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Composite visible-light-responding photocatalyst material, and preparation method and application thereof

A photocatalyst and visible light technology, used in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of expensive preparation of basic materials, limited development and wide application, and short service life of photocatalysts. , to achieve the effects of improved photocatalytic degradation efficiency, improved photocatalytic degradation efficiency, and significant absorption capacity

Inactive Publication Date: 2019-12-06
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still some problems in the composite visible light-responsive catalyst materials, such as the complicated preparation process, the expensive preparation of basic materials, and the short service life of visible light catalysts caused by photocorrosion.
Therefore, it is difficult to apply to actual industrial production, which limits the development and wide application of this technology.

Method used

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  • Composite visible-light-responding photocatalyst material, and preparation method and application thereof
  • Composite visible-light-responding photocatalyst material, and preparation method and application thereof
  • Composite visible-light-responding photocatalyst material, and preparation method and application thereof

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Experimental program
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Embodiment 1

[0056] (1) Nanosheet structure SLg-C 3 N 4 Preparation of:

[0057] Preparation of nanosheet g-C by secondary calcination 3 N 4 (Abbreviation: SL g-C 3 N 4 ): Dissolve urea and melamine in a mass ratio of 6:1, then dry the mixed solution at 80°C, grind the obtained powder and put it into an alumina crucible, then place the crucible in a muffle furnace, The rate of ℃ / min-15℃ / min is raised to 250℃-350℃ and kept for 60-100min to obtain block g-C 3 N 4 ;Take block g-C 3 N 4 Put it into a crucible after grinding, place the crucible in a muffle furnace for secondary calcination, raise the temperature at a rate of 10°C / min-15°C / min to 350°C-520°C and keep it for 60-100min to obtain g-C 3 N 4 Powder; finally put it in isopropanol and ultrasonically peel it for 1h-3h, centrifuge and dry to get nanosheet g-C 3 N 4 , which is SL g-C 3 N 4 ;

[0058] (2) Preparation of aminated graphene oxide NGO:

[0059] Preparation of aminated graphene oxide NGO using ethylenediamine: a...

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Abstract

The invention belongs to the technical field of environment and water treatment, and discloses a composite visible-light-responding photocatalyst material, and a preparation method and application thereof. The preparation method comprises the following steps: preparing graphite-like carbon nitride (g-C3N4) by adopting a thermal polycondensation synthesis process, and then carrying out secondary calcination on the g-C3N4 by adopting a thermal oxidation etching process so as to obtain graphitic carbon nitride (SL g-C3N4) of a monatomic nanometer lamellar structure; reducing graphene oxide (GO) by using ethylenediamine, and introducing an amino group to prepare aminated graphene oxide (NGO) with electropositivity; subjected SL g-C3N4 and NGO to ultrasonic mixing so as to prepare an SL g-C3N4 / NGO heterojunction. Through photocatalytic degradation research on the cationic dye rhodamine B and the anionic dye methyl orange, the optimal preparation conditions of the composite visible-light catalyst heterojunction are obtained, and the visible-light catalytic activity and stability of the composite photocatalyst material are significantly improved.

Description

technical field [0001] The invention belongs to the technical field of environment and water treatment, and in particular relates to a composite visible light-responsive photocatalyst material and its preparation method and application. Background technique [0002] Since the 21st century, with the rapid development of social economy and industry, the problem of water pollution has become increasingly serious. Industries such as textiles, pharmaceuticals, papermaking, chemicals, coking, printing and dyeing, coatings, and leather have made great progress, and the amount of industrial wastewater produced has also increased. Most of these industrial wastewaters contain toxic and harmful substances, and their BOD 5 / COD Cr If it is lower than 0.3, it belongs to organic wastewater that is difficult to biodegrade. At the same time, the discharge of untreated industrial wastewater into water bodies seriously damages the ecosystem of aquatic communities and endangers the health o...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30C02F101/34C02F101/36C02F101/38
CPCB01J27/24C02F1/30C02F2101/34C02F2101/36C02F2101/38C02F2101/40C02F2101/308C02F2305/10B01J35/39
Inventor 李冬梅张博雯王逸之湛咏诗谢昱黄明珠冯力
Owner GUANGDONG UNIV OF TECH
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