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Boron-sodium double-doped nano-layered graphite-like carbon nitride, and preparation method and application thererof

A graphite-phase carbon nitride and nano-layered technology, applied in chemical instruments and methods, inorganic chemistry, chemical/physical processes, etc., can solve the problems of small specific surface area, high photogenerated electron-hole recombination rate, and low photocatalytic efficiency To achieve the effects of enhancing light absorption, improving hydrogen production efficiency, and reducing recombination rate

Active Publication Date: 2020-06-02
YANCHENG INST OF TECH
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Problems solved by technology

The boron-sodium double-doped nano-layer graphite-like carbon nitride prepared by this method overcomes the g-C 3 N 4 Due to the technical problems of small specific surface area, high recombination rate of photogenerated electron-hole pairs, and low photocatalytic efficiency, a photocatalytic material with excellent properties has been obtained

Method used

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  • Boron-sodium double-doped nano-layered graphite-like carbon nitride, and preparation method and application thererof
  • Boron-sodium double-doped nano-layered graphite-like carbon nitride, and preparation method and application thererof
  • Boron-sodium double-doped nano-layered graphite-like carbon nitride, and preparation method and application thererof

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preparation example Construction

[0045] The invention provides a method for preparing boron-sodium double-doped nano-layer graphite-like carbon nitride, the preparation method comprising the following steps:

[0046] S1, dissolving melamine in water to obtain a melamine solution, adding ammonium nitrate to the melamine solution, after the reaction is completed, calcining the obtained solid product to obtain a nano-layered structure g-C 3 N 4 ;

[0047] S2, the nano-layered structure g-C 3 N 4 with NaBH 4 The reaction is mixed and the reaction product is calcined and cooled to obtain a boron-sodium double-doped nano-layered structure g-C 3 N 4 .

[0048] As an embodiment, in the step S1, the molar ratio of ammonium nitrate to melamine is 2 to 5 (for example, the molar ratio of ammonium nitrate to melamine can be specifically 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9 or 5).

[0049] When the molar ratio of ...

Embodiment 1

[0076] A method for preparing boron-sodium double-doped nano-layer graphite-like carbon nitride, comprising the following steps:

[0077] S1: nano-layered structure g-C 3 N 4 preparation of

[0078] S11, 7.5672g (60mmol) of melamine was dissolved in 300mL of water, and heated to 95°C to obtain a melamine solution.

[0079] S12, under stirring conditions, dissolve 9.6g (120mmol) of ammonium nitrate in 20ml of water, and add dropwise to the melamine solution at a rate of 1-3 seconds per drop. After the dropwise addition, react for 1 hour.

[0080] S13, after the reaction is completed, cool to room temperature to obtain a white floc, filter the precipitate to obtain melamine ammonium dinitrate, place the melamine ammonium dinitrate in a drying oven at 60° C., and dry for 12 hours.

[0081] S14, put the dried melamine ammonium dinitrate into a 50mL crucible and cover it, place it in a muffle furnace for calcination at 350°C for 2 hours, and the heating rate is 1°C / min; then at ...

Embodiment 2

[0088] The difference between this example and Example 1 is that the amount of sodium borohydride in step S21 is 5 mg, and other steps and process parameters are consistent with Example 1.

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Abstract

The invention belongs to the technical field of inorganic photocatalyst materials, and concretely relates to a preparation method of boron-sodium double-doped nano-layered graphite-like carbon nitride. The preparation method comprises the following steps: S1, dissolving melamine in water to obtain a melamine solution, adding ammonium nitrate into the melamine solution, and calcining an obtained solid product after the reaction is completed so as to obtain g-C3N4 with a nano-layered structure; and S2, mixing the nano-layered structure g-C3N4 with NaBH4, and then carrying out calcining and cooling so as to obtain the boron-sodium double-doped nano-layered structure g-C3N4. The boron-sodium double-doped nano-layered graphite-like carbon nitride obtained by the preparation method has a good photocatalytic performance and has a relatively good application prospect.

Description

technical field [0001] The invention belongs to the technical field of inorganic photocatalyst materials, and in particular relates to boron-sodium double-doped nano-layer graphite-like carbon nitride and its preparation method and application. Background technique [0002] With the excessive consumption of fossil fuels and the increasingly prominent problems of environmental pollution, the technology of solar photocatalytic water splitting to produce hydrogen has gradually become a new path of solar energy conversion that has been extensively studied. At present, semiconductors are generally used as photocatalysts, but their ultra-low activity limits industrialization. Therefore, it is imperative to develop low-cost, high-efficiency co-catalysts. Noble metals are recognized as co-catalysts for efficient hydrogen production, but the cost is high, and non-noble metal co-catalysts can effectively reduce costs. and advantages of non-precious metal cocatalysts. [0003] Graph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C01B3/04
CPCB01J27/24C01B3/042C01B2203/1088B01J35/39Y02E60/36
Inventor 关荣锋池宪虎田亚西张文惠杨秀丽邵荣
Owner YANCHENG INST OF TECH
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