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Method for preparing novel porous structure photocatalyst

A porous structure and photocatalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problem of difficult separation and reuse of nano-sized titanium dioxide, the use of organic solvents and templates, and low catalytic efficiency etc. to achieve excellent photocatalytic activity, simple operation and high catalytic efficiency

Pending Publication Date: 2020-01-17
苏州羿白环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods inevitably use organic solvents and organic phase surfactants, and will encounter problems such as emission restrictions in the industrial production process
[0004] The preparation method of the novel porous structure photocatalyst in the prior art has problems such as difficult separation and reuse of nano-sized titanium dioxide, low catalytic efficiency, use of organic solvents and template agents, etc., so it is urgent to develop a preparation of a novel porous structure photocatalyst method

Method used

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  • Method for preparing novel porous structure photocatalyst
  • Method for preparing novel porous structure photocatalyst
  • Method for preparing novel porous structure photocatalyst

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Experimental program
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Effect test

Embodiment approach 1

[0030] Dissolve TiCl4 in 100ml deionized water to prepare a 0.5M aqueous solution. The mass ratio of the finally generated titanium dioxide is 20%, and the silicon dioxide with a particle diameter of 110 nanometers is added therein as a precursor, which is atomized into micron-sized droplets by an ultrasonic atomizer. Then the droplets enter the high-temperature quartz tubular reactor with the assistance of 500L / h air, the pyrolysis temperature is 800 degrees, and the product is collected by glass fiber membrane. After calcination at 450°C for 1 hour and etching with 10wt% hydrofluoric acid at room temperature, titanium dioxide microspheres with a porous structure were obtained with a specific surface area of ​​46.1m 2 / g.

Embodiment approach 2

[0032] Dissolve TiCl4 in 100ml deionized water to prepare a 0.5M aqueous solution. The mass ratio of the finally generated titanium dioxide is 20%, and the silicon dioxide with a particle size of 20 nanometers is added therein as a precursor, which is atomized into micron-sized droplets by an ultrasonic atomizer. Then the droplets enter the high-temperature quartz tubular reactor with the assistance of 500L / h air, the pyrolysis temperature is 600 degrees, and the product is collected by glass fiber membrane. After calcination at 450°C for 1 hour and etching with 10wt% hydrofluoric acid at room temperature, titanium dioxide microspheres with a porous structure were obtained with a specific surface area of ​​87.2m 2 / g.

Embodiment approach 3

[0034] Dissolve TiCl4 in 100ml deionized water to prepare a 0.5M aqueous solution. The mass ratio of the final titanium dioxide is 60%, and the silicon dioxide with a particle size of 20 nanometers is added therein as a precursor, which is atomized into micron-sized droplets by an ultrasonic atomizer. Then the droplet enters the quartz tubular reactor with the assistance of 500L / h air, the pyrolysis temperature is 400 degrees, and the product is collected by glass fiber membrane. After calcination at 450°C for 1 hour and etching with 10wt% hydrofluoric acid at room temperature, titanium dioxide microspheres with a porous structure were obtained with a specific surface area of ​​112.3m 2 / g.

[0035] Comparative sample 1

[0036] Dissolve TiCl4 in 100ml deionized water to prepare a 0.5M aqueous solution. Without adding a silica template, it is atomized into micron-sized droplets by an ultrasonic nebulizer. Then the droplets enter the high-temperature quartz tubular reactor ...

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Abstract

The invention belongs to the technical field of novel materials and in particular discloses a method for preparing a novel porous structure photocatalyst. The method for preparing the novel porous structure photocatalyst comprises the following steps: I, dissolving a titanium precursor into deionized water so as to prepare an aqueous solution of 0.5M; II, adding silica sol into the aqueous solution so as to obtain a precursor solution, performing atomization by using an ultrasonic atomizer so as to obtain micron-sized droplets, and taking silica microspheres of different sizes as hard templates; III, feeding the droplets into a high-temperature quartz tube reactor with the aid of a carrier gas, and collecting the product by using a glass fiber filter membrane; and IV, performing calciningfor 1 hour at 450 DEG C, and performing etching by using 10wt% hydrofluoric acid at room temperature, so as to obtain a titanium microsphere photocatalyst with a porous structure. By adopting the method, comprehensive effects that nano-sized titanium dioxide is separated and reused, the catalytic efficiency is high and industrial application can be achieved with use of organic solvents and template agents, can be achieved.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a preparation method of a novel porous structure photocatalyst. Background technique [0002] As the global economy continues to grow rapidly, environmental pollution and energy shortages are becoming increasingly serious. The treatment of harmful organic pollutants in water resources is one of the current research hotspots. Photocatalytic technology is a new green sewage treatment technology due to the use of solar energy to convert organic pollutants into harmless water and carbon dioxide. Since the pioneering work of Japanese scientists Fujishima and Honda on the photocatalytic properties of titanium dioxide semiconductor oxides in 1972, research on nano-titanium dioxide photocatalysis has attracted much attention. However, commercial nano-sized titanium dioxide particles have problems such as high cost and small size, which are difficult to separate and reuse, which l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J35/08B01J35/10C02F1/30C02F101/30
CPCB01J21/063C02F1/30C02F2101/308C02F2305/10C02F2101/40B01J35/60B01J35/51B01J35/39
Inventor 吴亮程起林方辉旺康选峰陈鹏姚晨晓曹馨雅陈萍胡灿夏碧云
Owner 苏州羿白环保科技有限公司