Preparation and application of bismuth oxychloride as photocatalyst

A technology of photocatalyst and bismuth oxychloride, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of long production cycle of bismuth oxychloride, small specific surface area of ​​particles, complex process, etc. , to achieve the effects of low cost, good dispersion and simple preparation process

Inactive Publication Date: 2010-11-10
TAIYUAN UNIV OF TECH
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  • Description
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the preparation and application of a photocatalyst bismuth oxychloride is to disclose the preparation of a bismuth oxychloride photocatalyst for the shortcomings of long preparation process cycle, complex process, large energy consumption, and small specific surface area of ​​particles. The method is applied to the treatment of organic matter in water. The preparation method uses bismuth trichloride as a raw material, dilute hydrochloric acid as a hydrolysis agent, and sodium carbonate as a pH regulator. , under normal temperature and pressure, a bismuth oxychloride photocatalyst with large specific surface area and uniform fine particles was prepared, which improved the ability of photocatalytic oxidation to treat organic matter in water

Method used

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  • Preparation and application of bismuth oxychloride as photocatalyst
  • Preparation and application of bismuth oxychloride as photocatalyst
  • Preparation and application of bismuth oxychloride as photocatalyst

Examples

Experimental program
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Effect test

Embodiment approach 1

[0023] 1) Weigh 1 gram of analytically pure BiCl 3 placed in 0.1mol·L -1 Dilute hydrochloric acid 50mL, make BiCl 3 Fully dissolve and keep the solution in a transparent state;

[0024] 2) Add 0.1mol·L under magnetic stirring -1 urea solution 9mL and slowly drop Na 2 CO 3 solution, the pH value is controlled at 7, and the stirring reaction time is 1 hour;

[0025] 3) Filtrating the suspension solution obtained in step 2), washing the obtained solid phase product with distilled water, and then drying at a temperature of 50° C. to obtain the bismuth oxychloride photocatalyst.

[0026] The obtained photocatalyst is used for oxidation treatment of methyl orange aqueous solution. The reaction conditions are: normal temperature and pressure, 50 mL of 10 mg / L methyl orange aqueous solution, 0.8 g / L of photocatalyst, and air is blown from the bottom of the reactor. Sample analysis was taken at regular intervals, and the conversion rate of methyl orange was measured by UV-Vis sp...

Embodiment approach 2

[0033] 1) Weigh 1 gram of analytically pure BiCl 3 placed in 0.1mol·L -1 Dilute hydrochloric acid 50mL, make BiCl 3 Fully dissolve and keep the solution in a transparent state;

[0034] 2) Add 0.1mol·L under magnetic stirring -1 urea solution 3mL and slowly drop Na 2 CO 3 solution, the pH value was controlled at 11, and the stirring reaction time was 1.2 hours;

[0035] 3) Filtrating the suspension solution obtained in step 2), washing the obtained solid phase product with distilled water, and then drying at a temperature of 50° C. to obtain the bismuth oxychloride photocatalyst.

[0036] The obtained photocatalyst is used for oxidation treatment of methyl orange aqueous solution. The reaction conditions are: normal temperature and pressure, 50 mL of 10 mg / L methyl orange aqueous solution, 1.5 g / L of photocatalyst, and air is blown from the bottom of the reactor. Samples were taken and analyzed at regular intervals, and the conversion rate of phenol was measured by UV-V...

Embodiment approach 3

[0040] 1) Weigh 1 gram of analytically pure BiCl 3 placed in 0.1mol·L -1 Dilute hydrochloric acid 50mL, make BiCl 3 Fully dissolve and keep the solution in a transparent state;

[0041] 2) Add 0.1mol·L under magnetic stirring -1 5mL of urea solution and slowly add Na 2 CO 3 solution, the pH value was controlled at 9, and the stirring reaction time was 1.1 hours;

[0042] 3) Filtrating the suspension solution obtained in step 2), washing the obtained solid phase product with distilled water, and then drying at 80° C. to obtain the bismuth oxychloride photocatalyst.

[0043] The obtained photocatalyst is used for oxidation treatment of methyl orange aqueous solution. The reaction conditions are: normal temperature and pressure, 50 mL of 10 mg / L methyl orange aqueous solution, 2.0 g / L of photocatalyst, and air is blown from the bottom of the reactor. Samples were taken and analyzed at regular intervals, and the conversion rate of humic acid was measured by UV-Vis spectrophot...

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Abstract

The invention relates to the preparation and application of a bismuth oxychloride as photocatalyst, which belongs to the technical field of environmental and chemical photocatalytic water treatment. The invention adopts bismuth trichloride as material, diluted hydrochloric acid as hydrolytic agent and sodium carbonate as pH regulator to prepare the bismuth oxychloride photocatalyst under the atmospheric temperature and pressure by simple steps such as hydrolyzation, precipitation, solid-liquid separation and drying. The preparation method has the advantages of atmospheric temperature and pressure, simple, safe and controllable technique, easy industrialization, cheap and easily obtained materials and stable product performance. When the bismuth oxychloride photocatalyst is used for oxidating organic matters in water in a research, a result indicates that the bismuth oxychloride photocatalyst has high photocatalytic activity, and the bismuth oxychloride photocatalyst has the same effect as the commercialized P25 photocatalyst under the irradiation of sunlight and simulated sunlight, and a better photocatalytic effect than the commercialized P25 photocatalyst under the irradiation of ultraviolet light.

Description

technical field [0001] The invention relates to the preparation and application of a photocatalyst bismuth oxychloride, belonging to the technical field of environmental chemical photocatalytic water treatment. Specifically, it discloses a preparation method of a novel photocatalyst bismuth oxychloride and a technical scheme for its application in the oxidation treatment of organic matter in water. Background technique [0002] Bismuth oxychloride is an inorganic synthetic material, which is mostly used in the pigment market. It is a substitute for natural pearlescent pigments—pearl powder. Compared with other inorganic synthetic pearlescent pigments, bismuth oxychloride has non-toxic and good color. The production process Simple, low production cost, and better compatibility with organic substrates (Handbook of Nonferrous Metal Extraction Metallurgy, Beijing: Metallurgical Industry Press, 1992, 423-428). According to relevant documents (JP2005137526; CN1730568A; US20020222...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06C02F1/30C02F1/32C02F1/72C02F101/30
Inventor 樊彩梅史竹青侯红串李双志王韵芳丁光月
Owner TAIYUAN UNIV OF TECH
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