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Method for preparing nanometer titanium dioxide coated nanometer silicon dioxide film

A nano-silicon dioxide and nano-titanium dioxide technology is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc. Simple equipment and easy large-scale industrial production

Inactive Publication Date: 2012-04-18
上海久安水质稳定剂厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nano-titanium dioxide and nano-silicon dioxide have many excellent properties and broad application prospects, but pure nano-silicon dioxide does not have many excellent properties of nano-titania

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 1. Under the conditions of stirring and ultrasonic waves, slowly add 6.7ml tetraethyl orthosilicate dropwise to 7ml absolute ethanol solution; after 30 minutes, add 1ml concentrated HNO dropwise 3 Add deionized water dropwise after 20 minutes to obtain solution 1, and continue to stir for use;

[0015] 2. Next, under the action of ultrasound and stirring, slowly add 23.8ml of butyl titanate dropwise to 36ml of absolute ethanol solution; after 30 minutes, add dropwise 5ml of concentrated HNO 3 ; Add 15ml of absolute ethanol and 10ml of deionized water dropwise after 20 minutes to obtain solution 2, continue to stir for later use;

[0016] 3. After 30 minutes, under the action of ultrasound and stirring, slowly add solution 1 to solution 2 dropwise, and continue stirring for 2.5 hours to obtain a white colloidal solution;

[0017] 4. Coat the solution on a glass or transparent plastic plate, and dry to obtain a nano-titanium dioxide-coated nano-silicon dioxide film.

Embodiment 2

[0019] 1. Under the conditions of stirring and ultrasonic waves, slowly add 5ml of ethyl orthosilicate dropwise to 6ml of absolute ethanol solution; after 30 minutes, add 1ml of concentrated HCl dropwise; after 30 minutes, add dropwise 3.5ml of deionized water , to obtain solution 1, continue to stir for later use;

[0020] 2. Next, under the condition of ultrasonic wave and stirring, slowly add 22ml of butyl titanate into 33ml of absolute ethanol solution dropwise; after 40 minutes, add 4ml of concentrated HCl dropwise; after 25 minutes, add dropwise of 13ml of absolute ethanol and 9ml Deionized water, to obtain solution 2, continue to stir for later use;

[0021] 3. After 40 minutes, under the action of ultrasound and stirring, slowly add solution 1 to solution 2 dropwise, and continue stirring for 3 hours to obtain a white colloidal solution;

[0022] 4. Coat the solution on a glass or transparent plastic plate, and dry to obtain a nano-titanium dioxide-coated nano-silicon...

Embodiment 3

[0024] 1. Under the conditions of stirring and ultrasonic waves, slowly add 8ml of tetraethyl orthosilicate dropwise to 8.2ml of absolute ethanol solution; after 40 minutes, add 0.5ml of concentrated H 2 SO 4 Add 5ml deionized water dropwise after 30 minutes to obtain solution 1, continue to stir for later use;

[0025] 2. Next, under the action of ultrasound and stirring, slowly add 25ml of butyl titanate dropwise into 38ml of absolute ethanol solution; after 20 minutes, add 3ml of concentrated H 2 SO 4 Add 18ml of absolute ethanol and 12ml of deionized water dropwise after 30 minutes to obtain solution 2, continue to stir for later use;

[0026] 3. After 25 minutes, under the action of ultrasound and stirring, slowly add solution 1 to solution 2 dropwise, and continue stirring for 2 hours to obtain a white colloidal solution;

[0027] 4. Coat the solution on a glass or transparent plastic plate, and dry to obtain a nano-titanium dioxide-coated nano-silicon dioxide film. ...

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PUM

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Abstract

The invention discloses a method for preparing a nanometer titanium dioxide coated nanometer silicon dioxide film, which comprises the following steps of: slowly dripping 5 to 20ml of tetraethoxysilane into an absolute ethanol solution under the conditions of stirring and ultrasonic waves; dripping inorganic acid after 20 to 40 minutes; dripping 5 to 25ml of deionized water after 10 to 30 minutes to obtain a solution 1; slowly dripping 15 to 40ml of butyl titanate into 20 to 50ml of absolute ethanol solution under the action of the ultrasonic waves and under the condition of stirring; dripping 2 to 10ml of inorganic acid after 15 to 30 minutes; dripping 10 to 30ml of absolute ethanol and 5 to 15ml of deionized water after 15 to 30 minutes to obtain a solution 2; slowly dripping the solution 1 into the solution 2 under the action of the ultrasonic waves and under the condition of stirring after 20 to 40 minutes, and continuously stirring for 2 to 3 hours to obtain a white colloidal solution; and coating the solution on a glass or transparent plastic plate / pipe to obtain the nanometer titanium dioxide coated nanometer silicon dioxide film. The film can be used for sterilization, organic gas degradation, wastewater treatment and the like under visible light.

Description

technical field [0001] The invention relates to the fields of photochemical catalyst, electrochemical catalyst, organic synthesis, fine product chemical industry and the like, in particular to a preparation method of a nanometer silicon dioxide film coated with nanometer titanium dioxide. Background technique [0002] When nano-titanium dioxide is irradiated by sunlight or ultraviolet rays from fluorescent lamps, the internal electrons will be excited. As a result, negatively charged electrons and positively charged holes are generated. The electrons reduce the oxygen in the air or water to generate hydrogen peroxide, and the holes act in the direction of oxidizing the water molecules on the surface to generate radical atoms. These are active oxygen, which have a strong oxidative decomposition ability, so that they can decompose and remove various organic substances attached to the surface of titanium oxide. Titanium dioxide not only has a strong ability to oxidize and dec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/08B01J35/02B01J35/00
Inventor 罗年均郝玉凤孙晓珑
Owner 上海久安水质稳定剂厂
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