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Hexagonal boron nitride modified graphitized carbon nitride composite photocatalyst and its preparation method and application

A hexagonal boron nitride and graphitization technology, applied in the field of photocatalysis, can solve the problems of poor photocatalytic activity, low specific surface area, and weak separation ability of photogenerated carriers, so as to improve the migration speed, increase the specific surface area, and quickly predict The effect of adsorbing pollutants

Active Publication Date: 2019-05-03
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the energy gap of pure phase graphitized carbon nitride is about 2.7 eV, which can only use sunlight below 460 nm, and the polymerization product is a dense block particle, which has low specific surface area, weak separation ability of photogenerated carriers, and photocatalytic Poor activity and other problems limit the wide application of this material

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  • Hexagonal boron nitride modified graphitized carbon nitride composite photocatalyst and its preparation method and application
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  • Hexagonal boron nitride modified graphitized carbon nitride composite photocatalyst and its preparation method and application

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Embodiment 1

[0034] A hexagonal boron nitride modified graphitized carbon nitride composite photocatalyst of the present invention, the hexagonal boron nitride modified graphitized carbon nitride composite photocatalyst uses graphitized carbon nitride as a carrier, and the graphitized carbon nitride carrier is modified Layered hexagonal boron nitride.

[0035] In this embodiment, the mass percentage of hexagonal boron nitride in the hexagonal boron nitride-modified graphitized carbon nitride composite photocatalyst is 0.22%.

[0036] The preparation method of the hexagonal boron nitride modified graphitized carbon nitride composite photocatalyst of the above-mentioned present embodiment comprises the following steps:

[0037](1) Mix 1 mg hexagonal boron nitride and 1 g dicyandiamide in an agate mortar, and grind continuously for 30 min to obtain the precursor of the mixture.

[0038] (2) Put the mixture precursor of hexagonal boron nitride and graphitized carbon nitride precursor obtained...

Embodiment 2

[0042] A hexagonal boron nitride modified graphitized carbon nitride composite photocatalyst of the present invention, the hexagonal boron nitride modified graphitized carbon nitride composite photocatalyst uses graphitized carbon nitride as a carrier, and the graphitized carbon nitride carrier is modified Layered hexagonal boron nitride.

[0043] In this embodiment, the mass percentage of hexagonal boron nitride in the hexagonal boron nitride-modified graphitized carbon nitride composite photocatalyst is 0.44%.

[0044] The preparation method of the hexagonal boron nitride modified graphitized carbon nitride composite photocatalyst of the above-mentioned present embodiment comprises the following steps:

[0045] (1) Mix 2 mg of hexagonal boron nitride and 1 g of dicyandiamide in an agate mortar, and grind continuously for 30 min to obtain the precursor of the mixture.

[0046] (2) Put the mixture precursor of hexagonal boron nitride and graphitized carbon nitride precursor o...

Embodiment 3

[0053] A hexagonal boron nitride modified graphitized carbon nitride composite photocatalyst of the present invention, the hexagonal boron nitride modified graphitized carbon nitride composite photocatalyst uses graphitized carbon nitride as a carrier, and the graphitized carbon nitride carrier is modified Layered hexagonal boron nitride.

[0054] In this embodiment, the mass percentage of hexagonal boron nitride in the hexagonal boron nitride-modified graphitized carbon nitride composite photocatalyst is 0.88%.

[0055] The preparation method of the hexagonal boron nitride modified graphitized carbon nitride composite photocatalyst of the above-mentioned present embodiment comprises the following steps:

[0056] (1) Mix 4 mg hexagonal boron nitride and 1 g dicyandiamide in an agate mortar, and grind continuously for 30 min to obtain the precursor of the mixture.

[0057] (2) Put the mixture precursor of hexagonal boron nitride and graphitized carbon nitride precursor obtaine...

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Abstract

The invention discloses a hexagonal boron nitride modified graphitized carbon nitride composite photocatalyst and its preparation method and application. The composite photocatalyst uses graphitized carbon nitride as a carrier, and the graphitized carbon nitride carrier is decorated with layered Hexagonal boron nitride. The preparation method includes mixing hexagonal boron nitride and graphitized carbon nitride precursor, and calcining the resulting mixture precursor to obtain a hexagonal boron nitride modified graphitized carbon nitride composite photocatalyst. The hexagonal boron nitride modified graphitized carbon nitride composite photocatalyst of the present invention has the characteristics of green and environmental protection, complete no metal doping, large specific surface area, high photogenerated electron-hole separation efficiency, high photocatalytic activity, good stability, corrosion resistance, etc. Advantages: The preparation method has the advantages of simplicity, low raw material cost, low energy consumption, short time consumption, and easy control of conditions. When the composite photocatalyst of the present invention is used to degrade dye wastewater, it has the advantages of simple application method, stable photocatalytic performance, strong corrosion resistance, and high efficiency in degrading dye wastewater.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a hexagonal boron nitride modified graphitized carbon nitride composite photocatalyst and a preparation method and application thereof. Background technique [0002] With the increasingly serious energy crisis and environmental pollution problems, new energy technologies and new environmental purification technologies have attracted much attention. As a green technology, photocatalytic technology has made great progress in recent years. Photocatalytic reactions can not only split water to generate clean hydrogen energy, but also show great potential in photodegradation of environmental pollution. Photocatalytic purification technology has the advantages of small secondary pollution, low operating cost, and the use of solar energy to provide reaction driving force. It has broad application prospects in wastewater purification treatment and air purification. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/10C02F1/30
CPCC02F1/30B01J27/24C02F2101/308C02F2305/10B01J35/61B01J35/39Y02W10/37
Inventor 袁兴中蒋龙波梁婕王侯吴志斌张进陈晓红李辉曾光明
Owner HUNAN UNIV
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