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

Examples

Experimental program
Comparison scheme
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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PUM

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Abstract

The present invention has prepared a kind of g-C 3 N 4 A photocatalyst compounded with polymer poly1,4-diphenylbutadiyne (PDPB) and applied to the degradation of rhodamine B dye. The main feature of the present invention is that the g-C 3 N 4 Mix and stir with PDPB in the solvent, make g‑C by evaporating the solvent 3 N 4 Compounded with PDPB. The preparation method adopted by the invention is simple and easy to operate, has low cost, high yield and less environmental pollution. Meanwhile, the photogenerated electrons and holes of the catalyst prepared by the invention can be effectively separated, and the photocatalytic activity is significantly improved. Through the degradation of rhodamine B under visible light, it is proved that this CN‑PDPB composite 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
CPCB01J31/06B01J35/004C02F1/30C02F2101/308C02F2101/38C02F2305/10
Inventor 张金龙雷菊英刘沣慧
Owner EAST CHINA UNIV OF SCI & TECH
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