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A kind of 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: 2018-01-26
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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  • A kind of preparation method of cu:zno/n:rgo composite photocatalyst
  • A kind of preparation method of cu:zno/n:rgo composite photocatalyst
  • A kind of preparation method of cu:zno/n:rgo composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) 0.659g Zn(CH 3 COOH) 2 2H 2 O, 0.42g HMTA, 6mg Cu(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 in step (2) is placed in a quartz boat, and the NH 3 10% NH by volume 3 Mixed gas with Ar, then heated up to 200°C at a rate of 20°C / min, and 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 obtain a Cu:ZnO / N...

Embodiment 2

[0033] (1) 0.659g Zn(CH 3 COOH) 2 2H 2 O, 0.42g HMTA, 12mg Cu(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;

[0034] (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.

[0035] (3) Place the Cu:ZnO / rGO powder prepared in step (2) in a quartz boat and pass through NH for 5 min 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 obtain ...

Embodiment 3

[0037] (1) 0.659g Zn(CH 3 COOH) 2 2H 2 O, 0.42g HMTA, 18mg Cu(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;

[0038] (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.

[0039] (3) Place the Cu:ZnO / rGO powder prepared in step (2) in a quartz boat and pass through NH for 5 min 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...

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Abstract

The invention discloses a method for preparing a p-n junction type Cu:ZnO / N:rGO composite photocatalyst composed of Cu-doped ZnO nanorods and N-doped reduced graphene oxide (rGO). The catalyst is composed of N-doped reduced graphene oxide (rGO). It consists of n-type rGO coated with Cu-doped p-type ZnO nanorods. The preparation method is as follows: first use a hydrothermal method to prepare Cu-doped ZnO nanorods, and then assemble them with graphene oxide (GO) using a hydrothermal reduction method to form a Cu:ZnO / rGO composite photocatalyst. Finally, Cu :ZnO / rGO is annealed in an NH3 atmosphere and doped with N to obtain a Cu:ZnO / N:rGO composite photocatalyst. The photocatalyst prepared by this method has high photocatalytic activity under ultraviolet light, and can inhibit the photocorrosion phenomenon of ZnO, greatly improving the stability of the catalyst, and has important potential application value 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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Patent Type & Authority Patents(China)
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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