Preparation method of TiO2 photocatalyst for loading on ceramic surface

Abstract

The invention relates to the process for preparing TiO2 photo-catalyst carrier on ceramic surface, wherein the compact ceramic carrier material is supported with TiO2 colloidal sol through sol-gal process, the TiO2 colloidal sol is prepared through dissolving butyl titanate or propyl titanate into acids, alcohols and water, washing and drying the finished ceramic carrier into TiO2 colloidal sol for 2-40 minutes, seasoning, sintering the carrying agent with carried colloidal sol in the furnace, elevating the temperature from room temperature to 80-250 deg. C, heat preserving for 10-80 minutes, elevating temperature again to 250-400 deg. C, heat preserving for 20-80 minutes, elevating the temperature to 450-550 deg. C, heat preserving for 40-90 minutes, furnace cooling to room temperature. A stabilized catalytic activity can be achieved by the invention.

Description

1. Technical field

[0001] The present invention relates to TiO 2 Preparation method of photocatalyst supported on surface. 2. Background technology

[0002] The photocatalytic oxidation method is based on the fact that the photocatalyst produces active oxygen (such as hydroxyl radicals, etc.) with strong oxidation ability due to the action of light in the water system, which can oxidize various types of organic compounds and eventually degrade into water, CO 2 and inorganic substances. The effect on organic compounds (such as dyes, pesticides, etc.) containing heterocyclic or unsaturated bonds in molecules is better, and it is a potential method for sewage treatment and drinking water purification. Semiconductor TiO 2 It is the most typical photocatalyst, which has the advantages of stable chemical properties, non-toxicity, low price, mild reaction conditions, and no secondary pollution. But the powdered TiO 2 It is difficult to recycle. In addition, only ultraviolet li...

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