Preparation method of aqueous nano-antibacterial photocatalytic titanium oxide composite sol

Abstract

The invention relates to a method for preparing aqueous nano-antibacterial titanium oxide composite sol. The method includes the following steps: (1) acid hydrolysis; (2) titanium liquid purification; (3) titanium peroxidation complexation; (4) catalysis break down. The preparation method according to the present invention uses low-priced ilmenite as raw material, and does not require alkali precipitation of titanyl sulfate to obtain orthotitanic acid. This method uses zinc peroxide as the reaction material to directly dissolve the complex formed by peroxide radicals and titanium ions in water without secondary purification and dissolution. At the same time, the zinc sulfate formed by Zn ions and sulfate radicals has antibacterial and deodorizing effects, and the steps are simple; At the same time, by introducing Fe 2+ As a Fenton catalyst, titanium peroxide can be quickly decomposed into titanium oxide, preventing the gelation of titanium peroxide, and forming a composite antibacterial product with zinc sulfate. The prepared composite product has uniform particle morphology, which can greatly save the use of alkali and the discharge of waste water. The preparation method according to the invention has a simple process and is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the preparation process of inorganic functional nano-sol, in particular to the preparation method of titanium dioxide-metal salt composite water-based nano-composite antibacterial sol. Background technique [0002] Nano-TiO 2 As a functional inorganic material, it has broad application prospects in many fields such as coatings, photoelectric conversion, catalysis, functional ceramics, and antibacterial materials. Among them, nano-titanium dioxide antibacterial technology has received extensive attention. Compared with traditional inorganic antibacterial agents, its broad-spectrum and potent properties have been widely confirmed. However, its effect requires light excitation. Therefore, its application is limited in some occasions where there is no light or discontinuous light. Therefore, the traditional inorganic antibacterial agent is combined with the photocatalytic excitation antibacterial performance of nano-titanium oxide...

AI Technical Summary

Problems solved by technology

Titanium dioxide nano-sol is prepared by controlled hydrolysis of titanium organic compounds. Due to the high price of titanium organic compounds, the cost is greatly increased; at the same time, due to the mixed hydrolysis of alcohol and water, the obtained product is an organic solution, which limits its use on hydrophilic substrates. Apply on

The hydrolysis of titanium inorganic salts requires additional steps such as high-temperature hydrothermal crystallization, which not only requires special equipment and devices, but also increases costs and limits production scale.

[0004] At the same time, traditional methods usually divide the synthesis of nano-titanium oxide, the synthesis of antibacterial agents, and the compounding of the two into several independent synthesis steps. On the one hand, it is impossible to form a stable composite system between nano-titanium oxide and antibacterial agents. ,higher cost

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