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Preparation method of porous g-C3N4 photocatalyst

A photocatalyst, g-c3n4 technology, applied in the field of photocatalytic materials, can solve the problems of small specific surface area, decreased photocatalytic performance, low light utilization rate, etc., achieve high specific surface area, improve photocatalytic performance, and improve light absorption range. Effect

Inactive Publication Date: 2020-03-24
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, g-C obtained by traditional preparation methods 3 N 4 , due to its small specific surface area, low utilization rate of visible light, high recombination rate of photogenerated electrons and other defects, resulting in a decline in photocatalytic performance

Method used

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  • Preparation method of porous g-C3N4 photocatalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A porous g-C 3 N 4 The preparation method of photocatalyst is characterized in that, comprises the following steps:

[0022] 1) Weigh 0.5g of ammonium oxalate, add it to a 100mL reactor, add 20mL of deionized water, place the reactor in an ultrasonic cleaner for ultrasonic treatment for 20min, and prepare an ammonium oxalate solution.

[0023] 2) Weigh 2.5g of melamine and add it into the ammonium oxalate solution described in step 1) to obtain a mixed suspension.

[0024] The melamine described in step 2) is powder (200 mesh), produced by Chengdu Kelong Chemical Reagent Factory, and the production batch number is 2015041401.

[0025] 3) Ultrasonicate the mixed suspension solution for 60 min. The solid matter in the mixed suspension solution was separated, and the separated solid matter was dried at 80° C. for 6 h.

[0026] 4) Grinding the solid matter to 200 mesh.

[0027] 5) Put the ground solid substance into a corundum crucible with a cover, cover it and put it...

Embodiment 2

[0029] A porous g-C 3 N 4 The preparation method of photocatalyst is characterized in that, comprises the following steps:

[0030] 1) Weigh 0.5g of ammonium oxalate, add it to a 100mL reactor, add 20mL of deionized water, place the reactor in an ultrasonic cleaner for ultrasonic treatment for 20min, and prepare an ammonium oxalate solution.

[0031] 2) Weigh 5 g of melamine and add it into the ammonium oxalate solution described in step 1) to obtain a mixed suspension.

[0032] The melamine described in step 2) is powder (200 mesh), produced by Chengdu Kelong Chemical Reagent Factory, and the production batch number is 2015041401.

[0033] 3) Ultrasonicate the mixed suspension solution for 60 min. The solid matter in the mixed suspension solution was separated, and the separated solid matter was dried at 80° C. for 6 h.

[0034] 4) Grinding the solid matter to 200 mesh.

[0035] 5) Put the ground solid substance into a corundum crucible with a cover, cover it and put it ...

Embodiment 3

[0037] A porous g-C 3 N 4 The preparation method of photocatalyst is characterized in that, comprises the following steps:

[0038] 1) Weigh 0.5g of ammonium oxalate, add it to a 100mL reactor, add 20mL of deionized water, place the reactor in an ultrasonic cleaner for ultrasonic treatment for 20min, and prepare an ammonium oxalate solution.

[0039] 2) Weigh 7.5g of melamine and add it into the ammonium oxalate solution described in step 1) to obtain a mixed suspension.

[0040] The melamine described in step 2) is powder (200 mesh), produced by Chengdu Kelong Chemical Reagent Factory, and the production batch number is 2015041401.

[0041] 3) Ultrasonicate the mixed suspension solution for 60 min. The solid matter in the mixed suspension solution was separated, and the separated solid matter was dried at 80° C. for 6 h.

[0042] 4) Grinding the solid matter to 200 mesh.

[0043] 5) Put the ground solid substance into a corundum crucible with a cover, cover it and put it...

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Abstract

The invention provides a preparation method of a porous g-C3N4 photocatalyst. The method comprises the following steps: 1) weighing ammonium oxalate, and preparing an ammonium oxalate solution; 2) weighing melamine, and adding the melamine into the ammonium oxalate solution obtained in the step 1) to obtain a mixed suspension; 3) after a reaction, separating the solid substance in the mixed suspension, and drying; 4) grinding the solid substance; and 5) calcining the grinded solid substance to obtain the porous g-C3N4 photocatalyst. The prepared g-C3N4 catalyst has a high specific surface area, and improves the light absorption range of g-C3N4 so as to improve the photocatalytic performance of the material.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, in particular to a porous graphite phase carbon nitride (g-C 3 N 4 ) Preparation method of photocatalyst. Background technique [0002] Due to the depletion of fossil fuels, the increasing energy demand and the challenges of environmental issues, photocatalytic technology has received extensive attention. As one of the most promising methods to solve these problems, semiconductor photocatalysis technology provides a green way for the application of clean energy production, environmental governance and other fields by utilizing solar energy. Graphite carbon nitride (g-C 3 N 4 ), as a novel, inexpensive, and thermally stable metal-free photocatalyst, has attracted great attention in the field of photocatalysis. [0003] However, g-C obtained by traditional preparation methods 3 N 4 , due to its small specific surface area, low utilization rate of visible light, high recombin...

Claims

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Application Information

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IPC IPC(8): C01B21/082C02F1/30B01J27/24C02F101/34C02F101/36C02F101/38
CPCC01B21/0605C02F1/30B01J27/24C02F2305/10C02F2101/36C02F2101/38C02F2101/34C01P2006/12B01J35/39
Inventor 杨臣杨剑焦庆瑞胡广刘兰段序刘清才任山黎江玲孔明
Owner CHONGQING UNIV
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