Cobalt-modified bismuth tungstate composite photocatalyst, its preparation method and application thereof

A technology of bismuth tungstate and composite light, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve undisclosed morphological characteristics, the final product is difficult to have photocatalytic degradation effect, and the addition of raw materials Incorrect order and other problems, to achieve the effect of scientific preparation method, good visible light catalytic degradation effect, and good stability
CN102764659AInactive Publication Date: 2012-11-07HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Publication Date
2012-11-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a cobalt-modified bismuth tungstate composite photocatalyst, its preparation method and an application thereof. Bismuth tungstate in the catalyst is granules with the particle size being 0.5-3 microns and the catalyst is composed of bismuth tungstate pieces, the length of which is 30-100 nm and the thickness of which is 5-10 nm. Cobalt oxide granules with the particle size being 10-100 nm are modified on the bismuth tungstate pieces. The specific surface area of the catalyst is 5-20m<2> / g. The preparation method comprises the following steps of: respectively adding bismuth nitrate into a nitric acid solution with stirring to obtain a bismuth nitrate solution and adding cetyl trimethyl ammonium bromide into a sodium tungstate solution with stirring to obtain a mixed solution, adding the bismuth nitrate solution into the mixed solution, placing in an enclosed state, keeping warm at 160-180 DEG C for 20-24 h, centrifuging, washing, drying to obtain a bismuth tungstate powder, adding the bismuth tungstate powder into a cobaltite solution, stirring, drying, grinding into a powder, and roasting the powder to prepare the target product. The product can be used in water polluted by organic matters or heavy metal ions to perform visible light photodegradation.
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Description

technical field

[0001] The invention relates to a photocatalyst and its preparation method and application, in particular to a cobalt-modified bismuth tungstate composite photocatalyst and its preparation method and application. Background technique

[0002] The global environmental pollution problem restricts the progress of human civilization, and the elimination of environmental organic pollutants needs to consume a lot of energy, which poses a severe challenge to the increasingly depleted energy. The use of photocatalytic technology to degrade environmental pollutants has the advantages of low energy consumption, mild reaction conditions, easy operation, and can reduce secondary pollution, so it has attracted more and more attention. In recent years, a large number of studies have shown that almost all organic pollutants can be effectively degraded, decolorized, detoxified, and mineralized into small inorganic molecules by semiconductor photocatalysis, thereby eliminatin...

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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