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Perovskite material/organic polymer compound photocatalyst, preparation and application

A perovskite material and compound light technology, applied in the direction of organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, chemical/physical process, etc., can solve the problems that have not been introduced reasonably and effectively, Achieve the effects of promoting effective migration, improving light utilization, and efficient photolysis of water to produce hydrogen

Active Publication Date: 2015-12-23
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although cobalt titanate has been proven to exhibit superior optical properties under both ultraviolet and visible light, it has not been reasonably and effectively introduced into the field of photocatalytic applications. There is also a gap in the application of hydrogen

Method used

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  • Perovskite material/organic polymer compound photocatalyst, preparation and application
  • Perovskite material/organic polymer compound photocatalyst, preparation and application
  • Perovskite material/organic polymer compound photocatalyst, preparation and application

Examples

Experimental program
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Embodiment 1

[0033] (1) Preparation of cobalt titanate:

[0034] Co(CH 3 COO) 2 4H 2 O and tetrabutyl titanate were dissolved in 60ml of ethylene glycol at a mass ratio of 1:1 to form a dark red solution, which was stirred at room temperature for 5 hours to fully react and the solution turned into light pink. Centrifugal washing with ethanol three times, vacuum drying for 6 hours, and calcination at 700° C. for 4 hours to obtain nanorod-shaped cobalt titanate.

[0035] (2) Preparation of carbon nitride:

[0036] Prepared by thermal decomposition polymerization method, take 10g of urea in a 50ml crucible, calcinate in a semi-closed state in air at 520°C for 4 hours, 20°C / min, wash with water and ethanol, and dry in vacuum at 60°C to obtain light yellow carbon nitride powder .

[0037] (3) Preparation of cobalt titanate / carbon nitride composite photocatalyst (expressed as CT-U):

[0038]Grind 10-30 mg of cobalt titanate and 10 g of urea for 30 min, place in a 50 ml crucible, and calcin...

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Abstract

The invention discloses a perovskite material / organic polymer compound photocatalyst, preparation and application, and belongs to the field of perovskite material / organic polymer compound photocatalyst. Rolled-piece-shaped carbon nitride is successfully dispersed on the surface of cobalt titanate, through compounding of electrons on a cobalt titanate conduction band and holes in a carbon nitride valence band, holes in a cobalt titanate valence band and electrons on a carbon nitride conduction band are separated, and therefore the photocatalytic performance is greatly improved. The material is applied to the field of water photolysis hydrogen production, and the hydrogen production rate is substantially increased compared with pure carbon nitride.

Description

technical field [0001] The invention belongs to the field of perovskite / organic polymer composite photocatalyst, in particular to the preparation of cobalt titanate (CoTiO 3 ) and carbon nitride (g-C 3 N 4 ) composite photocatalyst, and apply it to hydrogen production by photolysis of water. Background technique [0002] With the excessive use of fossil fuels, the problem of environmental pollution is becoming more and more serious. In order to improve this situation, it is urgent to develop clean energy. Using sunlight to excite photocatalysts to decompose water to produce hydrogen is one of the important ways to develop hydrogen energy. Therefore, the development of new photocatalysts to improve the performance of photocatalysts for hydrogen production has attracted much attention. [0003] In recent years, significant progress has been made in the field of photocatalysis, and hydrogen production by photolysis of water is one of the current research hotspots. The princ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J31/38C01B3/04
CPCY02E60/36
Inventor 陶霞叶荣钦郑言贞
Owner BEIJING UNIV OF CHEM TECH
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