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Preparation method of double-hole carbon nitride composite magnetic photo-catalyst

A double-porous carbon nitride, composite magnetic technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of less photocatalytic active sites and products Single structure, small specific surface area and other problems, to achieve the effect of rich micro-mesoporous double-pore channel structure, high photocatalytic activity and high specific surface area

Pending Publication Date: 2020-02-14
GUANGXI TEACHERS EDUCATION UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

g-C 3 N 4 The advantage lies in its simple preparation process, wide source of raw materials, high chemical stability, safety and non-toxicity, etc., but the traditional g-C 3 N 4 The product obtained by the preparation method has a single structure, a small specific surface area, fewer photocatalytic active sites, and is not easy to recycle.

Method used

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  • Preparation method of double-hole carbon nitride composite magnetic photo-catalyst
  • Preparation method of double-hole carbon nitride composite magnetic photo-catalyst
  • Preparation method of double-hole carbon nitride composite magnetic photo-catalyst

Examples

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Effect test

example 1

[0027] Step 1. Carry out temperature-programmed calcination of urea, the calcination temperature is 570°C, the heating rate is 5°C / min, and the calcination time is 2h, to obtain g-C 3 N 4 ;

[0028] Step two, take Fe(NO 3 ) 3 9H 2 O is dissolved in ethylene glycol, where Fe(NO 3 ) 3 9H 2 The concentration of O is 0.25mol / L, stir to make it evenly mixed, add anhydrous sodium acetate and polyethylene glycol-400 in the mixed solution, described anhydrous sodium acetate and Fe(NO 3 ) 3 9H 2 The molar ratio of O is 4.5:1, the volume of polyethylene glycol-400 is 2% of ethylene glycol, mix evenly, heat to 200°C, keep warm for 22h, after cooling, wash with deionized water, suction filter, dry, and then Calcined at 470°C, the heating rate is 1°C / min, the calcination time is 2h, and cooled to obtain magnetic Fe 2 o 3 ;

[0029] Step 3, take g-C 3 N 4 and magnetic Fe 2 o 3 Add to absolute ethanol, in which the magnetic Fe 2 o 3 The amount added is g-C 3 N 4 5% of the...

example 2

[0031] Step 1: Carry out temperature-programmed calcination of urea, the calcination temperature is 500°C, the heating rate is 1°C / min, and the calcination time is 5h, to obtain g-C 3 N 4 ;

[0032] Step two, take Fe(NO 3 ) 3 9H 2 O is dissolved in ethylene glycol, where Fe(NO 3 )3 9H 2 The concentration of O is 0.12mol / L, stir to make it evenly mixed, add anhydrous sodium acetate and polyethylene glycol-400 in the mixed solution, described anhydrous sodium acetate and Fe(NO 3 ) 3 9H 2 The molar ratio of O is 2.5:1, the volume of polyethylene glycol-400 is 1% of ethylene glycol, mix evenly, heat to 100 ℃, keep warm for 24h, after cooling, wash with deionized water, suction filter, dry, and then Calcined at 450°C, the heating rate is 3°C / min, the calcination time is 3h, and cooled to obtain magnetic Fe 2 o 3 ;

[0033] Step 3, take g-C 3 N 4 and magnetic Fe 2 o 3 Add to absolute ethanol, in which the magnetic Fe 2 o 3 The amount added is g-C 3 N 4 1% of the m...

example 3

[0035] Step 1. Carry out temperature-programmed calcination of urea, the calcination temperature is 600°C, the heating rate is 10°C / min, and the calcination time is 1h, to obtain g-C 3 N 4 ;

[0036] Step two, take Fe(NO 3 ) 3 9H 2 O is dissolved in ethylene glycol, where Fe(NO 3 ) 3 9H 2 The concentration of O is 0.5mol / L, stir to make it evenly mixed, add anhydrous sodium acetate and polyethylene glycol-400 in the mixed solution, described anhydrous sodium acetate and Fe(NO 3 ) 3 9H 2 The molar ratio of O is 10:1, the volume of polyethylene glycol-400 is 6% of ethylene glycol, mix evenly, heat to 200°C, keep warm for 12h, after cooling, wash with deionized water, suction filter, dry, and then Calcined at 500°C, the heating rate is 5°C / min, the calcination time is 1h, and cooled to obtain magnetic Fe 2 o 3 ;

[0037] Step 3, take g-C 3 N 4 and magnetic Fe 2 o 3 Add to absolute ethanol, in which the magnetic Fe 2 o 3 The amount added is g-C 3 N 4 40% of the...

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Abstract

The invention discloses a preparation method of a double-pore carbon nitride composite magnetic photo-catalyst. The preparation method mainly comprises the following steps: carrying out programmed heating calcination on urea to prepare g-C3N4; dissolving Fe(NO3)3.9H2O as a raw material in ethylene glycol and carrying out a heating reaction with anhydrous sodium acetate and polyethylene glycol-400,and performing calcination to prepare magnetic Fe2O3; and loading the magnetic Fe2O3 on the g-C3N4 to finally prepare the composite magnetic photo-catalyst Fe2O3-g-C3N4 with a microporous-mesoporousdouble-pore channel structure. The preparation method is simple in operation, a precursor does not need to be treated and can be directly calcined, and the finally prepared product has rich microporous-mesoporous double-pore channel structures, has high specific surface area and high photo-catalytic activity, has a relatively good application prospect in the aspect of photo-catalysis, and is convenient to recycle due to loading of the magnetic Fe2O3.

Description

technical field [0001] The invention relates to the technical field of visible light photocatalysis. More specifically, the present invention relates to a method for preparing a dual-hole carbon nitride composite magnetic photocatalyst. Background technique [0002] Photocatalytic technology has been widely used in sewage treatment because it can directly use solar energy as energy, and has the characteristics of energy saving, high efficiency, complete degradation, and non-polluting products. At present, g-C with strong visible light absorption ability and narrow bandgap (2.7eV), and flexible layered structure like graphene 3 N 4 , is a good photocatalytic material. g-C 3 N 4 The advantage lies in its simple preparation process, wide source of raw materials, high chemical stability, safety and non-toxicity, etc., but the traditional g-C 3 N 4 The product obtained by the preparation method has a single structure, a small specific surface area, fewer photocatalytic act...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J23/745B01J35/10C02F1/30
CPCB01J27/24B01J23/745C02F1/30C02F2101/308C02F2305/10B01J35/33B01J35/39B01J35/69B01J35/615
Inventor 杨晶张纤千杨显德韦良龙洁清劳继游
Owner GUANGXI TEACHERS EDUCATION UNIV