

[0034] (2) Disperse the Cu-doped ZnO nanorods prepared in step (1) in deionized water, then add 5wt% GO solution, stir well for 1 hour, then transfer the mixed solution to a hydrothermal kettle at 120°C for 12 hours , and then the obtained precipitate was centrifuged and dried to obtain Cu:ZnO / rGO powder.

[0035] (3) Place the Cu:ZnO / rGO powder prepared in step (2) in a quartz boat, and pass through 5minNH 3 10% NH by volume 3Mixed gas with Ar, then heated up to 200°C at a rate of 20°C / min, then raised to 300°C at a constant speed within 5 minutes, and then cooled to room temperature with the furnace, and the sample was taken out to obtai...

Embodiment 3

[0037] (1) 0.659gZn(CH 3 COOH) 2 2H 2 O, 0.42gHMTA, 18mgCu(CH 3 COO) 2 2H 2 O was added to 100ml of deionized water, continuously stirred until fully dissolved, 70ml of the mixed solution was placed in a 100ml reaction kettle and kept at 90°C for 4h, and the obtained precipitate was centrifuged and dried to obtain Cu-doped ZnO nanorods;

[0038] (2) Disperse the Cu-doped ZnO nanorods prepared in step (1) in deionized water, then add 5wt% GO solution, stir well for 1h, transfer the mixed solution to a hydrothermal kettle at 120°C for 12h , and then the obtained precipitate was centrifuged and dried to obtain Cu:ZnO / rGO powder.

[0039] (3) Place the Cu:ZnO / rGO powder prepared in step (2) in a quartz boat, and pass through 5minNH 3 10% NH by volume 3 Mixed gas with Ar, then heated up to 200°C at a rate of 20°C / min, then raised to 400°C at a constant speed within 5 minutes, and then cooled to room temperature with the furnace, and the sample was taken out to obtain a Cu:Zn...

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Abstract

The invention discloses a preparation method of a p-n junction type Cu:ZnO / N:rGO composite photocatalyst formed by Cu doped ZnO nanorods and N doped rGO. The Cu:ZnO / N:rGO composite photocatalyst is formed by coating the Cu doped p-type ZnO nanorods with the N doped n-type rGO. The preparation method comprises the following steps: the Cu doped ZnO nanorods are prepared with a hydrothermal method firstly; then the Cu doped ZnO nanorods and GO are assembled with a hydrothermal reduction method to form a Cu:ZnO / rGO composite photocatalyst; finally, Cu:ZnO / rGO is subjected to annealing treatment in NH3 atmosphere for N doping, and the Cu:ZnO / N:rGO composite photocatalyst is obtained. The Cu:ZnO / N:rGO composite photocatalyst prepared with the method has very high photocatalytic activity in ultraviolet light and can inhibit photo-corrosion of ZnO, the stability of the photocatalyst is improved greatly, and the photocatalyst has great potential application values in the field of sewage treatment.

Description

technical field [0001] The invention relates to a preparation method of a photocatalyst, which belongs to the technical field of semiconductor nanometer photocatalytic materials. Background technique [0002] Energy shortage and environmental pollution are the main challenges that mankind will face in the future, and photocatalytic water splitting and pollutant degradation are considered to be effective ways to solve these two problems. compared to conventional TiO 2 , ZnO, which is also a wide bandgap semiconductor, has more abundant sources and higher quantum efficiency, and is considered to have the potential to replace TiO 2 one of the materials. ZnO is a kind of abundant raw material, environment-friendly semiconductor material with wide bandgap (E g ≈3.3eV), under the irradiation of ultraviolet light, it can generate holes and electrons with strong redox ability. Therefore, ZnO theoretically has the same 2 similar photocatalytic ability. However, due to the rapid...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/00C02F1/30
CPCC02F1/30B01J27/24C02F2305/10C02F2101/308B01J35/396
Inventor 潘新花周宇嵩吕斌叶志镇
Owner ZHEJIANG UNIV
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