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Preparation method of non-metal-doped titanium dioxide porous film with ordered pores

A titanium dioxide and porous film technology, applied in the field of titanium dioxide porous film preparation, can solve the problems of not considering the construction of pores, low order of pores, and not considering doping modification, etc.

Inactive Publication Date: 2014-02-05
GUANGXI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: (1) doping modification is not considered; (2) the hole order of the prepared titanium dioxide film is low
The shortcomings of this method are: (1) doping modification is not considered; (2) the construction of pores is not considered, even if the prepared titanium dioxide film is porous, the order of the pores is very low
This method obtains titanium oxide films with porous holes and ordered pores through templates, but this method does not consider the modification of titanium dioxide films.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment one: get 5g urea and be dissolved in ethanol, obtain the urea solution that concentration is 40% by weight; Get particle diameter and be that 40g of titanium dioxide nanoparticles of 20nm are dispersed in ethanol to obtain titanium dioxide dispersion liquid, titanium dioxide dispersion liquid is carried out after ultrasonic 10min ( Ultrasonic frequency 50kHz, power 100W), grinding for 60min to obtain a titanium dioxide dispersion system with a titanium dioxide concentration of 33.6% by weight; after mixing the prepared urea solution and titanium dioxide dispersion system evenly, obtain titanium dioxide flakes on conductive glass by scraping method, Dry the titanium dioxide flakes at a temperature of 40°C for 2 hours; heat the dried titanium dioxide flakes to 200°C under the conditions of a vacuum degree of 0.133KPa and a heating rate of 1°C / min, keep them warm for 1h, and then cool them under vacuum. A non-metal-doped titanium dioxide porous film with ordered ...

Embodiment 2

[0034] Example 2: Take 100ml of titanium dioxide sol with an average particle size of 10nm and a concentration of 80mg / ml and uniformly grind it as a titanium dioxide dispersion system (if the titanium dioxide sol used has been coagulated, it needs to be ground, otherwise it does not need to be ground); take 1g of ammonium oxalate Dissolve in the above-mentioned titanium dioxide dispersion system; obtain titanium dioxide flakes on the conductive glass by pulling, dry the titanium dioxide flakes at a temperature of 60°C for 1 hour, and then dry the dried titanium dioxide flakes in a vacuum degree of 0.1KPa and a heating rate of Heating to 220°C under the condition of 1.6°C / min, holding the temperature for 1h, and cooling under vacuum state to obtain a non-metal-doped titanium dioxide porous film with ordered pores. The average pore diameter of the titanium dioxide porous film is 500 nm.

Embodiment 3

[0035] Embodiment three: get 2g ammonium bicarbonate and 3g ammonium carbonate and dissolve in water, obtain the mixed solution that concentration is 10% by weight; Get particle diameter and be that 40g of titanium dioxide nanoparticles of 21nm are dispersed in water and obtain titanium dioxide dispersion liquid, carry out titanium dioxide dispersion liquid After ultrasonication for 10 minutes (ultrasonic frequency 60kHz, power 80W), grind for 90 minutes to obtain a titanium dioxide dispersion system with a titanium dioxide concentration of 40% by weight; after mixing the prepared mixed solution and titanium dioxide dispersion system evenly, spin coating on conductive glass to obtain Titanium dioxide flakes, dry the titanium dioxide flakes at 40°C for 2 hours; heat the dried titanium dioxide flakes to 100°C under the conditions of an absolute vacuum of 10KPa and a heating rate of 2°C / min, keep them warm for 1h, and then cool under vacuum , to obtain a non-metal-doped, hole-orde...

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PUM

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Abstract

The invention relates to a preparation method of a non-metal-doped titanium dioxide porous film with ordered pores. The preparation method comprises the following steps of: uniformly dispersing a reagent which is completely decomposed into gaseous substances NH3 and(or) CO and CO2 and titanium dioxide nano-particles or titanium dioxide soil into water or alcohol to prepare a dispersion system; preparing titanium dioxide slices by the prepared dispersion system through methods such as spin-coating, lifting, scraping or tabletting, and drying under a certain temperature; and thermally treating the dried titanium dioxide slices in a certain vacuum degree to control heat-up velocity to prepare the non-metal-doped titanium dioxide porous film with ordered pores. According to the preparation method disclosed by the invention, effective control of order and pore diameter of pores of the titanium dioxide porous film as well as effective doping of non-metal materials (N and C) is realized at the same time by controlling the amount of the reagent, the vacuum degree and the heat-up velocity during thermal treatment.

Description

technical field [0001] The invention relates to a method for preparing a titanium dioxide porous film, in particular to a method for preparing a non-metal doped porous titanium dioxide film with ordered holes. Background technique [0002] Due to its better light energy capture ability and better photogenerated carrier generation, separation and transfer ability, the hole-ordered titanium dioxide porous thin film material can be widely used in solar cells, solar photolysis hydrogen production, sensors and photocatalytic degradation. organic pollutants etc. Studies have shown that the higher the hole ordering degree of titanium dioxide porous film material, the better its solar light capture performance and photogenerated carrier transfer and transport performance. However, due to the wide band gap of titanium dioxide (titanium dioxide has two crystal forms: rutile and anatase, the former has a band gap of 3.0 eV and the latter is 3.2 eV), only ultraviolet light can be used....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/08
Inventor 盘荣俊
Owner GUANGXI UNIVERSITY OF TECHNOLOGY
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