Binary nano composite photo-catalyst preparation method

Abstract

The invention relates to a method used for preparing a binary-nano composite photo-catalyst which takes titanium dioxide as the main body, and the prepared catalyst is applied to the organic wastewater treatment. The preparation method is characterized in that the supercritical fluid drying technology or the common chemical drying technology is combined with four preparation methods of the coprecipitation method, the successive precipitation method, the surface coating method and the mechanical mixing method to prepare the nano composite photo-catalyst which takes the titanium dioxide as the main body, thereby enlarging the range of the spectral response, enabling the absorption wavelength of the catalyst to be shifted toward the visual light wavelength, and improving the quantum effect.

Description

technical field

[0001] The invention relates to four different preparation methods for preparing binary nanometer composite photocatalysts with titanium dioxide as the main body. The focus is to prepare a binary nanocomposite photocatalyst with titanium dioxide as the main body by using four different preparation methods: supercritical fluid drying technology or common chemical drying technology combined with co-precipitation method, sequential precipitation method, surface coating method or mechanical mixing method. . The catalysts prepared by the four methods respectively use ultraviolet light and visible light as light sources, which can effectively degrade organic pollutants, not only improve the photocatalytic activity, but also reduce the recombination degree of photogenerated electrons and holes, and realize the TiO 2 The transfer of light absorption to visible light is an ideal catalyst for environmental pollution control. technical background

[0002] In recent ye...