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Preparation method for visible-light-driven photocatalyst compositing bismuth oxychloride/silver carbonate

A technology of bismuth oxychloride and silver carbonate, applied in the field of photocatalysis, can solve the problems of reducing the photocatalytic activity of silver carbonate, and achieve the effects of easy control of preparation conditions, high catalytic efficiency and simple preparation method

Inactive Publication Date: 2016-02-03
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But since Ag 2 CO 3 / Ag reduction potential is 0.47eV, so pure silver carbonate can be easily reduced to elemental silver under visible light
The formation of elemental silver leads to the reduction of the photocatalytic activity of silver carbonate

Method used

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  • Preparation method for visible-light-driven photocatalyst compositing bismuth oxychloride/silver carbonate
  • Preparation method for visible-light-driven photocatalyst compositing bismuth oxychloride/silver carbonate
  • Preparation method for visible-light-driven photocatalyst compositing bismuth oxychloride/silver carbonate

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Experimental program
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Embodiment 1

[0019] (1) Preparation of bismuth oxychloride: measure 20mL of ethylene glycol and add 1.1184g of bismuth nitrate, then measure 20mL of ethylene glycol and add 0.3728g of potassium chloride, mix the above two solutions and stir for 1h. Transfer the solution in the reaction vessel to a hydrothermal reaction kettle, react at 150°C for 10 hours, cool, filter, wash and dry;

[0020] (2) Preparation of bismuth oxychloride / silver carbonate composite photocatalyst: Add 17 mg of bismuth oxychloride to 50 mL of distilled water, stir ultrasonically for 1 h, add 0.85 g of silver nitrate, stir for 30 min, then add 50 mL of 0.05 mol / L bicarbonate dropwise Sodium solution, stirred for 24 hours, centrifuged, washed with ethanol and water successively, and dried to obtain the product.

Embodiment 2

[0022] (1) Preparation of bismuth oxychloride: measure 70mL of ethylene glycol and add 6.9520g of bismuth nitrate, then measure 70mL of ethylene glycol and add 1.3904g of potassium chloride, stir the above two solutions for 2h after mixing, and The solution in the reaction vessel was transferred to a hydrothermal reaction kettle, reacted at 180°C for 14 hours, cooled, filtered, washed and dried;

[0023] (2) Preparation of bismuth oxychloride / silver carbonate composite photocatalyst: Add 68 mg of bismuth oxychloride to 100 mL of distilled water, stir ultrasonically for 3 h, add 1.70 g of silver nitrate, stir for 50 min, then add 100 mL of 0.05 mol / L bicarbonate dropwise Sodium solution, stirred for 28 hours, centrifuged, washed with ethanol and water successively, and dried to obtain the product.

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Abstract

The invention relates to a preparation method for a visible-light-driven photocatalyst compositing bismuth oxychloride / silver carbonate. The preparation method comprises the following steps: preparing bismuth oxychloride; adding bismuth oxychloride into distilled water, performing ultrasonic stirring, adding silver nitrate, performing stirring, adding a sodium bicarbonate solution dropwise, performing stirring, performing centrifugation, washing the product by ethanol and water in turn, and drying the product. The preparation method is simple, and the preparation condition is easy to control. Moreover, the prepared visible-light-driven photocatalyst compositing bismuth oxychloride / silver carbonate is a green catalyst with high performance, is pollution-free, has high catalytic efficiency, and has a certain application value.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and relates to a preparation method of bismuth oxychloride / silver carbonate composite visible light catalyst. Background technique [0002] Silver carbonate is the latest report of a new type of silver salt semiconductor with visible light catalytic activity. Its band gap is 2.30eV, its valence band potential is 2.673eV, and its conduction band potential is 0.373eV. Due to its narrow band gap, it can absorb visible light. Moreover, its valence band potential has a strong oxidation ability, so it is an ideal visible light catalyst. But since Ag 2 CO 3 The / Ag reduction potential is 0.47eV, so pure silver carbonate can be easily reduced to elemental silver under visible light. The formation of elemental silver leads to the reduction of the photocatalytic activity of silver carbonate. To solve this problem, the heterojunction formed by combining silver carbonate with other semiconductors ...

Claims

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Application Information

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IPC IPC(8): B01J27/232C02F1/30C02F1/72C02F101/30
Inventor 李忠玉方姗姗丛田田梁倩徐松
Owner CHANGZHOU UNIV
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