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Carbon nitride-supported molybdenum nitride nanoparticle photocatalyst, and preparation method and application thereof

A nanoparticle and photocatalyst technology, applied in the field of materials science, can solve the problems of few surface active sites, easy recombination of photogenerated carriers, photolysis of water and hydrogen evolution performance, etc., to improve the catalytic process, good photogenerated charge separation efficiency, reduce Effect of charge transfer distance

Inactive Publication Date: 2018-11-13
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] One of the purposes of the present invention is to solve the technical problems of poor photolysis and hydrogen evolution performance caused by the limited light absorption range of carbon nitride as a photocatalytic material, few surface active sites, and easy recombination of photogenerated carriers. A two-dimensional ultra-thin graphitized carbon nitride-supported molybdenum nitride nanoparticle photocatalyst is provided. The catalyst has a light absorption range of λ420nm Under irradiation, the hydrogen production rate can reach up to 0.89 μmol h -1 g -1

Method used

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  • Carbon nitride-supported molybdenum nitride nanoparticle photocatalyst, and preparation method and application thereof
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  • Carbon nitride-supported molybdenum nitride nanoparticle photocatalyst, and preparation method and application thereof

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Effect test

Embodiment 1

[0080] A carbon nitride-supported molybdenum nitride nanoparticle photocatalyst mainly contains three main elements of Mo, C and N, and is prepared by a method comprising the following steps:

[0081] (1), preparation of ultra-thin carbon nitride (hereinafter referred to as CN)

[0082] Add 1g of urea into 10ml of double-distilled water, stir and dissolve to obtain a 0.1g / ml aqueous urea solution, then use 1M HCl aqueous solution to adjust the pH to 4-5, stir for 10 minutes, then control the temperature to 70°C and dry it, then in N 2 Under the atmosphere, the heating rate is controlled at 5°C / min, and the temperature is raised to 520°C for calcination for 4 hours to obtain ultra-thin CN;

[0083] (2), molybdenum nitride (hereinafter referred to as Mo 2 N) preparation

[0084] Add 3g of ammonium molybdate tetrahydrate into 50ml of double-distilled water, stir in an oil bath at 40°C until clarification, and obtain an aqueous ammonium molybdate solution with a concentration of...

Embodiment 2

[0107] A carbon nitride-supported molybdenum nitride nanoparticle photocatalyst mainly contains three main elements of Mo, C and N, and is prepared by a method comprising the following steps:

[0108] (1), preparation of ultra-thin carbon nitride (hereinafter referred to as CN)

[0109] Add 1g of urea into 10ml of double-distilled water, stir and dissolve to obtain a 0.1g / ml aqueous urea solution, then use 1M HCl aqueous solution to adjust the pH to 4-5, stir for 10 minutes, then control the temperature to 70°C and dry it, then in N 2 Under the atmosphere, the heating rate is controlled at 5°C / min, and the temperature is raised to 520°C for calcination for 4 hours to obtain ultra-thin CN;

[0110] (2), molybdenum nitride (hereinafter referred to as Mo 2 N) preparation

[0111] Add 3g of ammonium molybdate tetrahydrate into 50ml of double-distilled water, stir in an oil bath at 40°C until clarification, and obtain an aqueous ammonium molybdate solution with a concentration of...

Embodiment 3

[0129] A carbon nitride-supported molybdenum nitride nanoparticle photocatalyst mainly contains three main elements of Mo, C and N, and is prepared by a method comprising the following steps:

[0130] (1), preparation of ultra-thin carbon nitride (hereinafter referred to as CN)

[0131] Add 1g of urea into 10ml of double-distilled water, stir and dissolve to obtain a 0.1g / ml aqueous urea solution, then use 1M HCl aqueous solution to adjust the pH to 4-5, stir for 10 minutes, then control the temperature to 70°C and dry it, then in N 2 Under the atmosphere, the heating rate is controlled at 5°C / min, and the temperature is raised to 520°C for calcination for 4 hours to obtain ultra-thin CN;

[0132] (2), molybdenum nitride (hereinafter referred to as Mo 2 N) preparation

[0133] Add 3g of ammonium molybdate tetrahydrate into 50ml of double-distilled water, stir in an oil bath at 40°C until clarification, and obtain an aqueous ammonium molybdate solution with a concentration of...

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Abstract

The invention discloses a carbon nitride-supported molybdenum nitride nanoparticle photocatalyst, and a preparation method and an application thereof. The preparation method comprises the steps: firstly, preparing ultra-thin precursors of CN and Mo2N, and then preparing a Mo2N aqueous solution and a CN ethanol dispersion solution; and then dropping the CN ethanol dispersion solution into the Mo2Naqueous solution in a 70 DEG C oil bath, stirring and mixing, then centrifuging, washing and drying to obtain the carbon nitride-supported molybdenum nitride nanoparticle photocatalyst. The photocatalyst has the advantages of wide light absorption range, property of high decomposition of water to produce hydrogen, low electrical resistivity, fast current carrier transfer ability, high photogenerated current carrier separation ability, low current carrier recombination rate, good hydrogen evolution circulation stability and the like, is used for photocatalytic decomposition of water to producehydrogen, and has the highest hydrogen production rate reaching 0.89 [mu]mol.g<-1>.h<-1>. The preparation method has the advantages of simple operation, low cost and non-toxic used raw materials, andconforms to production of the concept of environmental protection.

Description

technical field [0001] The invention relates to a photocatalytic material, in particular to a carbon nitride-supported molybdenum nitride nanoparticle photocatalyst and a preparation method and application thereof, belonging to the field of materials science. Background technique [0002] The excessive consumption of fossil fuels and the increasingly serious environmental problems caused by the energy crisis have made the demand for renewable energy and clean energy very strong in modern society. Hydrogen (H 2 ) as the most promising candidate for green energy because of its zero carbon footprint and high mass-to-energy density, which can solve the energy problem to a certain extent. In the process of generating hydrogen, solar water splitting to produce hydrogen is considered to be the most sustainable option, so researchers are committed to finding high-performance, low-cost photocatalysts for splitting water to produce hydrogen. [0003] At present, although semiconduct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/02C01B3/04B01J35/00
CPCC01B3/042B01J27/24C01B2203/1041C01B2203/0277B01J35/39B01J35/40Y02E60/36
Inventor 闵宇霖巩帅奇范金辰徐群杰时鹏辉
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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