Preparation method and application of carbon mesh-coated mesoporous wo3/tio2 composite microspheres

A composite microsphere and mesoporous technology, used in the preparation of microspheres, microcapsule preparations, chemical instruments and methods, etc., can solve the problems of long preparation period, high temperature, complicated operation, etc., and achieve short preparation period and large specific surface area. , the effect of simple preparation process
CN106824170BActive Publication Date: 2019-09-03ZHEJIANG UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG UNIV OF TECH
Publication Date
2019-09-03

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Abstract

The invention discloses a carbon mesh-coated mesoporous WO 3 / TiO 2 Preparation method and application of composite microspheres. The preparation method includes the following steps: (1) Dissolve titanium source, tungsten source, carbon source, and complexing agent in deionized water, stir magnetically at 25-35°C for 6-24 hours, and then Use 2.5wt% to 2.8wt% ammonia water to adjust the pH to 7.0 to 8.0 to obtain a precursor solution. The obtained precursor solution is spray-dried to obtain a brown-yellow precursor powder; (2) The precursor prepared in step (1) The bulk powder is heated to 400-800°C under the protection of an inert atmosphere for high-temperature treatment. After high-temperature treatment, it is lowered to room temperature to obtain carbon mesh-coated mesoporous WO. 3 / TiO 2 Composite microspheres. The present invention provides the carbon mesh-coated mesoporous WO 3 / TiO 2 Application of composite microspheres as photocatalysts. The preparation method of the present invention has the advantages of simplicity, good controllability and repeatability, short preparation cycle, and ease of industrial mass production. The prepared composite photocatalyst has a large specific surface area, is fully absorbent in the visible light region, and is resistant to organic pollutants. Good adsorption and degradation performance.
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Description

[0001] (1) Technical field

[0002] The invention relates to a carbon mesh-coated mesoporous WO 3 / TiO 2 Preparation method of composite microsphere photocatalyst and its application as photocatalyst.

[0003] (2) Background technology

[0004] Due to TiO 2 With the advantages of strong oxidation ability, high catalytic activity, stable physical properties, low price and non-toxicity, it has become the most deeply researched photocatalytic material in the fields of sewage treatment, air purification, hydrogen production by photolysis of water, and solar cells. However, due to TiO 2 The bandgap width of solar energy is relatively large, and only ultraviolet light with higher energy can stimulate its photocatalytic activity, while ultraviolet light in sunlight only accounts for about 4.5%, resulting in a low utilization rate of sunlight. At the same time, TiO 2 The photogenerated electrons and holes are easy to recombine, which greatly reduces its photocatalytic efficiency. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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