A kind of visible light responsive silver phosphate composite photocatalyst and its preparation and application

A technology of silver phosphate and compound light, which is applied in the field of photocatalytic materials, can solve the problems of preventing visible light absorption and reducing photocatalytic performance, and achieves the effects of large-scale production, abundant raw materials, and simple preparation methods

Active Publication Date: 2018-05-15
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The black silver element will adhere to the Ag 3 PO 4 The surface of the particle, thereby preventing the absorption of visible light and reducing the photocatalytic performance

Method used

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  • A kind of visible light responsive silver phosphate composite photocatalyst and its preparation and application
  • A kind of visible light responsive silver phosphate composite photocatalyst and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Weigh CTAB, Na 2 SiO 3 and NH 4 h 2 PO 4 Add 0.034g, 0.17g, and 0.1725g to 30mL of water in sequence, and mix and stir at 500r / min for 40min at a constant temperature of 60°C.

[0029] (2) Weigh 0.34g AgNO 3 Dissolve in 10mL of water to make silver nitrate solution.

[0030] (3) The silver nitrate solution was added dropwise to the mixed solution in step (1), and stirred at a constant temperature of 60° C. at a speed of 500 r / min for 1 h.

[0031] (4) The obtained precipitate was centrifuged, washed alternately with distilled water and absolute ethanol, and dried in a vacuum oven at 60° C. for 12 hours to obtain a silver phosphate composite photocatalyst responding to visible light.

Embodiment 2

[0033] (1) Weigh CTAB, Na 2 SiO 3 and NH 4 h 2 PO 4 Add 0.034g, 0.17g, and 0.1725g to 30mL of water in sequence, and mix and stir at 500r / min for 40min at a constant temperature of 60°C.

[0034] (2) Weigh 0.34g AgNO 3 Dissolve in 10mL of water to make silver nitrate solution.

[0035] (3) Weigh 0.0017g of polythiophene and disperse it in the mixed liquid described in step (1).

[0036] (4) The silver nitrate solution was added dropwise to the mixed solution in step (3), and stirred at a constant temperature of 60° C. at a speed of 500 r / min for 1 h.

[0037] (5) The obtained precipitate was centrifuged, washed alternately with distilled water and absolute ethanol, and dried in a vacuum oven at 60° C. for 12 hours to obtain a silver phosphate composite photocatalyst responding to visible light.

Embodiment 3

[0039] (1) Weigh CTAB, Na 2 SiO 3 and NH 4 h 2 PO 4 Add 0.034g, 0.17g, and 0.1725g to 30mL of water in sequence, and mix and stir at 500r / min for 40min at a constant temperature of 60°C.

[0040] (2) Weigh 0.34g AgNO 3 Dissolve in 10mL of water to make silver nitrate solution.

[0041] (3) Weigh 0.0034g of polythiophene and disperse it in the mixed liquid described in step (1).

[0042] (4) The silver nitrate solution was added dropwise to the mixed solution in step (3), and stirred at a constant temperature of 60° C. at a speed of 500 r / min for 1 h.

[0043] (5) The obtained precipitate was centrifuged, washed alternately with distilled water and absolute ethanol, and dried in a vacuum oven at 60° C. for 12 hours to obtain a silver phosphate composite photocatalyst responding to visible light.

[0044] The scanning electron micrograph of the silver phosphate composite photocatalyst of the visible light response of the obtained embodiment is as follows figure 1 shown. ...

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Abstract

The invention belongs to the technical field of photocatalytic materials and discloses a visible light responding silver phosphate composite photocatalyst and its preparation and application. The preparation method comprises the following preparation steps: adding cetyl trimethyl ammonium bromide, ammonium biphosphate and sodium silicate into water, stirring and uniformly mixing to obtain mixed liquor, dropwise adding a silver nitrate solution into the above mixed liquor and stirring to carry out a reaction, centrifuging reaction products, washing and drying so as to obtain the visible light responding silver phosphate composite photocatalyst. The photocatalytic degradation effect of the composite photocatalyst can be further enhanced by addition of polythiophene. The preparation method is simple and environmentally friendly and is beneficial to large-scale production. The product has a good photocatalytic degradation property to rhodamine B and has a great development and application prospect in the aspect of degrading organic dye pollutants under the condition of visible light.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and in particular relates to a silver phosphate composite photocatalyst responding to visible light, as well as its preparation and application. Background technique [0002] Photocatalytic technology is a green advanced oxidation technology, which has extensive research and application in the field of environmental pollution control and energy development. Traditional TiO 2 Photocatalyst has the advantages of cheap and non-toxic, stable chemical properties, strong light corrosion resistance and high oxidation ability. It is the most thoroughly studied and widely used photocatalyst. However, it can only absorb ultraviolet rays with a wavelength of less than 380nm in sunlight. Light, the utilization rate of sunlight is very low. Therefore, the study of new and efficient visible light-responsive photocatalysts has become a research hotspot in the field of photocatalysis in recent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/18C02F1/30C02F101/30
CPCB01J27/18C02F1/30C02F2101/38C02F2305/10
Inventor 牛晓君马金玲
Owner SOUTH CHINA UNIV OF TECH
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