Preparation method of quartz sand/titanium dioxide composite catalyst

A composite catalyst, titanium dioxide technology, used in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of low pollutant degradation efficiency, easy to ignore the interaction between pollutants and catalysts, etc.

Inactive Publication Date: 2021-04-27
SICHUAN COLLEGE OF ARCHITECTURAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the commonly used method to prepare quartz sand / titanium dioxide composite catalysts is easy to ignore the interaction between pollutants and catalysts, and the degradation efficiency of pollutants is still low.

Method used

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  • Preparation method of quartz sand/titanium dioxide composite catalyst
  • Preparation method of quartz sand/titanium dioxide composite catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of quartz sand / titanium dioxide composite catalyst, comprising the following steps,

[0029] Step 1: Pretreatment; Weigh 10mL of tetrabutyl titanate, add it dropwise into deionized water at a speed of 0.10ml / s-0.20ml / s, stir while dripping, and add nitric acid, tetrabutyl titanate, The addition of deionized water and nitric acid is mixed according to the mass ratio of 11%: 88%: 0.8%, to obtain a milky white suspension;

[0030] Step 2: water bath; stir the suspension in a water bath at 50°C for 1 hour to obtain a light blue titanium dioxide sol;

[0031] Step 3: mixing; taking the titanium dioxide sol and diluting it with water, adding quartz sand into the titanium dioxide sol, the mass ratio of the added quartz sand to titanium dioxide is 2.5%;

[0032] Step 4: drying; drying the mixture in an oven at 105°C to constant weight to obtain solid particles;

[0033] Step 5: hydrothermal treatment: put the solid particles in a hydrothermal reaction ket...

Embodiment 2

[0035] The preparation method of the quartz sand / titania composite catalyst of present embodiment 2 comprises the following steps,

[0036] Step 1: Pretreatment; Weigh 10mL of tetrabutyl titanate, add it dropwise into deionized water at a speed of 0.10ml / s-0.20ml / s, stir while dripping, and add nitric acid, tetrabutyl titanate, The addition of deionized water and nitric acid is mixed according to the mass ratio of 11%: 88%: 0.8%, to obtain a milky white suspension;

[0037] Step 2: water bath; stir the suspension in a water bath at 50°C for 1 hour to obtain a light blue titanium dioxide sol;

[0038] Step 3: mixing; taking the titanium dioxide sol and diluting it with water, adding quartz sand into the titanium dioxide sol, the mass ratio of the added quartz sand to titanium dioxide is 5.0%;

[0039] Step 4: drying; drying the mixture in an oven at 105°C to constant weight to obtain solid particles;

[0040] Step 5: hydrothermal treatment: put the solid particles in a hydrot...

Embodiment 3

[0042] The preparation method of the quartz sand / titania composite catalyst of present embodiment 3 comprises the following steps,

[0043]Step 1: Pretreatment; Weigh 10mL of tetrabutyl titanate, add it dropwise into deionized water at a speed of 0.10ml / s-0.20ml / s, stir while dripping, and add nitric acid, tetrabutyl titanate, The addition of deionized water and nitric acid is mixed according to the mass ratio of 11%: 88%: 0.8%, to obtain a milky white suspension;

[0044] Step 2: water bath; stir the suspension in a water bath at 50°C for 1 hour to obtain a light blue titanium dioxide sol;

[0045] Step 3: mixing; take the titanium dioxide sol and add water to dilute, add quartz sand to the titanium dioxide sol, and add the mass ratio of quartz sand to titanium dioxide to be 7.5%;

[0046] Step 4: drying; drying the mixture in an oven at 105°C to constant weight to obtain solid particles;

[0047] Step 5: hydrothermal treatment: put the solid particles in a hydrothermal rea...

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Abstract

The invention discloses a preparation method of a quartz sand/titanium dioxide composite catalyst. The invention aims to solve the problem of low photocatalytic degradation efficiency of a composite catalyst prepared in the prior art. The preparation method comprises the following steps: 1, weighing tetrabutyl titanate, adding tetrabutyl titanate into deionized water according to a set mass ratio, and adding nitric acid to obtain a suspension; 2, stirring the suspension in a water bath for 1 h to obtain sol; 3, diluting the titanium dioxide sol with water, and adding quartz sand into the titanium dioxide sol according to a set mass ratio; 4, drying a mixture obtained in the previous step in a drying oven to constant weight so as to obtain solid particles; and 5, putting the solid particles into a hydrothermal reaction kettle, naturally cooling the solid particles to room temperature after a reaction, and then conducting filtering and drying to obtain the catalyst, wherein the addition amount of the quartz sand is 2.0%-10.0% of the mass of the titanium dioxide and the mass of the composite catalyst, and the temperature of hydrothermal treatment is 100 DEG C to 200 DEG C. The method has the advantages of improving photocatalytic degradation efficiency and the like.

Description

technical field [0001] The invention relates to the technical field of composite catalyst preparation, in particular to a preparation method of a quartz sand / titanium dioxide composite catalyst. Background technique [0002] Since Fujishima and Honda discovered the light-induced decomposition of water on titanium dioxide electrodes, titanium dioxide, a semiconductor photocatalytic material, has been extensively studied in the field of pollutant treatment due to its high efficiency, non-toxicity, and high chemical stability. There are still few reports on the large-scale engineering application of titanium dioxide for pollution control. The main reason is that nano-titanium dioxide is easy to agglomerate. In order to achieve engineering-grade degradation efficiency, it is necessary to increase the amount of titanium dioxide. It will lead to an increase in the cost of pollution control, thereby limiting the wide application of titanium dioxide. Titanium dioxide immobilization...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/16B01J21/06B01J37/10B01J37/03B01J35/10B01D53/72B01D53/86
CPCB01J21/16B01J21/063B01J37/10B01J37/036B01J35/004B01J35/109B01D53/8668B01D2257/708
Inventor 廖刚
Owner SICHUAN COLLEGE OF ARCHITECTURAL TECH
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