Large-specific surface area graphite-phase carbonitride photocatalyst and application thereof in photocatalytic degradation reaction of TCP and photocatalysis reaction for hydrogen production

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

CN104874414AInactive Publication Date: 2015-09-02LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-09-02
Estimated Expiration
Not applicable · inactive patent

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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.
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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...

Examples

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 the quartz tube, adj...

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.