Photocatalyst for complete water splitting and its preparation method and application, reaction method for photocatalytic complete splitting of water and catalytic mixture

A photocatalyst and water splitting technology, applied in the field of photocatalysis, can solve the problems of difficulty in realizing hydrogen production and oxygen production, high recombination rate, etc., and achieve the effect of convenient and accurate configuration of the catalytic system, low cost, and cost reduction.

Active Publication Date: 2020-05-19
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the extremely high recombination rate of photogenerated electrons and holes in graphitic carbon nitride itself makes it difficult to completely split water to produce hydrogen and oxygen.

Method used

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  • Photocatalyst for complete water splitting and its preparation method and application, reaction method for photocatalytic complete splitting of water and catalytic mixture
  • Photocatalyst for complete water splitting and its preparation method and application, reaction method for photocatalytic complete splitting of water and catalytic mixture
  • Photocatalyst for complete water splitting and its preparation method and application, reaction method for photocatalytic complete splitting of water and catalytic mixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0038] Step 1: Put 10 g of urea in an alumina crucible, cover it and bake it at 600°C for 3 hours to prepare graphite phase carbon nitride.

[0039]Step 2: Add the graphite phase carbon nitride powder prepared in step 1 into pure water (CN-0Ni-0CoO x ),carry out testing. Specific steps are as follows:

[0040] 1) Add 50.0 mg of graphitic carbon nitride into a reactor with a volume of 100 mL, and add deionized water so that the total volume of the photocatalytic reaction solution is 80 mL;

[0041] 2) Purge the reactor with argon gas for 30 minutes before lighting to remove the oxygen in the reaction system;

[0042] 3) Turn on the magnetic stirrer and turn on the xenon lamp power supply.

Embodiment example 2

[0044] Step 1: Put 10 g of urea in an alumina crucible, cover it and bake it at 600°C for 3 hours to prepare graphite phase carbon nitride.

[0045] Step 2: Prepare a metal nickel nanoparticle dispersion. 17.5mg of Ni(NO 3 ) 2 ·6H 2 O. 100.0mg of PVPK30 and 20mL of ethylene glycol were added to a 125mL three-necked flask and completely dissolved, then the three-necked flask was heated and stirred in an oil bath at 120°C, and 63.0mg was added to the solution after the temperature stabilized NaBH 4 (NaBH 4 The mass is 18 times of the mass of metallic nickel), and after heating and stirring for 2 hours, a transparent solution is obtained, which is a dispersion of metallic nickel nanoparticles. Theoretically, the mass of metallic nickel nanoparticles in the dispersion is 3.5 mg.

[0046] Step 3: Add the graphite phase carbon nitride powder prepared in step 1 and the metal nickel nanoparticle dispersion prepared in step 2 into pure water (CN-Ni) for testing. Specific steps ar...

Embodiment example 3

[0051] Step 1: Put 10 g of urea in an alumina crucible, cover it and bake it at 600°C for 3 hours to prepare graphite phase carbon nitride.

[0052] Step 2: Prepare a metal nickel nanoparticle dispersion. 17.5mg of Ni(NO 3 ) 2 ·6H 2 O. 100.0mg of PVPK30 and 20mL of ethylene glycol were added to a 125mL three-necked flask and completely dissolved, then the three-necked flask was heated and stirred in an oil bath at 120°C, and 63.0mg was added to the solution after the temperature stabilized NaBH 4 (NaBH 4 The mass is 18 times of the mass of metallic nickel), and after heating and stirring for 2 hours, a transparent solution is obtained, which is a dispersion of metallic nickel nanoparticles. Theoretically, the mass of metallic nickel nanoparticles in the dispersion is 3.5 mg.

[0053] Step 3: the graphite phase carbon nitride powder prepared in step 1 and the metal nickel nanoparticle dispersion prepared in step 2 and 3 mg of Co(NO 3 ) 2 ·6H 2 O was added to pure water ...

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Abstract

The invention discloses a catalyst and a reaction method for photocatalytic complete water decomposition based on non-noble metal supported graphite-phase carbon nitride. According to the method, graphite-phase carbon nitride, metal nickel nanoparticles and a cobalt precursor are directly added into pure water, the cobalt precursor is converted into CoOx through photoreaction, and the metal nickelnanoparticles and the CoOx act synergistically as a cocatalyst, so that the visible light catalysis of the non-noble metal supported graphite-phase carbon nitride is achieved, and water is completelydecomposed to produce hydrogen and oxygen. The method is simple to operate and good in repeatability, all related materials are low in preparation cost, the solid phase can be recovered from a reaction system after reaction to obtain the photocatalyst, and the photocatalyst is used for photocatalytic reaction for complete water decomposition. According to the catalyst and the reaction method, noble metals are not used, the construction system is simple and convenient, and the cost of the photocatalytic reaction for complete water decomposition can be reduced.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a photocatalyst for completely decomposing water, a preparation method and application thereof, a reaction method for photocatalyzing completely decomposing water, and a catalytic mixed liquid. Background technique [0002] The rapid progress of science and technology and the rapid development of the industrialization process have increased the demand for energy. The continuous consumption and non-renewability of conventional energy will lead to a new energy crisis. At the same time, the development and utilization of fossil energy have caused serious environmental pollution. affect people's life and health. In order to solve the two major problems of energy shortage and environmental pollution that threaten human survival and development, the development of clean and pollution-free renewable energy has attracted great attention. The basic theory and key techn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J37/08B01J37/18C01B3/04C01B13/02
CPCB01J27/24B01J35/0013B01J35/004B01J37/08B01J37/18C01B3/042C01B13/0207Y02E60/36
Inventor 师进文程诚毛柳浩郭烈锦
Owner XI AN JIAOTONG UNIV
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