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Zinc indium sulfide-nitrogen doped graphene foam composite photocatalytic material, and preparation method and application thereof

A nitrogen-doped graphene, composite photocatalysis technology, applied in catalyst activation/preparation, chemical instruments and methods, carbon dioxide reduction method preparation, etc., can solve the problem of low utilization rate, high photogenerated carrier recombination efficiency, and low catalytic activity. and other problems, to achieve the effect of no equipment, high photothermal conversion efficiency, and high photocatalytic activity

Active Publication Date: 2020-04-10
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, many research groups have successfully synthesized indium zinc sulfide photocatalysts and studied their photocatalytic activity (such as: L.Shi, P.Q.Yin, Y.M.Dai, Langmuir 2013, 29, 12818-12822; S.Adhikari, A.V.Charanpahari, G .Madras, ACS Omega 2017, 2, 6926-6938; J.G.Wang, Y.J.Chen, W.Zhou, G.H.Tian, ​​Y.T.Xiao, H.Y.Fu, H.G.Fu, ACS Omega 2017, 2, 6926-6938), however, a single Indium zinc sulfide semiconductor materials have high photogenerated carrier recombination efficiency and low utilization rate of light, resulting in low catalytic activity

Method used

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  • Zinc indium sulfide-nitrogen doped graphene foam composite photocatalytic material, and preparation method and application thereof
  • Zinc indium sulfide-nitrogen doped graphene foam composite photocatalytic material, and preparation method and application thereof
  • Zinc indium sulfide-nitrogen doped graphene foam composite photocatalytic material, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A preparation method of indium zinc sulfide-nitrogen-doped graphene composite photocatalytic material, the specific operations are as follows:

[0040] 1) Soak polyurethane sponge (length 2cm, width 2cm; height 2cm) in acetone solvent, place it in an ultrasonic cleaner for ultrasonication, then ultrasonically clean it with deionized water, and dry it for use.

[0041] 2) Put the impurity-removed polyurethane sponge obtained in step 1) into an ultraviolet irradiation machine and irradiate it for 30 minutes at a power of 100W, and cool it for use;

[0042] 3) disperse graphene oxide in a mixed solvent (ethanol volume ratio deionized water volume is 1:1), then place it in an ultrasonic cleaner for ultrasonic dispersion treatment to obtain a uniformly dispersed graphene oxide suspension (0.5mg / mL). Soak 1g of polyurethane sponge treated in step 2) in 50mL graphene oxide suspension, take out the sponge adsorbed with graphene oxide, dry and calcinate at 350°C for 10min to o...

Embodiment 2

[0059] A preparation method of indium zinc sulfide-nitrogen-doped graphene composite photocatalytic material, the specific operations are as follows:

[0060] 1) Soak polyurethane sponge (length 2cm, width 2cm; height 2cm) in acetone solvent, place it in an ultrasonic cleaner for ultrasonication, then ultrasonically clean it with deionized water, and dry it for use.

[0061] 2) Put the impurity-removed polyurethane sponge obtained in step 1) into an ultraviolet irradiation machine and irradiate it for 20 minutes at a power of 200W, and cool it for use;

[0062] 3) disperse graphene oxide in a mixed solvent (ethanol volume ratio deionized water volume is 1:9), then place it in an ultrasonic cleaner for ultrasonic dispersion treatment to obtain a uniformly dispersed graphene oxide suspension (0.5mg / mL). Soak 1g of polyurethane sponge treated in step 2) in 50mL graphene oxide suspension, take out the sponge adsorbed with graphene oxide, dry and calcinate at 350°C for 15min to o...

Embodiment 3

[0066] A preparation method of indium zinc sulfide-nitrogen-doped graphene composite photocatalytic material, the specific operations are as follows:

[0067] 1) Soak polyurethane sponge (length 2cm, width 2cm; height 2cm) in acetone solvent, place it in an ultrasonic cleaner for ultrasonication, then ultrasonically clean it with deionized water, and dry it for use.

[0068] 2) Put the impurity-removed polyurethane sponge obtained in step 1) into an ultraviolet irradiation machine and irradiate it for 20 minutes at a power of 250W, and cool it for use;

[0069] 3) disperse graphene oxide in a mixed solvent (ethanol volume ratio deionized water volume is 1:2), then place it in an ultrasonic cleaner for ultrasonic dispersion treatment to obtain a uniformly dispersed graphene oxide suspension (1.0mg / mL). Soak 1g of polyurethane sponge treated in step 2) in 50mL graphene oxide suspension, take out the sponge adsorbed with graphene oxide, dry and calcinate at 350°C for 20min to o...

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Abstract

The invention relates to a zinc indium sulfide-nitrogen doped graphene foam composite photocatalytic material, and a preparation method and an application thereof. The composite photocatalytic material comprises three-dimensional nitrogen-doped graphene foam and two-dimensional zinc indium sulfide nanosheets vertically arranged on the surface of the nitrogen-doped graphene foam. The preparation method comprises the following steps: carrying out hydrophilic treatment on polyurethane sponge, soaking the polyurethane sponge in a graphene oxide suspension, drying the foam, calcining the dried foam, and carrying out O2 plasma cleaning to obtain three-dimensional nitrogen-doped graphene foam; and then mixing the three-dimensional nitrogen-doped graphene foam with an inorganic zinc salt, an inorganic indium salt and a sulfur-containing organic matter, carrying out a hydrothermal reaction, and carrying out post-treatment to obtain the zinc indium sulfide-nitrogen doped graphene foam compositephotocatalytic material. The composite material shows excellent photocatalytic activity under the irradiation of simulated sunlight, has enough ultraviolet-visible-near-infrared light photothermal conversion efficiency, enhances the utilization efficiency of sunlight, and has a good catalytic effect when being used for photocatalytic reduction of carbon dioxide.

Description

technical field [0001] The invention relates to the technical field of synthesis of photocatalytic materials, in particular to an indium zinc sulfide-nitrogen-doped graphene foam composite photocatalytic material and its preparation method and application. Background technique [0002] With the rapid development of economy and society, energy and environmental issues are currently two major global problems that need to be solved urgently. Fujishima and Honda at TiO since 1972 2 Since the photoelectrocatalytic splitting of water to produce hydrogen and oxygen was realized on the electrode (A. Fujishima, K. Honda, Nature 1972, 238, 37.), this technology that can directly convert solar energy into chemical energy has received extensive attention. The photocatalytic process using semiconductors as catalysts has the advantages of direct use of sunlight, mild conditions, fast reaction speed, and no secondary pollution. extensive attention. Among many semiconductor photocatalyst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J27/04B01J35/00B01J37/02B01J37/10C07C1/02C07C9/04C07C29/15C07C31/04C01B32/40
CPCB01J27/24B01J27/04B01J37/0201B01J37/10C07C1/02C07C29/15C01B32/40B01J35/39C07C9/04C07C31/04Y02P20/52
Inventor 余家国夏阳
Owner WUHAN UNIV OF TECH
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