Preparation method of high-catalytic-activity loading type black titanium dioxide

A technology of black titanium dioxide and high catalytic activity, applied in the field of photocatalysis, can solve the problems of low adsorption performance of titanium dioxide, complex experimental materials, equipment, conditions, low adsorption performance, etc., to improve adsorption and photocatalysis, and facilitate industrial application. , the effect of increasing the number of holes

Inactive Publication Date: 2018-11-23
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the experimental raw materials, equipment and conditions required by these methods are extremely complicated, and the cost is high and the yield is low, so it is difficult to realize industrialization
[0003] As a photocatalytic material, titanium dioxide has a small specific surface area and low adsorption performance, and most studies use activated carbon, diatomaceous earth, zeolite and other materials as carriers to improve the adsorption performance of titanium dioxide, but the adsorption performance of titanium dioxide is limited.
[0004] Therefore, how to solve the low problem of titanium dioxide adsorption performance is a problem urgently needed by those skilled in the art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The batching ratio of anatase nano titanium dioxide and molecular sieve is 1:2, respectively 5g, 10g, water solvent 35g, that is, the solid mass concentration is 30%, then add 5g thiourea dioxide to the suspension, and adjust the pH to be 8, mix The uniform reaction system was put into a high-energy ball mill, and the ball milling time was 30 minutes. After ball milling, the reactants were washed twice with acetone as a detergent, and dried in an oven at 25°C.

[0030] TiO was detected by XRD characterization 2 anatase

[0031] Weigh 1g of composite photocatalyst, use 10mg / L methylene blue solution as target pollutant to carry out photocatalytic performance test, the degradation rate after 2h reaches 89.75%.

Embodiment 2

[0033] The batching ratio of anatase nano titanium dioxide and molecular sieve is 1:5, respectively 5g, 25g, water solvent 70g, that is, the solid mass concentration is 30%, then add 5g thiourea dioxide to the suspension, and adjust the pH to be 8, mix The uniform reaction system was put into a high-energy ball mill, and the ball milling time was 30 minutes. After ball milling, the reactant was washed twice with acetone as a detergent, and dried at 25°C.

[0034] TiO was detected by XRD characterization 2 anatase

[0035] Weigh 1g of composite photocatalyst, use 10mg / L methylene blue solution as the target pollutant to carry out photocatalytic performance test, the degradation rate after 2h reaches 80.69%.

Embodiment 3

[0037] The batching ratio of anatase nano titanium dioxide and molecular sieve is 1:9, respectively 5g, 45g, water solvent 117g, that is, the solid mass concentration is 30%, then add 5g thiourea dioxide to the suspension, and adjust the pH to be 8, mix The uniform reaction system was put into a high-energy ball mill, and the ball milling time was 30 minutes. After ball milling, the reactants were washed twice with acetone as a detergent, and dried in an oven at 25°C.

[0038] TiO was detected by XRD characterization 2 anatase

[0039] Weigh 1g of composite photocatalyst, use 10mg / L methylene blue solution as the target pollutant to carry out photocatalytic performance test, the degradation rate after 2h reaches 86.67%.

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Abstract

The invention discloses a preparation method of high-catalytic-activity loading type black titanium dioxide. The preparation method comprises the following steps that anatase nano titanium dioxide anda molecular sieve are subjected to compounding at the proportion of 1 to (2-9), and a compounding mixture is obtained; water serving as a solvent is blended with the compounding mixture at the proportion of 10-30% of the solid mass concentration, and suspension liquid is obtained; thiourea dioxide with the same mass as nano titanium dioxide is added into the suspension liquid; the pH value of thesuspension liquid is conditioned to be 8-9, a reaction system after being mixed is obtained; the reaction system is subjected to ball milling, and the ball milling time is 30-120 minutes; and the mixture after ball milling is completed is sieved, washed and dried, and the high-catalytic-activity loading type black titanium dioxide is obtained. The adsorption and the photocatalysis of titanium dioxide are effectively improved.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, more specifically to a method for preparing a highly catalytically active loaded black titanium dioxide. Background technique [0002] TiO 2 Since it was discovered by Japanese scientists Fujishima and Honda in 1972 that its single crystal electrode can be used to split water, its photocatalytic reaction mechanism, synthesis and modification methods have been extensively studied, but TiO 2 The bandgap width is large, and the light absorption wavelength range is narrow, so when used as a photocatalyst, the electron-hole pairs generated by ultraviolet light excitation are easy to recombine, resulting in low quantum yield and low solar energy utilization. Therefore, in recent years, researchers at home and abroad have devoted themselves to the preparation of modified TiO2 by ion doping, material recombination, photosensitization treatment, noble metal deposition, oxidation, reduction and oth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/00B01J20/06B01J20/28B01J20/30
CPCB01J20/06B01J20/28019B01J29/00B01J35/004B01J37/04B01J37/16B01J2229/18
Inventor 徐海陈田曾广斌让-皮埃尔·索维奇马里奥·莫利纳
Owner CENT SOUTH UNIV
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