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Sulfur-doped g-C3N4/TiO2 heterojunction photocatalyst, and preparation method and application thereof

A photocatalyst, C3N4 technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as poor catalytic performance of visible light, and achieve strong photocatalytic degradation of pollutants. Application prospect, low cost effect

Inactive Publication Date: 2018-04-20
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, especially the deficiencies of the poor catalytic performance of visible light, the present invention provides a sulfur-doped g-C 3 N 4 / TiO 2 Heterojunction photocatalyst and its preparation method and application

Method used

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  • Sulfur-doped g-C3N4/TiO2 heterojunction photocatalyst, and preparation method and application thereof
  • Sulfur-doped g-C3N4/TiO2 heterojunction photocatalyst, and preparation method and application thereof
  • Sulfur-doped g-C3N4/TiO2 heterojunction photocatalyst, and preparation method and application thereof

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Embodiment 1

[0040] A sulfur-doped C 3 N 4 / TiO 2 The preparation method of heterojunction photocatalyst comprises steps as follows:

[0041] (1) Preparation of sulfur-doped C by thermal polycondensation 3 N 4 : Dissolve melamine and thiocyanic acid in equal molar ratio in hot water and stir and mix evenly for 10 minutes, then mix the two and transfer them to a polytetrafluoroethylene reactor for hydrothermal reaction. The specific details of the hydrothermal reaction Conditions: Place the reaction kettle in an oven at 100°C for 4 hours, take it out after cooling, wash it several times with deionized water, and then put it in an oven to dry. Put it into a muffle furnace for calcination, the calcination temperature is 550°C, the time is 4h, and the heating rate is 5°C / min;

[0042] (2) Preparation of pure TiO by solvothermal method 2 Nanoparticles: select n-tetrabutyl titanate as the titanium source, add 1ml of n-butyl titanate to 40ml of isopropanol, and at the same time add 40ml of ...

Embodiment 2

[0064] A sulfur-doped g-C 3 N 4 / TiO 2 The preparation method of heterojunction photocatalyst comprises steps as follows:

[0065] (1) Preparation of sulfur-doped C by thermal polycondensation 3 N 4 : Dissolve melamine and thiocyanic acid in equal molar ratio in hot water and stir and mix evenly for 10 minutes, then mix the two and transfer them to a polytetrafluoroethylene reactor for hydrothermal reaction. The specific details of the hydrothermal reaction Conditions: Place the reaction kettle in an oven at 100°C for 4 hours, take it out after cooling, wash it several times with deionized water, and then put it in an oven to dry. Put it into a muffle furnace for calcination, calcine at 520°C for 2h, then raise the temperature to 580°C, and calcine for 4h, with a heating rate of 5°C / min;

[0066] (2) Preparation of pure TiO by solvothermal method 2 Nanoparticles: Select n-tetrabutyl titanate as the titanium source, add 5ml of n-butyl titanate to 40ml of ethanol, and at t...

Embodiment 3

[0069] A sulfur-doped g-C 3 N 4 / TiO 2 The preparation method of heterojunction photocatalyst comprises steps as follows:

[0070] (1) Preparation of sulfur-doped C by thermal polycondensation 3 N 4 : Dissolve melamine and thiocyanic acid in equal molar ratio in hot water and stir and mix evenly for 10 minutes, then mix the two and transfer them to a polytetrafluoroethylene reactor for hydrothermal reaction. The specific details of the hydrothermal reaction Conditions: Place the reaction kettle in an oven at 100°C for 4 hours, take it out after cooling, wash it several times with deionized water, and then put it in an oven to dry. Put it into a muffle furnace for calcination, calcine at 550°C for 2h, then raise the temperature to 580°C, and calcine for 4h at a heating rate of 10°C / min;

[0071] (2) Preparation of pure TiO by solvothermal method 2 Nanoparticles: Select n-tetrabutyl titanate as the titanium source, add 1ml of n-butyl titanate to 40ml of ethanol, and at the...

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Abstract

The invention relates to a sulfur-doped g-C3N4 / TiO2 heterojunction photocatalyst, and a preparation method and an application thereof. The chemical components of the catalyst are sulfur-doped C3N4 andTiO2 nano-particles, the microstructure of the catalyst contains a rod-like and lamellate structure, and the TiO2 nano-particles are distributed on the surface of the rod-like and lamellae structure.S-C3N4 prepared by mixing and calcining melamine and trithiocyanuric acid is compounded with TiO2 prepared by a solvothermal technology of tetra-n-butyl titanate to prepare the sulfur-doped g-C3N4 / TiO2 compound. The preparation method has the advantages of simple process, low cost and environment protection, and the prepared photocatalyst composite material has a very good application prospect inwastewater treatment.

Description

technical field [0001] The invention belongs to the field of nanocomposite materials, and specifically discloses a sulfur-doped C 3 N 4 / TiO 2 Nanocomposites and their preparation methods and applications. Background technique [0002] In today's society, the problems of environmental pollution and energy shortage are becoming more and more serious. Photocatalysis, as an emerging technology, is more and more used in the generation of new energy and The field of environmental pollution control. TiO 2 As one of the most common photocatalysts, it is widely used in sewage treatment because of its non-toxicity, good chemical stability, suitable energy band position and low price. However, due to TiO 2 The bandgap width is wide, and it can only respond in the ultraviolet region and the recombination rate of photogenerated carriers is high, which seriously limits the performance of TiO2. 2 practical application. [0003] In recent years, carbon nitride has been widely used ...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/02B01J37/02B01J37/10C02F1/30
CPCC02F1/30B01J27/24B01J37/0201B01J37/082B01J37/10C02F2305/10B01J35/50B01J35/39
Inventor 徐世平赵玉孙翔岳敏岳钦艳高宝玉
Owner SHANDONG UNIV
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