Using metatitanic acid,silver nitrate and sodium chloride as raw materials,AgCl particles were synthesized and loaded on the surface of H2TiO3 powder under the condition of 60℃ water bath by simple chemical precipitation method to obtain AgCl-H2TiO3 antibacterial agent.It was found that AgCl-H2TiO3 containing 1.5% silver had excellent antibacterial performance,with 100% bactericidal rate against Escherichia coli and the concentration of Ag+ dissolved less than 0.05mg/L,ensuring high antibacterial performance and meeting the national sanitary standards for drinking water.It was found that the adsorption capacity of metatiotitanic acid for silver ions was about 40.2mg/g,and there was a dynamic equilibrium of adsorption and desorption for silver ions,which might be the reason to ensure that the dissolution of silver ions did not exceed the standard in the antibacterial process of AgCl-H2TiO3.This study could provide safe and effective antibacterial materials for the filter element of household water purifier.
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基金资助
国家自然科学基金(22075012和21506010)
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