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A silver phosphate based visible light composite photocatalyst

A composite light and catalyst technology, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. Holes, charge separation difficulties and other problems, to achieve the effect of regular shape, good absorption, high photocatalytic degradation efficiency

Active Publication Date: 2018-05-15
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although P3HT has the advantages of good light absorption performance and environmental stability, high conductivity and good redox reversibility, it is difficult to separate its own charges, and it is difficult to form electrons and holes required in the photocatalytic process. There are few applications in the field of catalysis

Method used

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  • A silver phosphate based visible light composite photocatalyst
  • A silver phosphate based visible light composite photocatalyst
  • A silver phosphate based visible light composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Prepare 50 mL 0.20 mol / L citric acid solution and 50 mL 0.20 mol / L AgNO respectively 3 solution;

[0033] (2) The prepared AgNO 3 The solution was added to the citric acid solution and stirred for 15 min in the dark;

[0034] (3) Prepare 100 mL of 16 g / L polyethylene glycol (PEG-600) in isopropanol solution, add it to the solution in step (2), and stir in the dark for 20 min;

[0035] (4) Prepare 100 mL of 0.06 mol / L Na 2 HPO 4 The solution was added dropwise to the solution in step (3) at a rate of 1 drop / 3 seconds, stirred for 2 h after the dropwise addition, and left to stand for aging;

[0036] (5) Centrifuge, wash 4 times with deionized water, wash 1 time with absolute ethanol, and dry at 60°C for 24 h to obtain silver phosphate powder;

[0037] (6) Dissolve 4.23g of 2,5-dibromo-3-hexylthiophene in 50 mL of tetrahydrofuran, and add the mixed solution into a 250 mL dry three-necked flask;

[0038] (7) Add 6.84 mL of 2 mol / L cyclohexylmagnesium chloride eth...

Embodiment 2

[0050] (1) Prepare 50 mL 0.18mol / L citric acid solution and 50 mL 0.20 mol / L AgNO respectively 3 solution;

[0051] (2) The prepared AgNO 3 The solution was added to the citric acid solution and stirred for 15 min in the dark;

[0052] (3) Prepare 100 mL of 20 g / L polyethylene glycol (PEG-400) in isopropanol solution, add it to the solution in step (2), and stir in the dark for 20 min;

[0053] (4) Prepare 100 mL of 0.06 mol / L Na 2 HPO 4 The solution was added dropwise to the solution in step (3) at a rate of 1 drop / 4 seconds, stirred for 2 h after the dropwise addition, and left to stand for aging;

[0054] (5) Centrifuge, wash 4 times with deionized water, wash 1 time with absolute ethanol, and dry at 60°C for 24 h to obtain silver phosphate powder;

[0055] (6) Dissolve 4.23g of 2,5-dibromo-3-hexylthiophene in 50 mL of tetrahydrofuran, and add the mixed solution into a 250 mL dry three-necked flask;

[0056] (7) Add 6.84 mL of 2 mol / L cyclohexylmagnesium chloride ethe...

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Abstract

The invention discloses a silver phosphate-based visible light composite photocatalyst. The visible light composite photocatalyst obtained in the present invention is composed of silver phosphate and poly-3-hexylthiophene, wherein a small amount of poly-3-hexylthiophene is wrapped on the surface of silver phosphate particles with a particle size of 200-300 nm. The obtained visible light composite photocatalyst Ag3PO4 / P3HT has controllable structure and regular morphology. The visible light composite photocatalyst obtained by the present invention has good absorption in the ultraviolet-visible light region of 200-800 nm, and the absorbance exceeds 0.3; it has high photocatalytic degradation efficiency for the organic dye rhodamine B under excitation of visible light.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis for environmental treatment, and in particular relates to a silver phosphate-based visible light composite photocatalyst. Background technique [0002] Photocatalytic technology is a new environmental protection and energy technology with broad application prospects. Research results over the years have shown that most water pollutants can be decomposed or reduced by photocatalytic processes. Compared with traditional treatment technologies, photocatalytic oxidation technology has the advantages of high efficiency, energy saving, easy operation, simplified process, clean and non-toxic, and reduced secondary pollution. [0003] Silver phosphate (Ag 3 PO 4 ) As a new type of visible light catalyst, it has strong photocatalytic oxidation ability, and its theoretically calculated quantum efficiency is as high as 90%, which is much higher than other visible light catalytic materials (< 20%)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/26B01J27/18C02F1/30C02F101/34C02F101/38
CPCC02F1/30B01J27/1817B01J31/26C02F2101/308B01J35/23B01J35/39
Inventor 张延霖谢楚如顾凤龙郭强
Owner SOUTH CHINA NORMAL UNIVERSITY
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