Preparation method for sulfonated cobalt phthalocyanine sensitized titanium dioxide compound photocatalyst

Abstract

The invention relates to a preparation method for sulfonated cobalt phthalocyanine sensitized titanium dioxide compound photocatalyst and belongs to the technical field of inorganic-organic compound catalytic material preparation. Sulfonated cobalt phthalocyanine is purified and activated and then reacts with titanium dioxide nanometer particles for 10-24 hours inside a water solution at normal temperature and normal pressure to form sulfonate type chemical bonding; then through filtering, washing and drying, the compound photocatalyst is obtained, wherein the mass ratio of the compound photocatalyst is 0.5-2.0:100. Through the method, sulfonated cobalt phthalocyanine can be effectively loaded on the titanium dioxide nanometer particles to improve the visible-light response characteristic of the photocatalyst without changing the crystal-form distribution of the titanium dioxide nanometer particles. The compound photocatalyst prepared through the method has remarkably improved visible-light catalytic activity; under the same conditions, through the compound photocatalyst, the degrading efficiency of methylene blue dye in simulation wastewater is 2.4 times that of non-sensitized titanium dioxide nanometer particles. According to the method, no organic solvent is used, normal-temperature and normal-pressure reaction is performed, the cost is low, and energy consumption is low.

Description

Technical field [0001] The invention belongs to the technical field of preparation of inorganic-organic composite materials, and specifically relates to a preparation method of a sulfonated cobalt phthalocyanine sensitized titanium dioxide composite photocatalyst and its application in visible light photocatalysis. Background technique [0002] Environmental pollution has increasingly become one of the major problems facing mankind, and waste organic matter pollutes water resources particularly seriously. With the development of photocatalytic technology, photocatalytic degradation of organic pollutants in water has gradually shown great potential in environmental governance. The advantages of low cost, no secondary pollution, and direct use of sunlight are also attracting attention. [0003] The semiconductor photocatalyst has aroused great research interest due to its high activity, low cost and good stability, and it is a kind of catalytic material with great potential. In the...

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Problems solved by technology

[0005] Phthalocyanine-sensitized TiO has been reported to be prepared by vapor deposition, physical blending, high-temperature calcination, or solution impregnation. 2 Powder or film, but there are disadvantages such as high preparation cost, poor uniformity, and consumption of a large amount of organic solvents

Uniform in situ complexed phthalocyanine-TiO can be prepared by hydrothermal method 2 Hybrid powder, however, this high temperature and high pressure reaction has disadvantages such as high energy consumption and difficulty in mass production

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