Cu-TiO2 photocatalyst and preparation method thereof

Abstract

The invention discloses a Cu-TiO2 photocatalyst. The structure of the Cu-TiO2 photocatalyst is formed by the epitaxial growth of element copper on a (101) crystal face of a titanium nano-sheet. The invention also discloses a preparation method of the photocatalyst. The preparation method comprises the steps of mixing 2.5ml to 3.5ml of hydrofluoric acid and 0.6g to 0.8g of copper nitrate with 28ml to 32ml of tetrabutyl titanate to obtain a mixture, stirring the mixture for 12 hours, carrying out the hydrothermal synthesis reaction for 12 hours at the temperature of 175 to 185 DEG C, filtering, washing, drying and grinding a reaction product after the reaction is ended, obtaining the Cu-TiO2 photocatalyst. The Cu-TiO2 photocatalyst has beneficial effects that the element copper grows on the (101) crystal face of the titanium dioxide nano-sheet in an epitaxial manner, so that the separation efficiency of a photon-generated carrier can be effectively improved, and the degradation speed for organic dye such as methyl blue can be greatly increased. The preparation process flow is simplified, and the preparation time and the preparation cost can be greatly saved.

Description

technical field [0001] The invention belongs to the technical field of nanometer photocatalytic materials and relates to a Cu-TiO 2 Photocatalyst, the present invention also relates to a kind of Cu-TiO 2 Preparation method of photocatalyst. Background technique [0002] TiO 2 It has been widely used in the field of photocatalysts, however, its existing chemical methods to synthesize Cu-TiO 2 As a photocatalyst, elemental copper is attached to the titanium dioxide nanoparticle structure, and there is no phase relationship with the titanium dioxide crystal plane. The structure is simple, and the existing products are often prepared in steps, that is: first prepare the titanium dioxide particles, Then depositing the copper particles takes too much time and costs a lot. If there is no mutual epitaxial growth relationship between copper and titanium oxide, the discontinuity of the interface will hinder the electron transport during the charge separation process, which will ea...

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Problems solved by technology

[0002] TiO 2 It has been widely used in the field of photocatalysts, however, its existing chemical methods to synthesize Cu-TiO 2 As a photocatalyst, elemental copper is attached to the titanium dioxide nanoparticle structure, and there is no phase relationship with the titanium dioxide crystal plane. The structure is simple, and the existing products are often prepared in steps, that is: first prepare titanium dioxide particles, Then deposit copper particles, which is too time consuming and expensive

If there is no mutual epitaxial growth relationship between copper and titanium oxide, the discontinuity of the interface will hinder the electron transport during the charge separation process, which will easily cause the recombination of photogenerated carriers on the titanium oxide surface, slow the degradation of pollutants, and the efficiency will be too high. Low

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