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Preparation method of nanometer composite N-doped graphene-ZnIn2S4 material

A nanocomposite material, -znin2s4 technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of low quantum efficiency, narrow energy band gap, low photocatalytic quantum efficiency, etc. To achieve the effect of simple process, improving photocatalytic efficiency, and broadening the absorption range of visible light

Inactive Publication Date: 2015-07-22
HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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AI Technical Summary

Problems solved by technology

Most of the photocatalytic materials currently used have problems such as low quantum efficiency and no photocatalytic activity under visible light. The development of highly efficient visible light catalytic materials has very important scientific significance and huge industrial application prospects.
Ternary sulfide ZnIn 2 S 4 (Eg=2.3eV) has a narrow energy band gap and good chemical stability, and is considered to be an ideal visible light catalyst, but pure ZnIn 2 S 4 Photocatalytic quantum efficiency is low

Method used

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Examples

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Effect test

preparation example Construction

[0019] A visible light responsive N-doped graphene-ZnIn of the present invention 2 S 4 The preparation method of nanocomposite material, comprises the following steps:

[0020] (1) Ultrasonic dispersion of graphite oxide and urea in reducing alcohol, the concentration of graphite oxide, urea and reducing alcohol is 1mg: (5-15mg): 2mL, and the ultrasonic time is 40-60 minutes;

[0021] (2) Transfer the reaction system of step (1) to a hydrothermal kettle for solvothermal reaction, the reaction temperature is 140-180°C, and the reaction time is 10-24 hours;

[0022] (3) Pour the product of step (2) into a vacuum filtration device for suction filtration, wash with deionized water, and obtain N-doped graphene after vacuum drying, the drying temperature is 60 ° C, and the time is 12 hours;

[0023] (4) ultrasonically disperse N-doped graphene in reducing alcohol, and the ultrasonic time is 40-60 minutes;

[0024] (5) Zinc sulfate and indium chloride were dissolved in equal volum...

Embodiment 1

[0029] Embodiment 1: A visible light responsive N-doped graphene-ZnIn of the present invention 2 S 4 The preparation method of nanocomposite material, comprises the following steps:

[0030] (1) Preparation of graphite oxide. Add 2g of graphite powder to potassium persulfate (1g) and concentrated sulfuric acid solution (15mL) of phosphorus pentoxide (1g) at 80°C, pre-oxidize for 6 hours, then cool to room temperature, filter with suction, and wash until neutral. Add pre-oxidized graphite powder (2g) to 50mL of concentrated sulfuric acid solution at 0°C, then slowly add 6g of potassium permanganate, then react at 35°C for 2 hours, and finally slowly add 100mL of deionized water and 20mL of 30% hydrogen peroxide terminated the reaction, suction filtered, washed, and dialyzed to obtain graphite oxide;

[0031] (2) 52 mg of graphite oxide and 520 mg of urea were placed in 100 mL of ethanol for ultrasonic dispersion for 60 minutes;

[0032] (3) Transfer the reaction system of s...

Embodiment 2

[0039] Embodiment 2: N-doped graphene-ZnIn responsive to visible light of the present invention 2 S 4 The preparation method of nanocomposite material, comprises the following steps:

[0040] (1) with the step (1) in the implementation example 1;

[0041] (2) 52 mg of graphite oxide and 520 mg of urea were placed in 100 mL of methanol for ultrasonic dispersion for 60 minutes;

[0042] (3) with step (3) in the implementation example 1;

[0043] (4) with the step (4) in the implementation example 1;

[0044] (5) 26mg of N-doped graphene was placed in 50mL of methanol for ultrasonic dispersion for 60 minutes;

[0045] (6) 1.176g of zinc sulfate and 2.4968g of indium chloride were dissolved in 50mL of methanol respectively, and stirred for 30 minutes;

[0046] (7) with the step (7) in the implementation example 1;

[0047] (8) with the step (8) in the implementation example 1;

[0048] (9) with the step (9) in the implementation example 1;

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Abstract

The invention discloses a preparation method of a nanometer composite N-doped graphene-ZnIn2S4 material responded by visible light. The preparation method comprises the following steps: placing graphite oxide and urea in a reducing alcohol agent for ultrasonic dispersion, then transferring the graphite oxide and the urea after the ultrasonic dispersion to a hydrothermal reaction kettle for reaction, performing vacuum filtration, washing and vacuum drying on a product so as to obtain N-doped graphene, adding the N-doped graphene to the reducing alcohol agent for the ultrasonic dispersion, adding zinc sulfate and indium chloride to the reducing alcohol agent to be stirred and dissolved, then mixing two kinds of systems, adding thioacetamide, then transferring the mixture of the systems and the thioacetamide to the hydrothermal reaction kettle for reaction, and performing vacuum filtration, washing and vacuum drying on the product so as to obtain nanometer composite N-doped grapene-ZnIn2S4 material. According to the preparation method disclosed by the invention, the N-doped graphene is used as a carrier material, and the nanometer composite N-doped graphene-ZnIn2S4 material is prepared by using a solvent thermal synthesis method in two steps.

Description

technical field [0001] The invention belongs to the technical field of new materials and their preparation, and relates to a visible light responsive N-doped graphene-ZnIn 2 S 4 Preparation methods of nanocomposites. technical background [0002] In the 21st century, all countries in the world are facing energy crisis and environmental pollution problems. Photocatalytic technology provides new ideas for solving the above problems and has attracted widespread attention. Most of the photocatalytic materials currently used have problems such as low quantum efficiency and no photocatalytic activity under visible light. The development of highly efficient visible light catalytic materials has very important scientific significance and huge industrial application prospects. Ternary sulfide ZnIn 2 S 4 (Eg=2.3eV) has a narrow energy band gap and good chemical stability, and is considered to be an ideal visible light catalyst, but pure ZnIn 2 S 4 The photocatalytic quantum effi...

Claims

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Application Information

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IPC IPC(8): B01J27/24B82Y30/00B82Y40/00
Inventor 周民杰阎建辉张娜侯朝辉
Owner HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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