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

Abstract

The invention relates to a preparation method of waterborne nano-antibacterial photocatalysis titanium oxide composite sol. The preparation method comprises the following steps: (1) carrying out acidhydrolysis; (2) purifying titaniferous solution; (3) carrying out peroxidation complexing on titanium; and (4) carrying out catalytic decomposition. According to the preparation method provided by theinvention, cheap titanic iron ore is adopted as a raw material, and orthotitanic acid is obtained without carrying out alkali precipitation on titanyl sulfate. The preparation method has the advantages that zinc peroxide is taken as a reactive substance, peroxyl and titanium ions directly form a complex and are dissolved into water, secondary purification dissolution does not need to be carried out, and zinc sulfate formed by Zn ions and sulfate radicals has antibacterial and deodorizing effects, so that steps are simple and convenient; meanwhile, Fe<2+> is introduced as a Fenton catalyst, sothat titanium peroxide is rapidly decomposed and generates titanium oxide, gelatinization of the titanium peroxide is avoided, and the titanium oxide and zinc sulfate form a composite antibacterial product. The prepared composite product is uniform in particle morphology, use of alkaline and discharge of wastewater can be greatly saved, and the preparation method provided by the invention is simple in technology and is applicable to 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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