Silver-silver phosphate-tungsten trioxide ternary composite nano photocatalytic material and preparation method and application thereof

A tungsten trioxide and ternary composite technology, which is applied in the field of photocatalysis, can solve the problems of limited application, poor stability, inability to be recycled for many times, photocorrosion and decomposition by light, etc., and achieves simple preparation method, short preparation time and low cost. Effect

Pending Publication Date: 2019-02-01
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, Ag 3 PO 4 It is prone to photocorrosion and decomposition when exposed to light. Due to its poor stability, it cannot be recycled many times, which greatly limits its application in actual production.

Method used

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  • Silver-silver phosphate-tungsten trioxide ternary composite nano photocatalytic material and preparation method and application thereof
  • Silver-silver phosphate-tungsten trioxide ternary composite nano photocatalytic material and preparation method and application thereof
  • Silver-silver phosphate-tungsten trioxide ternary composite nano photocatalytic material and preparation method and application thereof

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preparation example Construction

[0031] The invention provides a method for preparing a silver-silver phosphate-tungsten trioxide ternary composite nano photocatalytic material, comprising the following steps:

[0032] (1) Mix tungsten trioxide, polyvinylpyrrolidone and water for ultrasonic dispersion to obtain a suspension; add the silver acetate solution to the suspension for the first stirring treatment to obtain the first stirring liquid; add the phosphate solution to the Carrying out the second stirring treatment and solid-liquid separation successively in the first stirred liquid to obtain silver phosphate-tungsten trioxide composite particles;

[0033] (2) The silver phosphate-tungsten trioxide composite particles, silver nitrate and methanol aqueous solution are mixed and then subjected to ultraviolet light treatment to obtain a silver-silver phosphate-tungsten trioxide ternary composite nano photocatalytic material.

[0034] The present invention mixes tungsten trioxide, polyvinylpyrrolidone and wate...

Embodiment 1

[0054] (1) WO 3 Preparation: take 1.6gWCl 6 Added to 80mL ethanol to form a clear yellow solution. Put the solution into a 100mL reactor, heat it with water for 24 hours at a temperature of 160°C, cool it to room temperature, and form a blue flocculent precipitate, collect it, wash it with deionized water and ethanol three times, and dry it. Grind into powder and sinter in a muffle furnace for 1h, 500°C, 3°C / min to obtain WO 3 ;

[0055] (2) Silver phosphate-tungsten trioxide composite particles (Ag 3 PO 4 / WO 3 ) preparation: take 0.232gWO 3 Add 0.1g PVP into 50mL deionized water, ultrasonically disperse into a uniform suspension, add 1.503gAgAc into 20mL deionized water to dissolve evenly and fully, slowly add the suspension, and stir for 30min to make Ag + dispersed in WO 3 surface; 1.14g NaPO 4 12H 2 O(Ag + :PO 4 3+ =3:1) Add 25mL deionized water to dissolve, add dropwise to the suspension, stir for 5h, centrifuge, wash and dry, and obtain silver phosphate-tun...

Embodiment 2

[0064] (1) WO 3 Preparation: take 1.6gWCl 6 Added to 80ml of ethanol to form a clear yellow solution. Put the solution into a 100ml reaction kettle, heat it with water for 24 hours at a temperature of 160°C, cool it to room temperature, and form a blue flocculent precipitate, collect it, wash it with deionized water and ethanol three times, and dry it. Grind into powder and sinter in a muffle furnace for 1h, 500°C, 3°C / min to obtain WO 3 ;

[0065] (2) Silver phosphate-tungsten trioxide composite particles (Ag 3 PO 4 / WO 3 ) preparation: take 0.232gWO 3 Add 0.1g of PVP and 0.1g of PVP into 50ml of deionized water, ultrasonically disperse into a uniform suspension, add 1.002g of AgAc into 20ml of deionized water to dissolve evenly and fully, slowly add the suspension, and stir for 30min to make Ag + dispersed in WO 3 Surface 0.76gNaPO 4 12H 2 O(Ag + :PO 4 3+ =3:1) Add 25ml of deionized water to dissolve, add dropwise to the suspension, stir the suspension for 5h, c...

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Abstract

The invention provides a silver-silver phosphate-tungsten trioxide ternary composite nano photocatalytic material and a preparation method and application thereof, and belongs to the field of photocatalysis. Ag nanoparticles are loaded on the surface of Ag3PO4, the optical corrosion and decomposition of Ag3PO4 are effectively inhibited by utilizing a plasma resonance effect of the Ag nanoparticles, and thus stability of Ag3PO4 under illumination is guaranteed; introduction of WO3 can effectively inhibit recombination of photo-generated electron hole pairs, and the synergistic effect of Ag, Ag3PO4 and WO3 can effectively improve the photocatalytic performance of the composite material. The ternary composite nano photocatalytic material has the advantages of wide light response range and high quantum efficiency, and can be applied to the field of environmental protection, in particular to photocatalytic degradation of organic pollutants and photocatalytic sterilization.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to a silver-silver phosphate-tungsten trioxide ternary composite nano photocatalytic material and its preparation method and application. Background technique [0002] With the advancement of global science and technology and the development of industrial and agricultural production, the problem of water pollution has become increasingly serious. Among them, toxic organic pollutants and pathogenic microorganisms from industrial, agricultural and medical wastewater will infiltrate into groundwater if they cannot be treated in a timely and effective manner, causing serious harm to human health and the ecological environment. In recent years, semiconductor photocatalysis technology has shown obvious advantages in the field of environmental pollution control. Photocatalytic materials can destroy many structurally stable refractory organic pollutants, reduce heavy metal ions, deo...

Claims

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Application Information

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IPC IPC(8): B01J27/18B01J37/10B01J37/34A01N59/16A01P1/00C02F1/30C02F101/34
CPCA01N59/16C02F1/30B01J27/1817B01J37/10B01J37/345C02F2101/345C02F2305/10B01J35/23B01J35/39
Inventor 史慧贤梁海霞杨尚志黄晓波
Owner TAIYUAN UNIV OF TECH
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