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Preparation and application of bismuth oxychloride as photocatalyst

A photocatalyst, bismuth oxychloride technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of long period of preparation process of bismuth oxychloride, small specific surface area of ​​particles, complicated process, etc. , to achieve the effects of low cost, good dispersibility and simple preparation process

Inactive Publication Date: 2011-12-21
TAIYUAN UNIV OF TECH
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  • Description
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  • Application Information

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 analytical 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 9mL of urea solution and slowly dropwise add Na 2 CO 3 Solution, control the pH value at 7, and stir the reaction time for 1 hour;

[0025] 3) The suspension solution obtained in step 2) is filtered, and the solid phase product obtained is washed with distilled water, and then dried at a temperature of 50° C. to obtain a 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 blowing from the bottom of the reactor. Sampling and analysis were taken every certain time interval, and the conversion rate of methyl orange was measured by ultra...

Embodiment approach 2

[0033] 1) Weigh 1 gram of analytical 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 3mL of urea solution and slowly add Na dropwise 2 CO 3 Solution, the pH value is controlled at 11, stirring reaction time 1.2 hours;

[0035] 3) The suspension solution obtained in step 2) is filtered, and the solid phase product obtained is washed with distilled water, and then dried at a temperature of 50° C. to obtain a 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 blowing from the bottom of the reactor. Sampling and analysis were taken every certain time interval, and the conversion rate of phenol was measured by ultraviole...

Embodiment approach 3

[0040] 1) Weigh 1 gram of analytical 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 dropwise add Na 2 CO 3 Solution, control the pH value at 9, and stir the reaction time for 1.1 hours;

[0042] 3) The suspension solution obtained in step 2) is filtered, and the solid phase product obtained is washed with distilled water, and then dried at a temperature of 80° C. to obtain a 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 blowing from the bottom of the reactor. Sampling and analysis were taken every certain time interval, and the conversion rate of humic acid was measured by ultra...

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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, and belongs to the technical field of environmental chemical photocatalytic water treatment. Specifically, it discloses a method for preparing a novel photocatalyst bismuth oxychloride and a technical solution for its application in the oxidation treatment of organic matter in water. Background technique [0002] Bismuth oxychloride is an inorganic synthetic material that 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 a non-toxic and good color. The production process Simple, low production cost, and good compatibility with organic matrix (Handbook of non-ferrous metal extraction metallurgy, Beijing: Metallurgical Industry Press, 1992, 423-428). From the related literature (JP2005137526; CN1730568A; US20020222844; Zhu Li...

Claims

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Application Information

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Patent Type & Authority Patents(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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