Method for preparing carbon nitride material with nano sheet/nano tube composite structure

A nanotube composite and nanosheet technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of limited photocatalytic performance improvement and single morphology, and achieve improved photocatalytic performance , simple process, and the effect of reducing mass transfer resistance
CN109647484AInactive Publication Date: 2019-04-19XIAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XIAN UNIV OF TECH
Publication Date
2019-04-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for preparing a carbon nitride material with a nano-sheet / nano-tube composite structure, which comprises the following steps of: preparing a modified precursor by taking a carbon-nitrogen precursor, a halogen potassium compound and water as raw materials and carrying out hydrothermal treatment on a conventional carbon-nitrogen precursor by adopting the halogen potassium compound; then calcining the modified precursor at high temperature to obtain the carbon nitride material with the nano-sheet / nano-tube composite structure. Compared with the traditional bulk phase g-C3N4, on one hand, the carbon nitride material prepared by the method has the obvious nano-sheet / nano-tube composite structure, so that the specific surface area of the material is effectively improved, and the photocatalytic activity of the carbon nitride material is improved; on the other hand, a hollow tubular structure is beneficial to promoting multiple scattering of visible light inside, effectively promoting the separation and conduction of photon-generated carriers, improving the utilization rate of the material to light, and further improving the photocatalytic performance. Compared with unmodified bulk phase g-C3N4, the degradation rate of the material of the invention is improved by 30 times.
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Description

technical field

[0001] The invention belongs to the technical field of photocatalytic material preparation, and in particular relates to a preparation method of a carbon nitride material with a nanosheet / nanotube composite structure. Background technique

[0002] Graphite carbon nitride (g-C 3 N 4 ) as a visible light-responsive non-metallic polymer semiconductor material has broad application prospects in the fields of photolysis of water to produce hydrogen, photoreduction of carbon dioxide, and photodegradation of organic pollutants. However, unmodified bulk g-C 3 N 4 Although it has a certain photocatalytic performance, it has the disadvantages of small specific surface area, fast recombination rate of photogenerated carriers, and low photocatalytic activity under visible light, which seriously restricts its application in the field of photocatalysis.

[0003] Existing literature shows that: conventional bulk g-C 3 N 4 The modification methods of photocatalytic mat...

Claims

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