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Preparation method of catalyst for photo-catalytically splitting water to produce hydrogen

A technology of photolysis of water to produce hydrogen and catalysts, applied in the field of nanomaterials, can solve the problems of weak visible light response, low hydrogen production efficiency, and high cost, and achieve the effects of low price, high hydrogen production efficiency, and high production efficiency

Inactive Publication Date: 2016-06-22
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of a photocatalyst for hydrogen production by photolysis of water to solve the problems of serious photogenerated electron-hole recombination, weak visible light response, low hydrogen production efficiency, and high cost of existing photocatalysts for hydrogen production by photolysis of water

Method used

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  • Preparation method of catalyst for photo-catalytically splitting water to produce hydrogen
  • Preparation method of catalyst for photo-catalytically splitting water to produce hydrogen
  • Preparation method of catalyst for photo-catalytically splitting water to produce hydrogen

Examples

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Effect test

Embodiment 1

[0022] Add 10 g of urea into a 50 mL ceramic crucible with a lid, place the crucible in a muffle furnace, raise it from room temperature to 550 °C at a rate of 2.5 °C / min, and keep the temperature constant for 2 hours. After calcination, cool to room temperature, grind the sample in an agate mortar to obtain a yellow powder, namely g-C 3 N 4 polymer material. Under the condition of nitrogen protection, weigh 108mgg-C 3 N 4 Add the polymer material to 120mL of freshly dried tetrahydrofuran solution, ultrasonicate for 5min, then add 0.55g of metal lithium and 5.08g of naphthalene to the dispersion, the solution turns dark green and then keep stirring for 1h, then use an automatic injector to 1-Bromododecane was added to the above solution at a speed of 100°C until the green color of the solution disappeared, and the reaction was continued for 12 h under the protection of nitrogen. After the reaction, add ethanol to the above reactant to remove unreacted lithium metal, centri...

Embodiment 2

[0025] Add 10 g of urea into a 50 mL ceramic crucible with a lid, place the crucible in a muffle furnace, raise it from room temperature to 550 °C at a rate of 2.5 °C / min, and keep the temperature constant for 2 hours. After calcination, cool to room temperature, grind the sample in an agate mortar to obtain a yellow powder, namely g-C 3 N 4 polymer material. Under the condition of nitrogen protection, weigh 108mgg-C 3 N 4 Add the polymer material to 120mL of freshly dried tetrahydrofuran solution, ultrasonicate for 5min, then add 0.55g of metal lithium and 5.08g of naphthalene to the dispersion, the solution turns dark green and then keep stirring for 1h, then use an automatic injector to 1-Bromododecane was added to the above solution at a speed of 100°C until the green color of the solution disappeared, and the reaction was continued for 12 h under the protection of nitrogen. After the reaction, add ethanol to the above reactant to remove unreacted lithium metal, centri...

Embodiment 3

[0027] Add 10 g of urea into a 50 mL ceramic crucible with a lid, place the crucible in a muffle furnace, raise it from room temperature to 550 °C at a rate of 2.5 °C / min, and keep the temperature constant for 2 hours. After calcination, cool to room temperature, grind the sample in an agate mortar to obtain a yellow powder, namely g-C 3 N 4 polymer material. Under the condition of nitrogen protection, weigh 368mgg-C 3 N 4 Add the polymer material to 120mL of freshly dried tetrahydrofuran solution, ultrasonicate for 5min, then add 0.21g of metal lithium and 2.56g of naphthalene to the dispersion, the solution turns dark green, and then keep stirring for 1h, and then use an automatic injector at 10mL / h 1-Bromo-n-hexane was added to the above solution at a speed of 100°C until the green color of the solution disappeared, and the reaction was continued for 12 h under the protection of nitrogen. After the reaction, add ethanol to the above reactant to remove unreacted lithium ...

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Abstract

The invention discloses a preparation method of a catalyst for photo-catalytically splitting water to produce hydrogen and relates to nano materials. The preparation method includes: placing urea into a ceramic crucible with a cover, and calcining in a muffle furnace to obtain yellow g-C3N4 polymer material; under nitrogen protection, ultrasonically dispersing the g-C3N4 polymer material into tetrahydrofuran solution, using lithium metal as the electron donor and naphthalene as the first electron acceptor, performing solution-phase stripping in the presence of halogenated hydrocarbon, adding ethanol into the reaction product after reaction to remove unreacted lithium metal, centrifuging, washing the obtained solid product, and drying to obtain g-C3N4 nano-plates; ultrasonically dispersing the g-C3N4 nano-plates into water, adding graphene oxide, continuing ultrasonic dispersion to obtain a mixed solution, transferring the mixed solution into a reaction kettle, rising temperature to 140-200 DEG C, keeping the temperature for 2-12 hours, then cooling to room temperature, performing suction filtration to obtain solid product, and performing vacuum drying to obtain the catalyst for photo-catalytically splitting water to produce hydrogen.

Description

technical field [0001] The invention relates to nanometer materials, in particular to a preparation method of a catalyst for hydrogen production by photolysis of water. Background technique [0002] Hydrogen energy is an ideal secondary energy source with no pollution, high calorific value, and wide application. The use of solar energy to split water to produce hydrogen is of great significance to solve problems such as energy shortage and environmental pollution. However, the existing solar photocatalysts for hydrogen production from water splitting generally require expensive and scarce metal materials as cocatalysts, and have weak visible light response and low hydrogen production efficiency. How to prepare photocatalysts with good stability, strong response to visible light, high hydrogen production efficiency, and low price have become an urgent problem in the field of hydrogen production. [0003] Graphite carbon nitride (g-C 3 N 4 ) is a polymer semiconductor mater...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/10C01B3/04
CPCC01B3/042B01J27/24C01B2203/1094B01J35/61B01J35/39Y02E60/36
Inventor 邓顺柳宋雪欢谢素原
Owner XIAMEN UNIV
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