Sol-gel in situ and self assembling process for synthesizing compound photocatalystic material

Abstract

The present invention discloses sol-gel in-situ and self assembling process of synthesizing composite photocatalytic material, and belongs to the field of nano functional material. The process includes the following steps: dissolving metal chlorate in proper amount of solvent; adding mixed phthalic nitrile via stirring; adding proper amount of butyl titanate; adding proper amount of hydrochloric acid as hydrolysis inhibitor and pH regulator; stirring at room temperature to form dry gel; and drying and heat treatment to obtain the nano composite photocatalyst. During the preparation, the metal phthalocyianine compound and TiO2 are in-situ and self-assembling formed simultaneously, and the obtain organic matter and inorganic matter have clear interface, strong binding performance and high stability and are favorable to the transfer of photoelectron and absorbed energy in between. The compound photocatalyst has high photocatalytic degradation efficiency.

Description

Technical field: [0001] The invention relates to a nanometer metal phthalocyanine complex / TiO 2 The sol-gel in-situ and self-assembly synthesis technology preparation method of composite photocatalytic materials, to be precise, it belongs to a preparation method of nano functional materials. Background technique: [0002] Among many environmental water pollution control technologies, photocatalytic oxidation technology has become an environmental water pollution control technology with broad application prospects due to its unique properties such as deep reaction at room temperature and simple catalytic conditions. At present, the main nano-semiconductor TiO 2 (Anatase type) As a photocatalyst, due to the use of nanotechnology to make TiO 3 Small size, large specific surface area and a large number of dangling bonds on the surface, and full contact with water pollutants, not only improve the catalytic rate, reduce the reaction temperature, and the method is simple and easy...

AI Technical Summary

Problems solved by technology

[0011] (2) Since the vast majority are insoluble in most solvents except concentrated sulfuric acid, this method is difficult to be applied to other metal phthalocyanine complexes, and the methanol solvent used in this method is also difficult to completely dissolve iron phthalocyanine;

[0012] (3) Most of the metal phthalocyanine complexes are easy to cause dimerization or multimerization in solvents other than concentrated sulfuric acid, which not only affects the composite concentration of the metal phthalocyanine complexes, and the uniform distribution in the inorganic matrix, but also will reduce the photocatalytic efficiency;

[0013] (4) In the composite material formed by this method, since the metal phthalocyanine complex is easy to form an organic phase boundary, it is easy to cause the phase separation of the inorganic phase and the organic phase during the post-treatment sintering process, as well as the combination and thermodynamic stability. performance decline, and will affect the photocatalytic efficiency;

[0014] (5) The photocatalyst synthesized by this method is only suitable for ultraviolet light photocatalysis, and cannot realize visible light photocatalysis, which limits the wide application of this kind of catalyst

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