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Preparation method of surface carbon vacancy modified graphite-phase carbon nitride photocatalyst and application of preparation method in production of hydrogen peroxide

A phase carbon nitride light, carbon vacancy technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as low generation efficiency, achieve strong light absorption range, cheap and easy raw materials The effect of easy industrial production

Inactive Publication Date: 2018-10-26
WUHAN UNIV
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Problems solved by technology

But in the absence of ethanol H 2 o 2 The production efficiency is very low

Method used

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  • Preparation method of surface carbon vacancy modified graphite-phase carbon nitride photocatalyst and application of preparation method in production of hydrogen peroxide
  • Preparation method of surface carbon vacancy modified graphite-phase carbon nitride photocatalyst and application of preparation method in production of hydrogen peroxide
  • Preparation method of surface carbon vacancy modified graphite-phase carbon nitride photocatalyst and application of preparation method in production of hydrogen peroxide

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Embodiment 1

[0024] Step 1. Put 4g of melamine in a 30ml ceramic crucible with a cover, then put the crucible into the center of the muffle furnace, and heat it at 20°C min -1 Raise the temperature to 520°C and keep it warm for 4 hours. After the muffle furnace cools down to room temperature naturally, take out the sample and grind it into a uniform powder with an agate mortar. The sample is ordinary g-C 3 N 4 ;

[0025] Step 2, the prepared common g-C 3 N 4 Put it in a 30ml ceramic crucible with a cover, put it into a tube furnace, feed high-purity argon (99.99%) to first expel the air inside, and then heat it in an argon atmosphere at 20°C min -1 The heating rate was raised to 520°C and calcined for 2 hours. After the tube furnace was naturally cooled to room temperature, the sample was taken out and ground into a uniform powder. This sample is g-C modified with surface carbon vacancies 3 N 4 , is named Cv-g-C 3 N 4 ;

[0026] Step 3, Cv-g-C obtained in step 2 respectively 3 N ...

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Abstract

The invention provides a preparation method of surface carbon vacancy modified graphite-phase carbon nitride photocatalyst and an application of the preparation method in the production of hydrogen peroxide. The preparation method has the advantages of cheap and available raw materials, simple technology, green and environmental protection, easy industrial production and the like. Compared with pure-phase g-C3N4, surface carbon vacancy modified g-C3N4 has the advantages that the band gap of g-C3N4 is narrowed and electron delocalization is enlarged due to existence of carbon vacancy, the carbon vacancy becomes the center in charge capture, and the capacity of the surface carbon vacancy modified g-C3N4 to produce H2O2 under the same condition is 14 times that of common g-C3N4 due to existence of the carbon vacancy.

Description

technical field [0001] The invention belongs to the technical field of preparation of photocatalytic materials and treatment of environmental pollutants, in particular to a carbon vacancy modified graphite phase carbon nitride (g-C 3 N 4 ) preparation method and its use in the production of hydrogen peroxide (H 2 o 2 ) process application. Background technique [0002] Hydrogen peroxide (H 2 o 2 ) is a colorless and transparent strong oxidizing agent. Since its reaction product is only water or oxygen, it is often used as an environmentally friendly green oxidant. h 2 o 2 It is widely used in all aspects of production and life, such as pulp and textile bleaching, chemical synthesis, environmental protection, medical and food sterilization, etc. From the perspective of hydrogen peroxide production technology, there are two relatively mature production methods at present, namely electrolysis method and anthraquinone method. Among them, the electrolytic method has a s...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/00C01B15/027C01B21/06
CPCC01B15/027C01B21/0605B01J27/24B01J35/39
Inventor 曾玉彬王传义李淑娜董国辉刘桂梅
Owner WUHAN UNIV
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