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Silver phosphate and conjugated polymer visible light composite photocatalyst

A silver phosphate, visible light technology, applied in the direction of organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, special compound water treatment, etc., can solve the problem of poor visible light absorption performance, low photocatalytic activity, Due to the low mobility of photogenerated carriers, the effects of good absorption, high photocatalytic degradation efficiency, and rich source of raw materials are achieved.

Active Publication Date: 2016-06-29
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This is due to its poor absorption of visible light due to its wide bandgap, and the low mobility of photogenerated carriers leads to low photocatalytic activity.

Method used

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  • Silver phosphate and conjugated polymer visible light composite photocatalyst
  • Silver phosphate and conjugated polymer visible light composite photocatalyst
  • Silver phosphate and conjugated polymer visible light composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Mix and grind 0.252g melamine and 0.392g cyclobutane tetracarboxylic dianhydride, then put the mixture in a covered porcelain boat, put it in a muffle furnace and raise the temperature to 350 at a rate of 10°C / min ℃, keep warm for 5h;

[0037] (2) Grinding the obtained solid block into powder, washing with deionized water several times, and drying to obtain polyimide;

[0038] (3) Prepare 50mL0.20mol / L citric acid solution and 50mL0.20mol / LAgNO respectively 3 solution;

[0039] (4) The prepared AgNO 3 The solution was added to the citric acid solution, and stirred in the dark for 15 minutes;

[0040] (5) Prepare 100mL of 15g / L polyvinylpyrrolidone (PVPK15) ethanol solution, add it to the solution in step (4), and stir in the dark for 20 minutes;

[0041] (6) Add 0.50 g of the polyimide powder prepared in step (2) into (5) and stir vigorously at a speed of 280rpm-320rpm for 15min;

[0042] (7) Prepare 100mL0.06mol / LNa 2 HPO 4 The solution is added dropwise to ...

Embodiment 2

[0050] (1) Mix and grind 0.252g melamine and 0.644g benzophenone tetracarboxylic dianhydride, then place the mixture in a covered porcelain boat, put it in a muffle furnace and heat up to 300 at a rate of 6°C / min ℃, keep warm for 5h;

[0051] (2) grinding the obtained solid block into powder, washing with deionized water for several times, and drying to obtain polyimide;

[0052] (3) Prepare 50mL of 0.20mol / L citric acid solution and 50mL of 0.20mol / LAgNO respectively 3 solution;

[0053] (4) The prepared AgNO 3 The solution was added to the citric acid solution and stirred in the dark for 15 min;

[0054] (5) Prepare 100mL 18g / L polyvinylpyrrolidone (PVPK12) ethanol solution, add it to the solution in step (4), and stir in the dark for 20min;

[0055] (6) Take 0.42 g of the polyimide powder prepared in step (2), add it to (5), and stir at a speed of 280rpm-320rpm for 15min;

[0056] (7) Prepare 100mL of 0.06mol / LNa 2 HPO 4 The solution was added dropwise to the solutio...

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Abstract

The invention discloses a silver phosphate and conjugated polymer visible light composite photocatalyst. Silver phosphate particles are attached to the surface of polyimide to form a silver phosphate / polyimide visible light composite photocatalyst, wherein the silver phosphate particles are spherical, and the particle size is 300-400 nm. The obtained visible light composite photocatalyst has good absorption performance in a 200-800 nm ultraviolet visible light area, and absorbance exceeds 0.3. The visible light catalyst has efficient photocatalytic degradation efficiency on organic dye rhodamine B under excitation of visible light. As for a rhodamine B solution with the concentration being 10 mg / L, when the addition amount of the composite catalyst is 1g / L, the degradation rate of rhodamine exceeds 80% after being irradiated by visible light for 30 min, and the degradation rate of rhodamine reaches 95% or above after being irradiated by visible light for 40 min.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis for environmental treatment, in particular to a silver phosphate-conjugated polymer visible light composite photocatalyst. Background technique [0002] At present, mankind is facing a serious energy crisis and environmental pollution caused by excessive use of fossil energy. Photocatalytic technology can use abundant and clean solar energy to purify the environment or decompose water to produce hydrogen, so it has attracted extensive attention from researchers around the world. Compared with traditional treatment technologies, photocatalytic oxidation technology has the advantages of high efficiency, energy saving, easy operation, simple process, clean and non-toxic, and reduced secondary pollution. [0003] Silver phosphate (Ag 3 PO 4 ) as a new type of visible light catalyst has a strong photocatalytic oxidation ability, and the theoretically calculated quantum efficiency is as high as...

Claims

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Application Information

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IPC IPC(8): B01J31/26B01J31/06C02F1/30
CPCC02F1/30B01J31/06B01J31/26C02F2103/30C02F2305/10B01J35/39
Inventor 张延霖郭强
Owner SOUTH CHINA NORMAL UNIVERSITY
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