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Preparation method and application of novel silver-nanoparticle modified ultrathin graphite phase carbon nitride catalyst

A graphite phase carbon nitride, silver nanoparticle technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problem of easy recombination of photogenerated electrons and holes, low photon quantum efficiency, photocatalysis problems such as low efficiency, to achieve good chemical stability and reusability, improve catalytic ability, and the effect of simple and easy operation.

Inactive Publication Date: 2018-02-13
NANTONG TEXTILE & SILK IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, numerous studies have found that g-C 3 N 4 In the photocatalytic reaction, there are small specific surface area, low photon quantum efficiency, and easy recombination of photogenerated electrons and holes, which directly lead to low photocatalytic efficiency and poor catalytic stability.

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  • Preparation method and application of novel silver-nanoparticle modified ultrathin graphite phase carbon nitride catalyst
  • Preparation method and application of novel silver-nanoparticle modified ultrathin graphite phase carbon nitride catalyst
  • Preparation method and application of novel silver-nanoparticle modified ultrathin graphite phase carbon nitride catalyst

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preparation example Construction

[0035] see figure 1 , figure 1 It is a schematic flow chart of the preparation method of the novel silver nanoparticle modified ultrathin graphite phase carbon nitride catalyst of the present invention. Such as figure 1 As shown, the present invention provides a kind of preparation method of novel silver nanoparticles modified ultrathin graphite phase carbon nitride catalyst, comprising the following steps:

[0036] Using urea as a precursor, the bulk graphite phase carbon nitride was prepared by high temperature heat treatment;

[0037] Preparation of ultrathin graphitic carbon nitride sheets;

[0038] A biomimetic polydopamine coating was loaded on ultra-thin graphitic carbon nitride sheets by dipping self-polymerization;

[0039] Based on the modification of polydopamine, using its own reducibility, silver nanoparticles are loaded on the surface of ultra-thin graphite phase carbon nitride sheets, and a new type of silver nanoparticles modified ultra-thin graphite phase ...

Embodiment 1

[0060] This implementation case shows the preparation method of a novel silver nanoparticle modified ultra-thin graphite phase carbon nitride catalyst according to the following steps:

[0061] (1) Obtain massive graphite phase carbon nitride by heat-treating urea: Weigh 10 g of urea and put it into a crucible, heat-treat it in a muffle furnace, the treatment temperature is 550°C, the constant temperature time is 2 hours, and the heating rate is 0.5°C / min After the reaction, cool to room temperature, take out the sample and seal it up.

[0062] (2) Convert the massive graphite phase carbon nitride into an ultra-thin graphite phase carbon nitride sheet by secondary high-temperature annealing and etching: put the massive graphite phase carbon nitride prepared in (1) into the crucible , continue to do heat treatment in the muffle furnace, the treatment temperature is 550°C, the constant temperature time is 2 hours, the heating rate is 2°C / min, after the reaction is completed, coo...

Embodiment 2

[0077] This implementation case shows the preparation method of a novel silver nanoparticle modified ultra-thin graphite phase carbon nitride catalyst according to the following steps:

[0078] (1) Obtain massive graphite phase carbon nitride by heat-treating urea: 10 g of urea is weighed and put into a crucible, and heat-treated in a muffle furnace at a treatment temperature of 570° C., a constant temperature time of 2 hours, and a heating rate of 0.5° C. / min. After the reaction, cool to room temperature, take out the sample and seal it up.

[0079](2) Convert massive graphite phase carbon nitride into ultra-thin graphite phase carbon nitride sheets by secondary high-temperature annealing and etching: put the massive graphite phase carbon nitride prepared in (1) into the crucible , continue to do heat treatment in the muffle furnace, the treatment temperature is 550 ° C, the constant temperature time is 1 hour, and the heating rate is 2 ° C / min. After the reaction is comple...

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Abstract

The invention discloses a preparation method and application of a novel silver-nanoparticle modified ultrathin graphite phase carbon nitride catalyst. The method includes: subjecting urea to heat treatment to obtain lump graphite phase carbon nitride; subjecting the lump graphite phase carbon nitride to secondary heat treatment to obtain an annealing etched ultrathin graphite phase carbon nitridelayer; structuring a bionic mussel polydopamine biocoating on ultrathin graphite phase carbon nitride by adopting an impregnation method; based on polydopamine modification and by the aid of reducibility of silver nanoparticles, loading the silver nanoparticles on the surface of the ultrathin graphite phase carbon nitride. The two-dimensional ultrathin graphite phase carbon nitride layer is prepared by adopting the high-temperature annealing method, the silver nanoparticles are prepared by adopting the green bionic method of self-polymerization polydopamine, and good prospects of the novel composite high-activity photocatalyst are displayed in the field of organic pollutants like photocatalytic degradation of methylene blue and phenol.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a preparation method of a novel silver nanoparticle-modified ultra-thin graphite phase carbon nitride catalyst and its application in the fields of photocatalytic pollutant degradation catalysts, electrodes, composite materials, and the like. Background technique [0002] For a long time, green plants in nature have used solar energy and their own chlorophyll to convert water and carbon dioxide in the atmosphere into carbohydrates and release oxygen. This process converts light energy into chemical energy, and at the same time provides energy for everything that exists on the earth. Organisms provide nutrients and abundant natural resources such as oil, coal, and natural gas for the rapid development of human society. The global crisis of sharply increasing demand for clean energy and large-scale environmental pollution have been regarded as the main challenges facing human dev...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30G01N21/65H01M4/90C02F101/30C02F101/34C02F101/36C02F101/38
CPCH01M4/9075G01N21/658C02F1/30B01J27/24C02F2101/30C02F2101/36C02F2101/345C02F2101/40C02F2101/38C02F2305/10B01J35/39Y02E60/50
Inventor 赖跃坤蔡京升黄剑莹
Owner NANTONG TEXTILE & SILK IND TECH RES INST
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