Preparation method of Z-type g-C3N4@Ag@Ag3PO4 composite photocatalyst

A composite light and catalyst technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., to achieve the effects of broadening the spectral response range, simple and easy control of the reaction process, and improving stability

Inactive Publication Date: 2017-05-31
GUANGXI UNIV FOR NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And with Ag nanoparticles as the bond, as g-C 3 N 4 Valence band holes and Ag 3 PO 4 Conduction band electronic recombination bridge, precisely controlled

Method used

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  • Preparation method of Z-type g-C3N4@Ag@Ag3PO4 composite photocatalyst

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Embodiment 1

[0024] (1) g-C 3 N 4 Preparation: Weigh 30g of urea in a covered ceramic crucible, place it in a muffle furnace, heat from room temperature 25°C to 400°C in an air atmosphere, keep the temperature at 400°C for 2 hours, continue heating to 550°C, and keep the temperature at 550°C 2h, naturally cooled to room temperature 25°C, and the light yellow powder obtained by grinding the sample is g-C 3 N 4 Material.

[0025] (2)g-C 3 N 4 Preparation of @Ag: Weigh 0.68g (4.0mmol) of silver nitrate and dissolve it in 50mL of deionized water, ultrasonically dissolve it for 5 minutes, and stir in a dark room for 10 minutes; weigh 40mg (1) of the obtained g-C 3 N 4Add to silver nitrate solution, disperse evenly by ultrasonication for 10min, continue to avoid light and stir at 600rpm for 1h; prepare 180g / L glucose solution, take 10mL and add to g-C 3 N 4 In a mixed solution with silver nitrate, stir and react in a water bath at 60°C in the dark for 2h; stop stirring and let stand for ...

Embodiment 2

[0031] (1) g-C 3 N 4 Preparation: Weigh 30g of urea in a covered ceramic crucible, place it in a muffle furnace, heat from room temperature 25°C to 400°C in an air atmosphere, keep the temperature at 400°C for 2 hours, continue heating to 550°C, and keep the temperature at 550°C 2h, naturally cooled to room temperature 25°C, and the light yellow powder obtained by grinding the sample is g-C 3 N 4 Material.

[0032] (2)g-C 3 N 4 Preparation of @Ag: Weigh 6mg (12wt%) silver nitrate and dissolve it in 150mL deionized water, ultrasonically dissolve for 5min, stir in dark room for 10min; weigh 44mg g-C 3 N 4 Add silver nitrate solution, disperse evenly by ultrasonication for 10min, continue to avoid light and stir at 600rpm for 1h; prepare 30g / L sodium borohydride solution, take 0.3mL and add the above g-C 3 N 4 In a mixed solution with silver nitrate, stir and react in the dark at 25°C for 1 hour; stop stirring and let it stand for 0.5 hours, then centrifuge, wash, and dry...

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Abstract

The invention discloses a preparation method of a Z-type g-C3N4@Ag@Ag3PO4 composite photocatalyst. The preparation method comprises the following steps of firstly, putting urea into a ceramic crucible with a cover, putting into a muffle furnace, and calcining under air atmosphere, so as to obtain a g-C3N4 semiconductor material; by using the g-C3N4 as a carrier, respectively using silver nitrate and sodium dihydrogen phosphate as a silver ion source and a phosphate ion source, respectively using glucose and sodium borohydride as reduction agents, and using iron nitrate nonahydrate as an oxidant, finely preparing the Z-type g-C3N4@Ag@Ag3PO4 composite material with Ag nanoparticles between the g-C3N4 and Ag3PO4. The preparation method of the Z-type g-C3N4@Ag@Ag3PO4 composite photocatalyst has the advantages that the method is simple, the control is easy, the operation is convenient, the cost is low, the green and non-pollution effects of raw materials are realized, and the like; the spectrum absorbing range is effectively widened, the compounding of photon-generated carriers is effectively decreased, and the application prospect and potential practical value are good.

Description

technical field [0001] The present invention relates to a Z type g-C 3 N 4 @Ag@Ag 3 PO 4 The invention discloses a method for preparing a composite photocatalyst, belonging to the technical field of photocatalytic materials and preparation thereof. Background technique [0002] In recent years, with the development of modern industry, problems such as energy crisis and environmental degradation have become more and more serious, making human beings face severe challenges for survival. Semiconductor photocatalysis can convert solar energy into chemical energy and directly degrade or mineralize organic pollutants, so it is highly valued by governments and scientific researchers around the world. Single-component semiconductors have problems such as high exciton binding energy for photogenerated carriers, severe photogenerated electron-hole recombination, low quantum efficiency, and large band gap, which greatly limit their application in the field of photocatalysis. Appli...

Claims

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Application Information

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IPC IPC(8): B01J27/24
CPCB01J27/24B01J35/004
Inventor 黄在银万婷李星星覃方红王一惠李翠
Owner GUANGXI UNIV FOR NATITIES
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