日光灯光响应混晶纳米TiO2乳液的制备及抗菌性能

以四氯化钛、氨水、表面活性剂为主要原料,采用常压液相两步水解法制备了晶型比例可控的混晶纳米TiO2粉末及高分散乳液。对样品形貌、组成及结构进行了表征。结果表明,混晶乳液分散性好,粒径约15 nm;在普通日光灯照射下,乳液对一些细菌和真菌有很好的抗菌性能:对革兰氏阳性菌(金黄葡萄球菌和枯草芽孢杆菌)的杀灭率达到100%,对革兰氏阴性菌(大肠杆菌)也有很好的杀灭性能,对黑曲霉、黄曲霉和白色念珠菌等真菌产生清晰的抑菌圈,抑菌直径约20 mm。

Preparation of Mix-crystal TiO2 Nano Emulsion and Its Antibacterial Properties Under Fluorescent Lamp

With TiCl4,ammonia and surfactant as the raw material,the dispersion emulsion of mix-crystal nanometric TiO2 was obtained by 2-step hydrolyzation method under constant pressure.Morphologies,compositions and structures of the samples were characterized.The results show that the dispersity of emulsion is good and the average diameter of particles is about 15 nm.Its bactericidal properties to some bacteria and epiphytes are strong under daylight lamp irradiation.The killing rate to Gram negative bacterium(Staphylo-coccus aureus and Bacillus subtilis) is 100%,in addition,killing activity of it to Gram positive bacterium(Escherichia coli) is very high.It has a clear antibacterial circle of about 20 mm in diameter toward epiphytes such as Aspergillus niger,Aspergillus flavus and Candida albicans etc.