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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  • Abstract
  • Description
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  • 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 po

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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Example Embodiment

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

[0032] (1) Mixing tungsten trioxide, polyvinylpyrrolidone and water for ultrasonic dispersion to obtain a suspension; adding silver acetate solution to the suspension for a first stirring treatment to obtain a first stirring solution; adding a phosphate solution to the suspension The second stirring treatment and solid-liquid separation are sequentially performed in the first stirring liquid to obtain silver phosphate-tungsten trioxide composite particles;

[0033] (2) The silver-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] In the present invention, tungsten trioxide, polyvinylpyr...

Example Embodiment

[0053] Example 1

[0054] (1)WO 3 Preparation: Take 1.6gWCl 6 Add to 80mL ethanol to form a clear yellow solution. The solution was put into a 100mL reaction kettle, hydrothermally heated for 24h, the hydrothermal temperature was 160°C, and cooled to room temperature to form a blue flocculent precipitate, collected, washed with deionized water and ethanol for 3 times, and dried. After grinding into powder, sintering in a muffle furnace for 1 hour, 500℃, 3℃ / 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 and 0.1g PVP into 50mL deionized water, ultrasonically disperse into a uniform suspension, add 1.503g AgAc into 20mL deionized water to evenly and fully dissolve, slowly add the suspension, stir for 30min to make Ag + Disperse in WO 3 Surface; 1.14gNaPO 4 ·12H 2 O(Ag + : PO 4 3+ =3:1) Dissolve in 25mL deionized water, add the suspension dropwise, stir and react for 5h, centrifuge, ...

Example Embodiment

[0063] Example 2

[0064] (1)WO 3 Preparation: Take 1.6gWCl 6 Add 80ml of ethanol to form a clear yellow solution. The solution was put into a 100ml reactor, hydrothermally heated for 24 hours, the hydrothermal temperature was 160°C, and cooled to room temperature to form a blue flocculent precipitate, collected, washed with deionized water and ethanol for 3 times, and dried. After grinding into powder, sintering in a muffle furnace for 1 hour, 500℃, 3℃ / 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 PVP and 0.1g PVP into 50ml deionized water, ultrasonically disperse into a uniform suspension, add 1.002g AgAc into 20ml deionized water to evenly and fully dissolve, slowly add the suspension, stir for 30min to make Ag + Disperse in WO 3 Surface 0.76gNaPO 4 ·12H 2 O(Ag + : PO 4 3+ =3:1) Dissolve in 25ml deionized water, add the suspension dropwise, stir the suspension for 5h, centrifuge,...

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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
CPCA01N59/16B01J27/1817B01J35/0013B01J35/004B01J37/10B01J37/345C02F1/30C02F2101/345C02F2305/10
Inventor 史慧贤梁海霞杨尚志黄晓波
Owner TAIYUAN UNIV OF TECH
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