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A preparation method of tungsten trioxide for catalytic photodegradation of organic matter

A technology of tungsten trioxide and nano-tungsten trioxide, applied in chemical instruments and methods, tungsten oxide/tungsten hydroxide, separation methods, etc., can solve problems such as limiting the application of metal sulfides, catalyst failure, etc., to solve catalyst problems, low cost effect

Active Publication Date: 2021-01-15
SHENZHEN TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during photocatalysis, the sulfur element of metal sulfides will be oxidized by photogenerated holes during the photocatalytic process, resulting in the self-decomposition reaction of the catalyst, causing catalyst failure, which greatly limits the application of metal sulfides in photodegradation of organic matter.

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  • A preparation method of tungsten trioxide for catalytic photodegradation of organic matter

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Embodiment 1

[0030] Embodiment 1, this embodiment discloses a preparation method of tungsten trioxide for catalytic photodegradation of organic matter, the specific steps are as follows:

[0031] 1) Under the protection of an inert gas, the alkali metal is completely dissolved in a solvent to obtain an alkali metal solution, wherein the solvent is an organic solvent or liquid ammonia;

[0032] 2) Under the protection of an inert gas, according to parts by weight, disperse 1 part by weight of nano-tungsten trioxide particles in the alkali metal solution of step 1) in 1-10 parts by weight, and stir for 6-10 days to obtain a solid-liquid mixture ;

[0033] 3) The solid-liquid mixture in step 2) is centrifuged, and the solid matter is pickled to remove the residual alkali metal solution on the surface, so as to obtain tungsten trioxide for catalytic photodegradation of organic matter.

[0034] In a specific embodiment, the alkali metal in step 1) is at least one of lithium, sodium, potassium,...

Embodiment 2

[0036] Embodiment 2, this embodiment discloses a preparation method of tungsten trioxide for catalytic photodegradation of organic matter, the specific steps are as follows:

[0037] 1) under the protection of an inert gas, according to the molar ratio metal lithium: ethylenediamine 1: 10, metal lithium is completely dissolved in ethylenediamine to obtain an alkali metal solution;

[0038] 2) Under the protection of an inert gas, according to parts by weight, at room temperature, disperse 1 part by weight of nano-tungsten trioxide particles in 1 part by weight of the alkali metal solution of step 1), and stir for 6 days to obtain a solid-liquid mixture ;

[0039] 3) The solid-liquid mixture in step 2) is centrifuged, and the solid matter is pickled to remove the residual alkali metal solution on the surface, so as to obtain tungsten trioxide for catalytic photodegradation of organic matter.

Embodiment 3

[0040] Embodiment 3, this embodiment discloses a preparation method of tungsten trioxide for catalytic photodegradation of organic matter, the specific steps are as follows:

[0041] 1) Under the protection of an inert gas, according to the molar ratio of calcium metal: liquid ammonia is 1:0.0002, calcium metal is completely dissolved in liquid ammonia to obtain an alkali metal solution;

[0042] 2) Under the protection of an inert gas, and under the condition of keeping liquid ammonia as a liquid (such as standard atmospheric pressure, -34°C), according to parts by weight, disperse 1 part by weight of nano-tungsten trioxide particles in 10 parts by weight 1) in the alkali metal solution, fully stirred for 8 days to obtain a solid-liquid mixture;

[0043] 3) The solid-liquid mixture in step 2) is centrifuged, and the solid matter is pickled to remove the residual alkali metal solution on the surface, so as to obtain tungsten trioxide for catalytic photodegradation of organic m...

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Abstract

The invention discloses a preparation method of tungsten trioxide for catalyzing and photodegradation of organic matters, and relates to the technical field of chemical catalysis. The preparation method comprises the following steps of enabling a tungsten solution and an acid solution to generate a precursor by a wet chemical precipitation method, and calcining the precursor, so as to obtain powdery nanometer tungsten trioxide particles; performing surface disordering treatment on the nanometer tungsten trioxide particles in a base metal solution, so as to obtain the tungsten trioxide crystalfor the catalyzing and photodegradation of the organic matters. The preparation method has the advantages that compared with the original tungsten trioxide particles without response to the visible light bands, the photocatalysis activity is realized on the visible light bands; the preparation method provided by the invention is efficient and feasible, the cost is low, and the problem of the catalyst at the visible light-near infrared band is effectively solved.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a preparation method of tungsten trioxide used for catalytic photodegradation of organic matter. Background technique [0002] With technological progress and industrial development, the accompanying environmental problems have become increasingly prominent. Among the many pollution sources, the use and discharge of organic matter is increasing year by year, becoming the main pollutant of environmental degradation. Statistical results show that the pollution of organic matter to groundwater and crops is long-term and difficult to remove, directly affecting human health and sustainable development of the ecosystem. Therefore, the degradation technology of organic pollutants has become a current technical hotspot and research direction, and has attracted the attention of many researchers. [0003] Among the many organic matter degradation technologies at present, the photodegra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/30B01D53/86C01G41/02B01D53/44
CPCB01D53/8687B01J23/30C01G41/02
Inventor 王吕阳张侃
Owner SHENZHEN TECH UNIV
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