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Preparation method of h-BN-based catalyst for hydrogen production by photolysis of water

A technology for photo-splitting water for hydrogen production and catalyst, applied in chemical instruments and methods, physical/chemical process catalysts, hydrogen production, etc., can solve the problems of low hydrogen production efficiency, poor photocatalyst activity, etc. , the effect of improving photocatalytic activity and improving photocatalytic efficiency

Pending Publication Date: 2022-02-18
CHINA UNIV OF MINING & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is: in order to solve the problem that the activity of the existing photocatalyst is still poor and the hydrogen production efficiency is low, a preparation method of a h-BN based photolysis water hydrogen production catalyst proposed

Method used

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  • Preparation method of h-BN-based catalyst for hydrogen production by photolysis of water

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Experimental program
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Effect test

Embodiment 1

[0046] The invention provides a technical solution: a preparation method of an h-BN-based photolysis water hydrogen production catalyst, comprising the following steps:

[0047] S1. Weigh boric acid (0.15g), urea (5g), and PEG2000 (0.5g), disperse them in deionized water, stir to disperse fully, evaporate the water to dryness, and obtain the precursor of h-BN;

[0048] S2. Put the above-mentioned h-BN precursor in a tube furnace, raise the temperature to 900°C at 4°C / min under an argon atmosphere, and calcinate for 4 hours to obtain carbon-doped h-BN;

[0049] S3, take by weighing the nickel chloride hexahydrate of 1.0mmol, the indium trichloride of 2.0mmol, the thiourea of ​​4.0mmol, join the N of 70ml, N-dimethylformamide and ethylene glycol (volume ratio 1: 1 ) in a mixed solvent, fully stirred and dissolved to form NiIn 2 S 4 The precursor solution;

[0050] S4. Weigh 0.2g of the above-prepared carbon-doped h-BN and add it to NiIn 2 S 4 In the precursor solution, stir...

Embodiment 2

[0053] The invention provides a technical solution: a preparation method of an h-BN-based photolysis water hydrogen production catalyst, comprising the following steps:

[0054] S1. Weigh boric acid (0.3g), thiourea (3g), and activated carbon (12g), disperse them in deionized water, stir to disperse fully, evaporate the water to dryness, and obtain the precursor of h-BN;

[0055] S2. Put the above-mentioned h-BN precursor in a tube furnace, raise the temperature to 900°C at 4°C / min under an argon atmosphere, and calcinate for 4 hours to obtain carbon / sulfur co-doped h-BN;

[0056] S3. Weigh 1.0mmol of zinc nitrate hexahydrate, 2.0mmol of indium sulfate nonahydrate, and 4.0mmol of thioacetamide, add them to 60ml of water, fully stir and dissolve to form ZnIn 2 S 4 The precursor solution;

[0057] S4. Weigh 0.5g of the above-prepared carbon / sulfur co-doped h-BN and add it to NiIn 2 S 4 In the precursor solution, stir to make it fully dispersed;

[0058] S5. In a high-pressu...

Embodiment 3

[0060] S1. Weigh fluoroboric acid (0.5g), melamine (5g), and sucrose (5g), and disperse them in deionized water, stir to disperse fully, evaporate the water to dryness, and obtain the precursor of h-BN;

[0061] S2. Put the above-mentioned h-BN precursor in a tube furnace, raise the temperature to 900°C at 4°C / min under an argon atmosphere, and calcinate for 4 hours to obtain fluorine-doped h-BN;

[0062] S3. Weigh 1.0mmol of cadmium nitrate tetrahydrate, 2.0mmol of indium trichloride, and 4.0mmol of sodium sulfide, add them to 50ml of ethanol, fully stir and dissolve to form CdIn 2 S 4 The precursor solution;

[0063] S4. Weigh 0.1g of the above-prepared fluorine co-doped h-BN and add it to CdIn 2 S 4 In the precursor solution, stir to make it fully dispersed;

[0064] S5. In a high-pressure reactor, at 150 degrees, hydrothermally react for 12 hours, wash and dry to obtain CdIn 2 S 4 / Fluorine-doped h-BN composites.

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Abstract

The invention discloses a preparation method of a h-BN-based catalyst for hydrogen production by photolysis of water. The preparation method comprises the following steps: S1, weighing a certain amount of a boron source, a carbon source and a nitrogen source, adding into a solvent A, fully stirring, dispersing, and drying by distillation to obtain an h-BN-doped precursor; s2, calcining in a tubular furnace to obtain doped h-BN; s3, weighing a certain amount of metal salt, indium salt and a sulfur source, adding the metal salt, the indium salt and the sulfur source into a solvent B, and fully stirring and dissolving to form a precursor solution of MIn2S4; s4, weighing a certain amount of doped h-BN, adding the doped h-BN into the precursor solution of the MIn2S4, and stirring to enable the doped h-BN to be fully dispersed; and S5, reacting the solution in a high-pressure reaction kettle at 150-220 DEG C for 6-48 hours, and cleaning and drying after the reaction is finished to obtain the MIn2S4 / h-BN composite material. The MIn2S4 / h-BN composite material is synthesized by taking doped h-BN as a carrier, so that the efficiency of producing hydrogen by photolysis of water is improved.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a preparation method of an h-BN-based photolysis water hydrogen production catalyst. Background technique [0002] With the rapid development of society, the abuse of antibiotics has caused serious water and soil pollution, posing a serious threat to the health of humans, animals and plants. Effectively controlling antibiotic pollution and protecting the living environment of human beings is a long-term and unresolved important issue. question. [0003] In the context of carbon neutrality, the use of solar energy to photocatalyze the degradation of antibiotics is considered to be a key green technology to solve this major problem. So far, experts and scholars have explored various semiconductor materials, including metal oxides, sulfides, oxyhalides, oxynitrides, organometallic framework materials, etc., for photocatalytic degradation. Among all the reported photo...

Claims

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Application Information

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IPC IPC(8): B01J27/24C01B3/04
CPCB01J27/24C01B3/042B01J35/39Y02E60/36
Inventor 梁华根陈浮郝绍金马静王安虎朱晨曦徐杨陈嘉庚盖泽嘉李沫汐
Owner CHINA UNIV OF MINING & TECH