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Environment-friendly indium oxide hydro-thermal synthesis method

An environmentally friendly, hydrothermal synthesis technology, applied in chemical instruments and methods, gallium/indium/thallium compounds, inorganic chemistry, etc., can solve the problems of surfactant loss, product loss, high cost, and reduce surfactants. churn, product loss reduction, emission reduction effect

Active Publication Date: 2013-04-03
河南圣玛斯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the yield is low, the average yield is 70.61%, and the cost is too high
On the other hand, during the hydrothermal synthesis of indium oxide, the product yield is less than 80%, and In 3+ Ion hydrolysis to generate In(OH) 3 , for In(OH) 3 During the separation process, some products will be separated with the filtrate and washing liquid, resulting in product loss and surfactant loss, and improper handling will cause environmental pollution

Method used

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  • Environment-friendly indium oxide hydro-thermal synthesis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1). Preparation of precursor indium hydroxide

[0022] a. Under magnetic stirring conditions, in 70.00ml deionized water, add 0.5006g surfactant and 0.8006g InCl 3 4H 2 O, keep stirring to make it evenly dispersed, add 0.5000g solid NaOH, stir to dissolve it, obtain a uniform solution, continue to stir for 25 minutes,

[0023] b. Then move to a polytetrafluoroethylene container, seal it in a stainless steel autoclave, heat and react at 220°C for 20 hours, then cool to room temperature,

[0024] c. The product is separated by centrifugation and washed, and the precipitate is dried and ground to obtain indium hydroxide In(OH) 3 ;

[0025] (2). Preparation of environmentally friendly indium oxide

[0026] Indium hydroxide In(OH) obtained by drying and grinding 3 Calcined at 500°C for 2 hours to obtain cubic indium oxide;

[0027] The filtrate after the centrifugation in the step (1) enters the filtrate storage tank, the sample after the centrifugation is washed t...

Embodiment 2

[0029] (1). Preparation of precursor indium hydroxide

[0030] a. Under magnetic stirring conditions, in 80.00ml deionized water, add 0.8004g surfactant and 0.9008g InCl 3 4H 2 O, keep stirring to make it uniformly dispersed, add 0.8000g solid NaOH and stir to dissolve it, obtain a uniform solution, continue to stir for 30 minutes,

[0031] b. Then move to a polytetrafluoroethylene container, seal it in a stainless steel autoclave, heat and react at 230°C for 18 hours, then cool to room temperature,

[0032] c. The product is separated by centrifugation and washed, and the precipitate is dried and ground to obtain indium hydroxide In(OH) 3 ;

[0033] (2). Preparation of environmentally friendly indium oxide

[0034] Indium hydroxide In(OH) obtained by drying and grinding 3 Calcined at 550°C for 1.5 hours to obtain cubic indium oxide;

[0035] The filtrate after the centrifugation in the step (1) enters the filtrate storage tank, the sample after the centrifugation is ...

Embodiment 3

[0037] (1). Preparation of precursor indium hydroxide

[0038] a. Under the condition of magnetic stirring, in 85.00ml deionized water, add 1.0054g surfactant and 1.0001gInCl 3 4H 2 O, keep stirring to make it evenly dispersed, add 1.0000g of solid NaOH, stir to make it dissolve, obtain a uniform solution, continue to stir for 35 minutes,

[0039] b. Then move to a polytetrafluoroethylene container, seal it in a stainless steel autoclave, heat and react at 250°C for 16 hours, then cool to room temperature,

[0040] c. The product is separated by centrifugation and washed, and the precipitate is dried and ground to obtain indium hydroxide In(OH) 3 ;

[0041] (2). Preparation of environmentally friendly indium oxide

[0042] Indium hydroxide In(OH) obtained by drying and grinding 3 Calcined at 600°C for 1 hour to obtain cubic indium oxide;

[0043]The filtrate after the centrifugation in the step (1) enters the filtrate storage tank, the sample after the centrifugation ...

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Abstract

The invention discloses an environment-friendly indium oxide hydro-thermal synthesis method which comprises the following steps of: (1) preparing an indium hydroxide precursor, namely a, adding a surfactant and an indium salt into deionized water under magnetic stirring conditions, continuously stirring for uniformly dispersing, adding excessive solid alkali to ensure that the pH value is 8-10 after reaction, stirring to obtain a uniform solution, and continuously stirring for 25-35 minutes; b, transferring to a polytetrafluoroethylene container, sealing in a stainless steel high-pressure reactor, heating, reacting and cooling to room temperature; and c, centrifuging and separating the products and washing, drying the precipitate, and grinding to prepare indium hydroxide In(OH)3; and (2) preparing the environment-friendly indium oxide, namely calcining the indium hydroxide In(OH)3 prepared by drying and grinding at the temperature of 500-600 DEG C for 1-2 hours, and preparing the cubic form indium oxide.

Description

technical field [0001] The invention belongs to the field of preparation of environment-friendly indium oxide, and in particular relates to a method for preparing environment-friendly indium oxide by a hydrothermal method. Background technique [0002] Indium oxide is a special wide bandgap oxide semiconductor with low resistance and high catalytic activity. It has been widely used in solar cells, flat panel displays, optical and optoelectronic devices, and gas sensors. Environmentally friendly indium oxide nanoparticles have good application prospects in optical switches and visible light beam limiters; the application of ITO thin films in liquid crystal displays makes semiconductor indium oxide electrically close to the conductivity of metals; as a new type of gas-sensitive material , due to its small resistance, high sensitivity, especially the improvement of sensitivity to small molecular gases after doping with noble metals, the reduction of working temperature, and...

Claims

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Application Information

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IPC IPC(8): C01G15/00
Inventor 王晓华孙兰轩
Owner 河南圣玛斯科技有限公司
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