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Preparation method and application of sulfur-doped antimony oxide visible light photocatalyst

A technology of photocatalyst and antimony oxide, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of limited application and large band gap, and achieve easy control, simple process, high The effect of high catalytic efficiency

Active Publication Date: 2014-07-02
福建科盛达科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Antimony oxide (Sb 2 o 3 ) is a new type of photocatalyst, which can effectively photocatalytically degrade organic pollutants, but due to its large band gap, as a photocatalyst, it only responds under ultraviolet light, which limits its application

Method used

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  • Preparation method and application of sulfur-doped antimony oxide visible light photocatalyst
  • Preparation method and application of sulfur-doped antimony oxide visible light photocatalyst
  • Preparation method and application of sulfur-doped antimony oxide visible light photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Preparation of nano-powder precursor solution:

[0024] 0.6844g SbCl 3 , 70ml of deionized water, 0.3005g of thioacetamide were stirred and mixed at room temperature, and the pH was adjusted to 12 by 4mol / L NaOH to obtain a nanopowder precursor.

[0025] (2) Preparation of nano powders under hydrothermal conditions:

[0026] Put the above-mentioned nano-powder precursor solution in a high-pressure reactor, heat it up to 120°C at a rate of 5°C / min and keep it warm for 12 hours for hydrothermal reaction. After the reaction is completed, naturally cool to room temperature and take it out. After washing with ethanol for 4 times, put it into a drying oven and dry at 70°C to obtain a sulfur-doped antimony oxide visible light photocatalyst.

[0027] The S-doped Sb prepared in this embodiment 2 o 3 The X-ray diffraction pattern of figure 1 shown.

[0028] The S-doped Sb prepared in this embodiment 2 o 3 The transmission electron microscope image is shown in Fig.

...

Embodiment 2

[0031] (1) Preparation of nano-powder precursor solution:

[0032] 0.6844g SbCl 3 , 70ml of deionized water, and 0.4007g of thioacetamide were stirred and mixed at room temperature, and the pH was adjusted to 12 by 5mol / L NaOH to obtain a nanopowder precursor.

[0033] (2) Preparation of nano powders under hydrothermal conditions:

[0034] Put the above-mentioned nano-powder precursor solution in a high-pressure reactor, heat it up to 140°C at a rate of 2°C / min and keep it warm for 12 hours for hydrothermal reaction. After washing with ethanol for 4 times, put it into a drying oven and dry at 60°C to obtain a sulfur-doped antimony oxide visible light photocatalyst.

Embodiment 3

[0036] (1) Preparation of nano-powder precursor solution:

[0037] 1.0266g SbCl 3 , 65ml of deionized water, and 0.3005g of thioacetamide were stirred and mixed at room temperature, and the pH was adjusted to 13 by 6mol / L NaOH to obtain a nanopowder precursor.

[0038] (2) Preparation of nano powders under hydrothermal conditions:

[0039] Put the above-mentioned nano-powder precursor solution in a high-pressure reactor, heat it up to 160°C at a rate of 3°C / min and keep it warm for 10 hours for hydrothermal reaction. After the reaction is completed, cool it down to room temperature naturally and take it out. After washing with ethanol for 5 times, put it into a drying oven and dry at 65°C to obtain a sulfur-doped antimony oxide visible light photocatalyst.

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Abstract

The invention discloses a hydrothermal preparation method of a sulfur-doped antimony oxide visible light photocatalyst. The preparation method comprises the following steps of stirring and mixing SbCl3, thioacetamide and deionized water at the room temperature, and regulating a pH value to 10-14 by virtue of 2-6mol / L NaOH, to obtain a nano-powder precursor; and arranging the nano-powder precursor in a high-pressure reactor, raising the temperature, preserving the heat and carrying out hydrothermal reaction, after completing the reaction, naturally cooling to the room temperature, taking out, washing with deionized water and absolute ethyl alcohol, then putting in a drying oven, and drying at the temperature of 60-80 DEG C, thus obtaining the sulfur-doped antimony oxide visible light photocatalyst. With the adoption of the preparation method, the preparation of antimony oxide nano-particles and the sulfur doping process are synchronously realized, and the preparation method is simple in the process, is easy to control and is suitable for industrial production and application. With the adoption of the prepared sulfur-doped antimony oxide visible light photocatalyst, the utilization rate of visible light is high, the catalytic efficiency is high, and the sulfur-doped antimony oxide visible light photocatalyst can be used for treating waste water containing organic pollutants.

Description

technical field [0001] The invention belongs to the field of catalyst preparation, in particular to a preparation method and application of sulfur-doped antimony oxide visible light photocatalyst. Background technique [0002] Antimony oxide (Sb 2 o 3 ) is a new type of photocatalyst that can effectively photocatalytically degrade organic pollutants, but due to its large band gap, as a photocatalyst, it only responds under ultraviolet light, which limits its application. Therefore, it is of great significance and application value to improve its performance, broaden the photoresponse range of antimony oxide and improve the photocatalytic efficiency of visible light. [0003] Through the addition of sulfur, oxygen vacancies are introduced into the antimony oxide lattice, or part of the oxygen vacancies are replaced by sulfur elements, so that the forbidden band of antimony oxide is narrowed, and impurity levels are introduced into the band gap, thereby absorbing visible lig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04C02F1/30C02F101/30
CPCY02W10/37
Inventor 薛珲陈庆华唐澍芬钱庆荣黄宝铨肖荔人许兢
Owner 福建科盛达科技有限公司
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