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Preparation method of visible light responded WO3/{001}TiO2 composite photocatalyst

A composite light and catalyst technology, applied in the field of photocatalytic material research, to achieve the effect of promoting complete hydrolysis, simple preparation process, and inhibiting polymerization

Inactive Publication Date: 2015-04-01
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of photocatalysts with excellent visible light response at low temperature is still a research bottleneck.

Method used

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  • Preparation method of visible light responded WO3/{001}TiO2 composite photocatalyst
  • Preparation method of visible light responded WO3/{001}TiO2 composite photocatalyst
  • Preparation method of visible light responded WO3/{001}TiO2 composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] with WO 3 with TiO 2 The molar ratio is 1:1 as an example, the preparation of the WO 3 / {001}TiO 2 The method of composite photocatalyst is realized by the following steps:

[0024] (1)﹛001﹜Anatase TiO with exposed facets 2 Single crystal preparation

[0025] ① Measure 30.4mL of absolute ethanol and add it to 35.2mL of butyl titanate, so that the molar ratio of butyl titanate and absolute ethanol is 1:5, mix well, and then prepare a mixed solution of A;

[0026] ② Measure 180mL of deionized water, add 20.2mL of HF, make the molar ratio of HF and deionized water is 1:22, and mix well to obtain the B mixture;

[0027] ③Add the mixed solution of A to the mixed solution of B dropwise, and the dropping speed is controlled at 3 drops per second, so that the molar ratio of butyl titanate in the mixed solution of A to the deionized water in the mixed solution of B is 1:100 , mixed at low speed for 2 hours to obtain TiO 2 Sol, aged at room temperature for 48 hours;

[00...

Embodiment 2

[0033] with WO 3 with TiO 2 The molar ratio is 1:10 as an example, the preparation of the WO 3 / {001}TiO 2 The method of composite photocatalyst is realized by the following steps:

[0034] (1)﹛001﹜Anatase TiO with exposed facets 2 Single crystal preparation

[0035] ① Measure 30.4mL of absolute ethanol and add it to 35.2mL of butyl titanate, so that the molar ratio of butyl titanate and absolute ethanol is 1:5, mix well, and then prepare a mixed solution of A;

[0036] ② Measure 180mL of deionized water, add 20.2mL of HF, make the molar ratio of HF and deionized water is 1:22, and mix well to obtain the B mixture;

[0037] ③Add the mixed solution of A to the mixed solution of B dropwise, the dropping speed is controlled at 2 drops per second, so that the molar ratio of butyl titanate in the mixed solution of A to the deionized water in the mixed solution of B is 1:105 , mixed at low speed for 1 hour to obtain TiO 2 Sol, aging at room temperature for 24 hours;

[0038]...

Embodiment 3

[0043] with WO 3 with TiO 2 The molar ratio is 1:100 as an example, the preparation of the WO 3 / {001}TiO 2 The method of composite photocatalyst is realized by the following steps:

[0044] (1)﹛001﹜Anatase TiO with exposed facets 2 Single crystal preparation

[0045] ① Measure 30.4mL of absolute ethanol and add it to 35.2mL of butyl titanate, so that the molar ratio of butyl titanate and absolute ethanol is 1:10, mix well, and then prepare a mixed solution of A;

[0046] ② Measure 185mL of deionized water, add 20.2mL of HF, make the molar ratio of HF and deionized water is 1:20, and mix well to obtain the B mixture;

[0047] ③Add the mixed solution of A to the mixed solution of B dropwise, and the dropping speed is controlled at 2 drops per second, so that the molar ratio of butyl titanate in the mixed solution of A to the deionized water in the mixed solution of B is 1:150 , mixed at low speed for 1 hour to obtain TiO 2 The sol was aged for 36 hours at room temperatur...

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Abstract

The invention relates to a preparation method of visible light responded WO3 / {001}TiO2 composite photocatalyst. The preparation method comprises the following steps: by adopting an improved sol-gel method, firstly preparing {001} surface-exposed anatase TiO2 at room temperature, then depositing a certain amount of WO3 on the surface of the anatase TiO2 to construct a WO3 / {001}TiO2 composite system. according to the preparation method, the {001} surface-exposed anatase TiO2 is prepared by adopting the simple sol-gel method, so that the original preparation concept of inhibiting the hydrolysis of a titanium-containing precursor can be changed, the amount of water is increased to promote the complete hydrolysis of butyl titanate and inhibit the polymerization, the original feeding sequence is changed, butyl titanate is dropwise added into an HF water solution, uniform {001} surface-exposed anatase TiO2 can be formed at room temperature, the preparation technology is simple, the reaction conditions are mild, the reaction speed is easily controlled, the cost is low, and the preparation method is suitable for industrial popularization and application.

Description

technical field [0001] The invention relates to the technical field of photocatalytic materials research, in particular to a visible light-responsive WO 3 / {001}TiO 2 Preparation method of composite photocatalyst. Background technique [0002] TiO 2 Due to the advantages of strong oxidation ability, high catalytic activity, stable physical and chemical properties, low price, and non-toxicity, it is widely used in photocatalytic fields such as wastewater treatment, air purification, and sterilization and self-cleaning. [0003] The application of titanium dioxide is closely related to its crystal structure and surface properties. Studies have shown that three crystal forms of TiO 2 The order of relative photoactivity is: anatase (AT) >> rutile (RT) >> brookite (BT) type TiO 2 . Anatase TiO 2 The conventional preparation method is to add the mixed solution of deionized water and acid to the mixed solution of butyl phthalate and absolute ethanol, and the mola...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/30C02F1/30
CPCY02W10/37
Inventor 侯晨涛丁家国张倩云王炎罗婷婷同玲娜钟伟张思斯杜炎玲
Owner XIAN UNIV OF SCI & TECH
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