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Preparation and application of g-C3N4 and polymer PDPB compounded photocatalyst

A polymer, composite light technology, applied in the field of nanomaterials, can solve the problems of small specific surface area, high probability of photo-generated electrons and holes recombination, low photon effective utilization rate, etc., to achieve good catalytic activity, less environmental pollution, and improved light The effect of catalytic efficiency

Inactive Publication Date: 2016-12-07
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But g-C 3 N 4 There are also the disadvantages of small specific surface area, high recombination probability of photogenerated electrons and holes, and low effective utilization of photons, which greatly limits the efficiency of g-C 3 N 4 further development of

Method used

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  • Preparation and application of g-C3N4 and polymer PDPB compounded photocatalyst
  • Preparation and application of g-C3N4 and polymer PDPB compounded photocatalyst
  • Preparation and application of g-C3N4 and polymer PDPB compounded photocatalyst

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Experimental program
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Effect test

Embodiment 1

[0027] g-C 3 N 4 preparation of

[0028] Add 6g of melamine into a crucible with a lid, place it in a muffle furnace and raise the temperature to 500°C at a rate of 4°C / min, keep it for 2 hours, then raise the temperature to 520°C at a rate of 2°C / min, and keep it for 2 hours. After cooling down to room temperature, it was taken out to obtain a yellow product g-C 3 N 4 , ground into powder for later use.

Embodiment 2

[0030] Preparation of 50:1 CN-PDPB

[0031] Dissolve 10mg PDPB in 10mL ethanol solution, then add 0.5g g-C 3 N 4 Stir for 24h. Then the ethanol solvent was evaporated to dryness in an oil bath, and then placed in an oven at 70°C to dry overnight, cooled naturally to room temperature and ground to obtain a 50:1CN-PDPB material.

Embodiment 3

[0033] Preparation of 50:2 CN-PDPB

[0034] Dissolve 20mg PDPB in 10mL ethanol solution, then add 0.5g g-C 3 N 4 Stir for 24h. Then the ethanol solvent was evaporated to dryness in an oil bath, and then placed in an oven at 70°C to dry overnight, cooled naturally to room temperature and ground to obtain a 50:2CN-PDPB material.

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Abstract

The invention relates to a g-C3N4 and polymer 1,4-diphenyl diacetylene (PDPB) compounded photocatalyst and application of the photocatalyst in degradation of dyestuff Rhodamine B. Preparation is mainly characterized in that g-C3N4 and PDPB are mixed and stirred in solvent, and g-C3N4 and PDPB are compounded together by evaporating the solvent. The preparing method is simple, easy to operate, low in cost, high in yield and small in environment pollution, prepared catalyst photoinduced electrons and holes can be effectively separated, and the photocatalytic activity is remarkably improved. Rhodamine B is degraded under visible light, and it is proved that the CN-PDPB compounded material has higher visible-light catalytic activity than pure carbon nitride and pure PDPB.

Description

technical field [0001] The invention relates to the field of nanomaterials and the field of photocatalysis Background technique [0002] g-C 3 N 4 As a non-metallic semiconductor catalyst, it has the advantages of high chemical stability, low density, good wear resistance, and strong biocompatibility. At the same time, g-C 3 N 4 The bandgap width of the metal is relatively narrow (about 2.7eV), so its photoresponse wavelength can be extended to the visible light region of 450nm. But g-C 3 N 4 There are also the disadvantages of small specific surface area, high recombination probability of photogenerated electrons and holes, and low effective utilization of photons, which greatly limits the efficiency of g-C 3 N 4 further development. [0003] will g-C 3 N 4 Combining with other polymers can effectively promote the separation of photogenerated electrons and holes, thereby enhancing the photocatalytic activity. PDPB is an emerging polymer material with good visibl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06C02F1/30C02F101/38
CPCC02F1/30B01J31/06C02F2101/38C02F2101/308C02F2305/10B01J35/39
Inventor 张金龙雷菊英刘沣慧
Owner EAST CHINA UNIV OF SCI & TECH
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