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Method for growing titanium dioxide particles on base material

A titanium dioxide and base material technology, applied in the field of photocatalysts, can solve the problems of reduced photocatalytic efficiency, easy fall off of catalysts, and long preparation time, and achieve the effects of wide selection range, low cost of raw materials, and simple preparation methods

Inactive Publication Date: 2017-01-11
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The methods provided by these patent documents either use dipping and pulling, or high-temperature heating, or use sol-gel methods, which have long preparation time, complicated operations, and many pharmaceutical reagents used. The materials have high temperature resistance requirements, and the catalyst is easy to fall off.
If the sticky method is adopted, the colloid has a wrapping effect on the catalyst, which greatly reduces the photocatalytic efficiency.

Method used

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  • Method for growing titanium dioxide particles on base material
  • Method for growing titanium dioxide particles on base material
  • Method for growing titanium dioxide particles on base material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Cut the plant fiber non-woven fabric with a composition of 90% into a size of 6cm×20cm, ultrasonically clean the non-woven fabric with alcohol and deionized water and dry it at 60°C;

[0045] (2) Slowly add 4 mL of tetra-n-butyl titanate dropwise into 40 mL of hydrochloric acid (the molar ratio of hydrogen chloride and deionized water is 1:30), stir while adding dropwise, and stir until the solution is clear to obtain a hydrothermal reaction solution;

[0046] (3) Put the non-woven fabric into a 50mL reaction kettle, pour 40mL of hydrothermal reaction solution;

[0047] (4) Put the reaction kettle into the oven, set the temperature to 90°C, and hold the temperature for 10 hours;

[0048] (5) The obtained non-woven fabric is washed with deionized water several times, and dried at 60°C, and the obtained titanium dioxide particles are as follows: figure 1 shown.

[0049] The titanium dioxide particle prepared in this embodiment is a rutile phase, and the XRD pattern ...

Embodiment 2

[0053] (1) Cut the non-woven fabric with 80% plant fiber into 6cm×20cm size, clean the non-woven fabric ultrasonically with alcohol and deionized water and dry it at 60°C;

[0054] (2) Slowly add 3 mL of tetra-n-butyl titanate dropwise into 40 mL of hydrochloric acid (the molar ratio of hydrogen chloride and deionized water is 1:60), stir while adding dropwise, and stir until the solution is clear to obtain a hydrothermal reaction solution;

[0055] (3) Put the non-woven fabric into a 50mL reaction kettle, pour 40mL of hydrothermal reaction solution;

[0056] (4) Put the reaction kettle into the oven, set the temperature to 100°C, and hold the temperature for 9 hours;

[0057] (5) The obtained non-woven fabric is washed with deionized water several times, and dried at 60°C, and the obtained titanium dioxide particles are as follows: figure 2 shown.

[0058] The titanium dioxide particles prepared in this example are anatase phase, and the XRD pattern of the titanium dioxide...

Embodiment 3

[0060] (1) Cut the non-woven fabric with 70% plant fiber into 6cm×20cm size, clean the non-woven fabric ultrasonically with alcohol and deionized water and dry it at 60°C;

[0061] (2) Slowly add 4 mL of tetra-n-butyl titanate dropwise into 40 mL of hydrochloric acid (the molar ratio of hydrogen chloride and deionized water is 1:45), stir while adding dropwise, and stir until the solution is clear to obtain a hydrothermal reaction solution;

[0062] (3) Put the non-woven fabric into a 50mL reaction kettle, pour 40mL of hydrothermal reaction solution;

[0063] (4) Put the reaction kettle into the oven, set the temperature to 90°C, and hold the temperature for 9 hours;

[0064] (5) The obtained non-woven fabric is washed with deionized water several times, and dried at 60°C, and the obtained titanium dioxide particles are as follows: image 3 shown.

[0065] The titanium dioxide particle prepared in this example is a mixed crystal form of anatase and rutile, and the XRD patter...

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Abstract

The invention discloses a method for growing titanium dioxide particles on a base material. The method includes the steps that 1, acid liquor and a titanium containing compound are mixed and stirred uniformly to obtain hydrothermal reaction liquid; 2, the base material is put in the hydrothermal reaction liquid, hydrothermal reaction is carried out at the temperature of 70-120 DEG C, and the titanium dioxide particles grow on the base material. The acid liquor is at least one of hydrochloric acid solution, nitric acid solution, sulfuric acid solution and hydrofluoric acid solution. The titanium containing compound is tetra-n-butyl titanate and / or isopropyl titanate. The size of the titanium containing compound accounts for 3-14% of the hydrothermal reaction liquid. The preparing method for growing the titanium dioxide particles on the base material is simple, the raw materials are easy to obtain, titanium dioxide firmly grows on the base material, and the crystal form and size of the titanium dioxide particles can be controlled to obtain high photocatalytic efficiency.

Description

technical field [0001] The invention relates to the technical field of photocatalysts, in particular to a method for growing titanium dioxide particles on a substrate. Background technique [0002] Titanium dioxide is an N-type semiconductor material with stable chemical properties, safe and non-toxic, and cheap and easy to obtain. It has a wide range of applications in the field of photocatalysis. In 1972, Japan's Fujishima and Honda reported in the Nature magazine that they found TiO in the light radiation 2 In a battery composed of semiconductor electrodes and metal electrodes, the oxidation-reduction reaction of water can continue to occur, generating H 2 . This discovery is very meaningful, indicating that light energy can be converted into chemical energy through semiconductor electrodes. Under the irradiation of ultraviolet light, titanium dioxide absorbs photons, and the electrons on the valence band are excited to the conduction band, generating negatively charge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01J31/38B01J37/10
CPCB01J21/18B01J31/38B01J37/10B01J35/39
Inventor 张溪文董培梅
Owner ZHEJIANG UNIV
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