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Preparation and application of (TiO2-ZrO2-SiO2)@inverse opal structure SiO2 catalyst

An anti-opal structure and catalyst technology, applied in the field of inorganic non-metallic materials, can solve the problems of TiO2 grain growth, influence on crystallinity, pore size shrinkage, etc., and achieve good photocatalytic degradation performance, improved efficiency, and high mechanical strength.

Pending Publication Date: 2020-06-05
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Using this method to prepare inverse opal-structured TiO 2 The ordered structure of is easily destroyed during the removal of the templating agent, and the pore size will shrink to a large extent
Moreover, the organic matter will affect the TiO during the removal process. 2 The crystallinity and crystal phase, if prolonging the calcination time to completely remove the organic template, will make TiO 2 grain growth

Method used

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  • Preparation and application of (TiO2-ZrO2-SiO2)@inverse opal structure SiO2 catalyst
  • Preparation and application of (TiO2-ZrO2-SiO2)@inverse opal structure SiO2 catalyst

Examples

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Embodiment 1

[0028] A (TiO 2 -ZrO 2 -SiO 2 )@inverse opal structure SiO 2 Composite photocatalyst preparation process, the specific process is as follows:

[0029] Step 1: Inverse Opal SiO 2 preparation. Measure 2 mL of tetraethyl orthosilicate, and then according to the volume ratio of each raw material: tetraethyl orthosilicate: absolute ethanol: deionized water: ammonia water = 2:8:5:0.1, mix the raw materials and continue to stir until they are mixed After the solution is clarified, SiO 2 Sol. Measure a certain amount of SiO 2 Sol and polystyrene emulsion mixed. The volume ratio of the two is SiO 2 Sol:polystyrene emulsion=1:3. Pour it into a crystallization dish after ultrasonication for 30 minutes, and place it in a 40°C oven for deposition. Finally, the inverse opal structure SiO can be obtained by removing the polystyrene template 2 spare.

[0030] Step 2: preparation of titanium silicon zirconium sol. Under the condition of continuous magnetic stirring, dissolve zircon...

Embodiment 2

[0037] A (TiO 2 -ZrO 2 -SiO 2 )@inverse opal structure SiO 2 The preparation process of the composite photocatalyst is the same as in Example 1 except that the immersion time is different.

[0038] In this embodiment: the immersion time is 1h.

Embodiment 3

[0040] A (TiO 2 -ZrO 2 -SiO 2 )@inverse opal structure SiO 2 Composite photocatalyst preparation process, except that heat treatment temperature is different, all the other are the same as embodiment 1.

[0041] In this embodiment: the heat treatment temperature is 700°C.

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Abstract

The invention discloses preparation and application of a (TiO2-ZrO2-SiO2)@inverse opal structure SiO2 catalyst. Zirconium oxychloride octahydrate, tetraethoxysilane and titanium sulfate are used as starting materials to prepare titanium-silicon-zirconium sol, and the titanium-silicon-zirconium sol is filled into inverse opal structure SiO2 prepared in advance through a suction filtration method. Finally, the titanium-silicon-zirconium sol@inverse opal structure SiO2 compound is subjected to a heat treatment in a muffle furnace to obtain the TiO2-ZrO2-SiO2@inverse opal structure SiO2 catalyst.The photocatalytic activity of the prepared catalyst is characterized by the degradation rate of rhodamine B. Due to the synergistic effect of the porous and ordered inverse opal structure and different oxides, the prepared TiO2-ZrO2-SiO2-inverse@opal structure SiO2 composite photocatalyst has very good adsorption and photo-catalysis properties at the same time, and the pollutant degradation efficiency is greatly improved. The catalyst has the characteristics of simple process, short period, low energy consumption and low cost.

Description

technical field [0001] The invention belongs to the technical field of inorganic non-metallic materials, and relates to a method for preparing a core-shell three-dimensional ordered inverse opal structure powder, in particular to a (TiO 2 -ZrO 2 -SiO 2 )@inverse opal structure SiO 2 Catalyst preparation and application. Background technique [0002] TiO has been 2 Due to its excellent characteristics, powder has always been a hot spot for scientists to study. It has the characteristics of low cost, environmental friendliness, good physical and chemical stability, and is a material with great potential for photocatalytic degradation of organic pollutants. Due to the pure phase of TiO 2 The powder has a wide band gap, low utilization rate of visible light, small specific surface area, severe agglomeration, and difficult recycling, which affect its application in the field of environmental governance. Nowadays, more and more researchers are focusing their work on TiO 2 R...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/08B01J35/10C02F1/30C02F1/28
CPCB01J21/08C02F1/30C02F1/281C02F2305/10C02F2101/308B01J35/39B01J35/651
Inventor 伍媛婷常小靖李旭刘长青薛云龙
Owner SHAANXI UNIV OF SCI & TECH
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