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Large specific surface area graphitic carbon nitride photocatalyst and its application in photocatalytic degradation of tcp reaction and photocatalytic hydrogen production reaction

A large specific surface area, phase carbon nitride light technology, applied in the direction of physical/chemical process catalysts, hydrogen production, chemical instruments and methods, etc., can solve problems such as unsatisfactory photocatalytic performance, small specific surface area, complex preparation, etc. , to achieve superior catalytic activity and stability, large specific surface area, and high catalytic activity

Inactive Publication Date: 2017-06-20
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method consumes a lot of energy, takes a long time, and the specific surface area of ​​the product g-C3N4 is small, so the photocatalytic performance is often not very ideal
If template agent (SiO 2 Microspheres, etc.) can increase the specific surface area and thus improve the photocatalytic performance [Chem. Many, the preparation is relatively complicated

Method used

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  • Large specific surface area graphitic carbon nitride photocatalyst and its application in photocatalytic degradation of tcp reaction and photocatalytic hydrogen production reaction
  • Large specific surface area graphitic carbon nitride photocatalyst and its application in photocatalytic degradation of tcp reaction and photocatalytic hydrogen production reaction
  • Large specific surface area graphitic carbon nitride photocatalyst and its application in photocatalytic degradation of tcp reaction and photocatalytic hydrogen production reaction

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Using nitrogen as the discharge gas, the catalyst precursor melamine was discharged by using a dielectric barrier discharge plasma generator. The dielectric barrier discharge plasma generator consists of a quartz tube and two electrodes. A stainless steel wire with a diameter of 2.5 mm is used as a high-voltage electrode, which is installed at the axis of the quartz tube, and one end is connected to an AC power supply. The aluminum foil tightly wound outside the quartz tube is used as the ground electrode and connected to the ground. The structure diagram of the dielectric barrier discharge plasma generator is as follows figure 1 Shown or use the existing commercially available plasma generator. see figure 1As shown, 1 is the high-voltage electrode; 2 is the ground electrode; 3 is the ground; 4 is the quartz tube; 5 is the heat insulation layer; 6 is the catalyst precursor bed; 7 is the gas inlet; 8 is the gas outlet. Put 0.5 g of melamine into a quartz tube, adjust...

Embodiment 2

[0029] In Example 1, the catalyst precursor was changed to dicyandiamide, the input voltage was changed to 80 V, and other steps and conditions remained unchanged, a graphitic carbon nitride photocatalyst with a large specific surface area was obtained.

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Abstract

The invention belongs to the field of a semiconductor photocatalysis technology and specifically relates to a large-specific surface area graphite-phase carbonitride photocatalyst and its application in the photocatalytic degradation reaction of TCP and the photocatalysis reaction for hydrogen production. By a dielectric barrier discharge plasma generator, N2 is used as a discharge gas to discharge catalyst precursors such as melamine, dicyandiamide, urea and the like so as to carry out polycondensation on the precursors. The photocatalyst provided by the invention has advantages of simple operation, short consumed time, low energy consumption, high product catalyst activity, good stability and the like. As the catalyst prepared by the method has larger specific surface area, stronger visible light absorption capacity and higher electron-hole separating efficiency, the catalyst has strong catalytic degradation ability of organic pollutants and photocatalytic decomposition ability of water for hydrogen production under visible light illumination. The catalyst provided by the invention is used in the photocatalytic degradation process of TCP and the photocatalytic decomposition process of water for hydrogen production.

Description

technical field [0001] The invention belongs to the technical field of semiconductor photocatalysis, and in particular relates to a graphite-phase carbon nitride photocatalyst with a large specific surface area and its application in photocatalytic degradation of TCP reaction and photocatalytic hydrogen production reaction. Background technique [0002] Since the discovery of n-type TiO by Fujishima and Honda et al. 2 Since the phenomenon of hydrogen production by photo-induced splitting of water on semiconductor electrodes, heterogeneous photocatalytic technology has attracted the attention of many scholars in the fields of physics, chemistry, environmental protection, and materials. However, as a new environmentally friendly process technology, there are still two key scientific problems that have not been properly resolved: (1) Most semiconductor catalysts have a wide energy band and can only be excited by ultraviolet light, while sunlight reaching the ground Ultraviolet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24A62D3/17C01B3/04A62D101/28
CPCY02E60/36
Inventor 胡绍争李法云范志平陆光张磊
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY