Preparation method of indium selenide/titanium dioxide nanosheet composite material

A composite material and titanium dioxide technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve problems such as low efficiency, high process requirements, and complicated preparation methods, and achieve good crystallinity, The effect of high purity and simple preparation method

Pending Publication Date: 2020-10-30
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, at present, the preparation method of combining indium selenide and titanium dioxide is complicated and the process requirements are relatively high. Most importantly, the efficiency of catalytic conversion of carbon dioxide into methane by indium selenide / titanium dioxide composites is not high

Method used

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  • Preparation method of indium selenide/titanium dioxide nanosheet composite material
  • Preparation method of indium selenide/titanium dioxide nanosheet composite material

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Embodiment 1

[0024] This embodiment provides a controllable preparation method of indium selenide / titanium dioxide nanosheet composite material, comprising the following steps:

[0025] Step 1, preparing an indium selenide precursor by a hydrothermal method;

[0026] Put 1mmol of indium acetate and 40mL of water into the reaction kettle, stir until the indium acetate is completely dissolved, then add 1mmol of selenium powder, stir until evenly dispersed, then add 40mL of ethylenediamine, react at 140°C for 40h, cool to room temperature after the reaction, After being collected by centrifugation, they were washed with ethanol and water in sequence, and freeze-dried to obtain the precursor powder.

[0027] Step 2, carrying out in-situ hydrolysis of n-butyl titanate on the precursor;

[0028] The indium selenide precursor was ultrasonically dispersed in 50 mL of absolute ethanol, 0.1 mmol of n-butyl titanate was added under nitrogen protection, and then 7 μL of water was added under stirring...

Embodiment 2

[0032] This embodiment provides a controllable preparation method of indium selenide / titanium dioxide nanosheet composite material, comprising the following steps:

[0033] Step 1, preparing an indium selenide precursor by a hydrothermal method;

[0034] Put 2mmol of indium acetate and 50mL of water into the reaction kettle, stir until the indium acetate is completely dissolved, then add 3mmol of selenium powder, stir until it is evenly dispersed, then add 20mL of ethylenediamine, react at 150°C for 50h, cool to room temperature after the reaction, After being collected by centrifugation, they were washed with ethanol and water in sequence, and freeze-dried to obtain the precursor powder.

[0035] Step 2, carrying out in-situ hydrolysis of n-butyl titanate on the precursor;

[0036] The indium selenide precursor was ultrasonically dispersed in 80 mL of absolute ethanol, 0.3 mmol of n-butyl titanate was added under nitrogen protection, and then 15 μL of water was added under s...

Embodiment 3

[0041] This embodiment provides a method for controlling the preparation of an indium selenide / titanium dioxide nanosheet composite material, comprising the following steps:

[0042] Step 1, preparing an indium selenide precursor by a hydrothermal method;

[0043] Put 3mmol of indium acetate and 60mL of water into the reaction kettle, stir until the indium acetate is completely dissolved, add 4.5mmol of selenium powder, stir until evenly dispersed, add 30mL of ethylenediamine, react at 160°C for 65h, cool to room temperature after the reaction , collected by centrifugation, washed with ethanol and water in turn, and freeze-dried to obtain the precursor powder.

[0044] Step 2, carrying out in-situ hydrolysis of n-butyl titanate on the precursor;

[0045] The indium selenide precursor was ultrasonically dispersed in 100 mL of absolute ethanol, 0.5 mmol of n-butyl titanate was added under nitrogen protection, and then 30 μL of water was added under stirring to hydrolyze n-butyl...

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Abstract

The invention provides a preparation method of an indium selenide / titanium dioxide nanosheet composite material. The method adopts a crystallization-in-situ hydrolysis-crystallization three-step process, and specifically comprises the following steps of: acquiring an indium selenide precursor by a hydrothermal method, carrying out in-situ hydrolysis on tetrabutyl titanate on the precursor, and then performing calcining to obtain the indium selenide / titanium dioxide nanosheet composite material. According to the method, the pure-phase indium selenide / titanium dioxide composite nanosheet material is obtained through several simple steps under the condition that a conductive substrate is not used, the obtained product is good in crystallinity and high in purity, and the used preparation method has the advantages of environmental friendiness, simple operation, high controllability and the like.

Description

technical field [0001] The invention belongs to the technical field of synthesis of environment-friendly nanometer materials, and relates to a controllable preparation method of indium selenide / titanium dioxide nanosheet composite material. Background technique [0002] Due to their unique physical and chemical properties, selenide metal semiconductor nanomaterials have broad application prospects in many fields such as energy, medicine, and sensors. Among them, indium selenide (In 2 Se 3 ) is an important III-VI direct bandgap semiconductor material with an obvious layered structure. In its crystal structure, there are strong covalent bonds in the layer and weak van der Waals interactions between the layers, and it has a high degree of anisotropy, electrical , optics and magnetism, catalysis and gas sensitivity and other properties, these advantages make indium selenide have applications in solar cells, lithium-ion batteries, phase change memory, catalysis and photoelectr...

Claims

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Application Information

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IPC IPC(8): B01J27/057
CPCB01J27/0573B01J35/39Y02P20/52
Inventor 韦丁甘云丹严文荣梁磊赵晓梅
Owner XIAN MODERN CHEM RES INST
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