Sulfur-doped g-C3N4/C-dot porous composite photocatalyst and preparing method and application thereof

A C3N4, c-dot technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., to achieve the effect of increased specific surface area, low cost, and increased specific surface area

Active Publication Date: 2019-03-01
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, g-C is currently retrofitted with C-dot 3 N 4 Morphology, thus preparing sulfur-doped g-C 3 N 4 / C-dot porous composite photocatalyst, no report

Method used

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  • Sulfur-doped g-C3N4/C-dot porous composite photocatalyst and preparing method and application thereof
  • Sulfur-doped g-C3N4/C-dot porous composite photocatalyst and preparing method and application thereof
  • Sulfur-doped g-C3N4/C-dot porous composite photocatalyst and preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A sulfur-doped g-C 3 N 4 The preparation method of / C-dot porous composite photocatalyst comprises steps as follows:

[0046] (1) By stirring and mixing melamine and thiocyanuric acid, sulfur-doped C 3 N 4 (S-C 3 N 4 )Precursor:

[0047] Dissolve melamine and thiocyanic acid in equal molar ratios in hot water at 90°C and mix evenly for 10 minutes, then mix the two and transfer them to a polytetrafluoroethylene reactor for hydrothermal reaction. Specific conditions: put the reaction kettle in an oven at 100°C for 4 hours, take it out after cooling, wash it with deionized water several times, and then put it in an oven to dry to obtain S-C 3 N 4 precursors.

[0048] (2) carbonization of carbon-containing organic matter by alkali-assisted ultrasonic method to obtain C-dot nanoparticles:

[0049] Dissolve 9g of glucose in 50mL of deionized water, stir until it forms a clear solution, then add 0.8g of sodium hydroxide and stir to mix evenly. The ultrasonic time is ...

Embodiment 2

[0056] A sulfur-doped g-C 3 N 4 The preparation method of / C-dot porous composite photocatalyst comprises steps as follows:

[0057] (1) Sulfur-doped g-C was prepared by stirring and mixing melamine and thiocyanuric acid 3 N 4 (S-C 3 N 4 )Precursor:

[0058] Dissolve melamine and thiocyanic acid in equal molar ratios in hot water at 90°C and mix evenly for 10 minutes, then mix the two and transfer them to a polytetrafluoroethylene reactor for hydrothermal reaction. Specific conditions: put the reaction kettle in an oven at 100°C for 4 hours, take it out after cooling, wash it with deionized water several times, and then put it in an oven to dry to obtain S-C 3 N 4 precursors.

[0059] (2) C-dot nanoparticles were obtained by carbonizing carbon-containing organic matter by alkali-assisted ultrasonic method: Dissolve 9 g of glucose in 50 mL of deionized water, stir until it forms a clear solution, then add 0.8 g of sodium hydroxide and stir to mix evenly , and the obtai...

Embodiment 3

[0064] A sulfur-doped g-C 3 N 4 The preparation method of / C-dot porous composite photocatalyst comprises steps as follows:

[0065] (1) Sulfur-doped g-C was prepared by stirring and mixing melamine and thiocyanuric acid 3 N 4 (S-C 3 N 4 )Precursor:

[0066] Dissolve melamine and thiocyanic acid in equal molar ratios in hot water at 90°C and mix evenly for 10 minutes, then mix the two and transfer them to a polytetrafluoroethylene reactor for hydrothermal reaction. Specific conditions: put the reaction kettle in an oven at 100°C for 4 hours, take it out after cooling, wash it with deionized water several times, and then put it in an oven to dry to obtain S-C 3 N 4 precursors.

[0067] (2) C-dot nanoparticles were obtained by carbonizing carbon-containing organic matter by alkali-assisted ultrasonic method: Dissolve 9 g of glucose in 50 mL of deionized water, stir until it forms a clear solution, then add 0.8 g of sodium hydroxide and stir to mix evenly , and the obtai...

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Abstract

The invention relates to a sulfur-doped g-C3N4/C-dot porous composite photocatalyst and a preparing method and application thereof. A chemical composition of the photocatalyst comprises sulfur-doped C3N4 and C-dot nano-particles, and a microstructure of the catalyst comprises rod-shaped and porous structures. An S-C3N4 precursor prepared by mixing tripolycyanamide and trithiocyanuric acid and a C-dot prepared with the alkali-assisted ultrasound method are compositely calcined, and the S-C3N4/C-dot nanometer composite photocatalyst is prepared. By means of the sulfur-doped g-C3N4/C-dot photocatalyst prepared with the method, absorption of a visible light area can be enhanced, and transferring of photo-induced charges can be promoted; meanwhile, as the basal morphology is adjusted and controlled by the C-dot, the porous structure is remarkably formed, the specific area is increased, the preparing method is low in cost, simple in technology and environmentally friendly, and a prepared photocatalysis composite material has good application prospects when being used for treating wastewater.

Description

technical field [0001] The invention belongs to the field of nanocomposite materials, and specifically discloses a preparation method of a porous carbon nitride photocatalyst. Background technique [0002] Carbon Nitride (g-C 3 N 4 ) has been widely used in the field of photocatalysis because of its visible light response, low cost, stability in strong acid and strong alkali, and easy preparation. However, carbon nitride is also limited in practical applications due to its small specific surface area, weak light absorption ability, and high recombination rate of photogenerated electrons and holes. [0003] Many studies have proved that the formation of porous structure can increase the g-C 3 N 4 The specific surface area, but the currently reported synthesis usually uses template materials, including hard template methods, such as using silica as a hard template, or soft template methods, such as using P123. Templates are powerful, but their removal is usually complicat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/38
CPCB01J27/24B01J35/004C02F1/30C02F2101/38C02F2101/40
Inventor 徐世平赵玉张启亮李璐璐岳钦艳高宝玉
Owner SHANDONG UNIV
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