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Non-split-phase boron-carbon-nitrogen photocatalytic material and preparation method thereof

A photocatalytic material and non-phase-separated boron technology, which is applied in the field of non-phase-separated boron carbon-nitrogen photocatalytic materials and their preparation, can solve the problems of complex process and high cost of h-BCN materials, and achieve carbon content and energy band. Controllable structure, low production cost and high photocatalytic efficiency

Pending Publication Date: 2022-01-28
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the raw material used in this method is bis-BN cyclohexane, and the prepared h-BCN material is complex and expensive
[0006] Professor Wang Xinchen's research group (GUO F S, YANG P J, PAN Z M, et al. Carbon-Doped BNNanosheets for the Oxidative Dehydrogenation of Ethylbenzene[J].Angew ChemInt Edit,2017,56(28):8231-5) combined glucose and boric acid Mix it with urea, and prepare two-dimensional porous BCN nanosheets by high-temperature pyrolysis in an ammonia atmosphere. The concentration of C atoms is regulated by changing the amount of glucose, and the XPS measurement spectrum of BCN is analyzed, which can be considered as the composition of BN and C. phase structure, but the synthesized h-BCN photocatalysts CO 2 The reduction efficiency is only 38μmol / g h

Method used

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  • Non-split-phase boron-carbon-nitrogen photocatalytic material and preparation method thereof
  • Non-split-phase boron-carbon-nitrogen photocatalytic material and preparation method thereof
  • Non-split-phase boron-carbon-nitrogen photocatalytic material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A non-phase-separated boron-carbon-nitrogen photocatalytic material and a preparation method thereof. The preparation method described in this embodiment is:

[0028] According to the molar ratio of boron-containing compound: nitrogen-containing compound: water is 1: (0.25-0.5): (95-100), the boron-containing compound, the nitrogen-containing compound and the water are mixed, and stirred at room temperature 10-15min, then stirred at 90-95°C for 3-4h to obtain a mixed solution; kept the mixed solution at 100-110°C for 23-24h to obtain a precursor solution; then the precursor solution The non-phase-separated boron-carbon-nitrogen photocatalytic material is prepared by heat-treating for 3-4 hours under the conditions of ammonia atmosphere and 1250-1300°C.

[0029] The boron-containing compound is boric acid.

[0030] The nitrogen-containing compound is diethylenetriamine.

Embodiment 2

[0032] A non-phase-separated boron-carbon-nitrogen photocatalytic material and a preparation method thereof. The steps of the preparation method described in this embodiment are:

[0033] According to the boron-containing compound: nitrogen-containing compound: water molar ratio is 1: (0.25 ~ 1.0): (90 ~ 95), the boron-containing compound, the nitrogen-containing compound and the water are mixed, stirred at room temperature 15-20min, then stirred at 90-95°C for 4-5h to obtain a mixed solution; kept the mixed solution at 90-100°C for 22-23h to obtain a precursor solution; then the precursor solution The non-phase-separated boron-carbon-nitrogen photocatalytic material is prepared by heat-treating for 4-5 hours under the conditions of ammonia gas atmosphere and 1200-1250°C.

[0034] The boron-containing compound is sodium borate.

[0035] The nitrogen-containing compound is triethylenetetramine.

Embodiment 3

[0037] A non-phase-separated boron-carbon-nitrogen photocatalytic material and a preparation method thereof. The steps of the preparation method described in this embodiment are:

[0038] According to the molar ratio of boron-containing compound: nitrogen-containing compound: water is 1: (1.0-1.5): (85-90), the boron-containing compound, the nitrogen-containing compound and the water are mixed, and stirred at room temperature 10-15min, then stirred at 90-95°C for 3-4h to obtain a mixed solution; kept the mixed solution at 90-100°C for 21-22h to obtain a precursor solution; then the precursor solution The non-phase-separated boron-carbon-nitrogen photocatalytic material is prepared by heat treatment for 3-4 hours under the condition of ammonia atmosphere and 1150-1200°C.

[0039] The boron-containing compound is sodium perborate.

[0040] The nitrogen-containing compound is triethylenetetraminehexaacetic acid.

[0041] The non-phase-separated boron-carbon-nitrogen photocatal...

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Abstract

The invention relates to a non-split-phase boron-carbon-nitrogen photocatalytic material and a preparation method thereof. According to the technical scheme, the preparation method comprises the steps of mixing a boron-containing compound, a nitrogen-containing compound and water according to the molar ratio of the boron-containing compound to the nitrogen-containing compound to the water being 1: (0.25-4): (50-100), stirring for 10-20 minutes under the condition of normal temperature, and stirring for 3-5 hours under the condition of 90-95 DEG C to obtain a mixed solution; enabling the mixed solution to be subjected to heat preservation for 20-24 h at the temperature of 90-110 DEG C, and obtaining a precursor solution; and then carrying out heat treatment on the precursor solution in an ammonia gas atmosphere at 1100-1300 DEG C for 3-5 hours to prepare the non-split-phase boron-carbon-nitrogen photocatalytic material. The method is simple in process, low in production cost and suitable for batch production; the prepared non-split-phase boron-carbon-nitrogen photocatalytic material is controllable in carbon content and energy band structure and high in photocatalytic efficiency.

Description

technical field [0001] The invention belongs to the technical field of boron carbon nitrogen photocatalytic materials. In particular, it relates to a non-phase-separated boron-carbon-nitrogen photocatalytic material and a preparation method thereof. Background technique [0002] Photocatalytic hydrogen evolution, oxygen evolution and carbon dioxide reduction technologies are one of the effective means to solve environmental and energy crises. In the current research, the non-metallic photocatalytic material h-BCN has been proved to be a kind of emerging photocatalytic material with potential. Since h-BCN has a hexagonal honeycomb structure similar to graphene, and its bandwidth can be adjusted from 0 to 5.6eV, it shows great application prospects in the field of photocatalysis. [0003] Professor Ci Lijie (CI L, SONG L, JIN C, et al. Atomic layers of hybridized boron nitride and graphene domains [J]. Nat Mater, 2010, 9, 430-5.) from Rice University in the United States ado...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/00B01J37/08C01B32/40
CPCB01J37/08B01J27/24C01B32/40B01J35/39
Inventor 赵雷曾祥会陈辉方伟何漩杜星王大珩李薇馨
Owner WUHAN UNIV OF SCI & TECH