Photocatalytic film and method for preparing photocatalytic film by vapor deposition method

Abstract

The invention provides a photocatalytic film and a method for preparing the photocatalytic film by a vapor deposition method. An existing inorganic film with a porous structure is used as a base filmmaterial, and a precursor containing carbon and nitrogen elements is tiled under the base film material, then calcination is performed under the protection of an inert gas, and the photocatalytic filmis prepared in one step by the vapor deposition of the precursor thermal polymerization. The photocatalytic film has high photocatalytic activity, is convenient for recycling and reuse, and can be applied to the degradation and treatment of soluble organic pollutants in a static or dynamic wastewater with high degradation efficiency. The preparation method of the photocatalytic film is simple inoperation, the precursor and the base material are easy to obtain, the area of the produced photocatalytic film is controllable, and the photocatalytic film with a relatively large area can be prepared. The photocatalytic film and the preparation method of the photocatalytic film are suitable for the actual continuous sewage treatment, and are convenient for popularization and application.

Description

technical field [0001] The invention relates to a photocatalytic film and a preparation method thereof, in particular to a photocatalytic film in which a photocatalyst graphite phase carbon nitride is vapor-phase-deposited on an existing inorganic porous film, and the photocatalytic film can be applied to the treatment of toxic organic matter. Background technique [0002] With the development of society, the destruction of nature by human beings is also increasing, and various problems have arisen as the times require, among which water pollution has attracted much attention. Every year, a large number of refractory toxic organic pollutants enter the natural water system along with industrial and domestic sewage. There are several problems in dealing with these toxic organic pollutants: low concentration is difficult to enrich, difficult to separate from the water system, and difficult to degrade under natural conditions. [0003] Photocatalysis technology, especially vis...

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Problems solved by technology

To deal with these toxic organic pollutants, there are several problems: low concentration is difficult to enrich, difficult to separate from the water system, and difficult to degrade under natural conditions

[0006] Although graphitic carbon nitride has excellent thermal stability, chemical stability and visible light photocatalytic activity, due to the characteristics of its polymer, in photocatalytic applications, there are small specific surface area, narrow visible light response range, and photogenerated charge carriers. Low separation efficiency and other problems, these problems directly affect its photocatalytic activity, and restrict the application of graphitic carbon nitride in the field of photocatalysis

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