具有介孔结构的锐钛矿型C,Co-MTiO2抗菌性能研究

为了开发不需要人造光源激发,只需要微弱室内光线且改性离子不易泄漏的新型无机抗菌材料,以钛酸异丙酯为钛源,表面活性剂十二胺为模板剂,通过水热合成和超声波联用技术,合成了非金属元素C和金属元素Co共掺杂的具有介孔结构的锐钛矿型二氧化钛(C,Co-MTiO2).用N2等温吸附-解吸附、X-射线衍射(XRD)、高分辨透射电镜(HRTEM)、紫外可见吸收光谱(UV-Vis)和X-射线光电子能谱(XPS)对材料进行了表征,结果表明,该材料为热稳定性好,比表面积高,具有较大介孔孔径的锐钛矿型TiO2.在无人造光源激发的室内环境中,进行了材料的抗菌性能以及细菌吸附研究,结果表明这种材料在该环境中对大肠杆菌(E.colli)有很好的抑制作用和吸附作用,比Co-MTiO2的抑菌活性提高了20%,具有很好的应用前景.

A study on antibacterial property of the C,Co doped mesoporous TiO2 with anatase crystalline structure

In order to develop more convenient antibacterial material which can be employed to work efficiently in weak indoor light instead of any artificial light irradiation,C,Co doped mesoporous TiO2(C,Co-MTiO2) with anatase crystalline structural wall has been prepared by direct incorporation pathway by applying 1-dodecylamine as structure-directing agent and titanium tetraisopropoxide as titania source.The structures of the material are characterized by nitrogen adsorption/desorption,X-ray powder diffraction (XRD), high resolution transmission electron microscopy (HRTEM),UV-Vis diffuse reflectance spectra (UV-Vis) and X-ray photoelectron spectroscopic (XPS).The characterization results indicate that the mesoporous titania with anatase crystalline structure exhibites highly thermal stability,high specific surface area and large pore size.In addition, their antibacterial activity and bacterial solution absorbing ability without artificial light irradiation has been studied.The antibacterial test results show that not only the materials' antibacterial activity is affirmative in weak indoor light,without any artificial light irradiation,but it shows excellent absorbing ability as well.The antibacterial activity increase by 20% compared with that of Co-MTiO₂.
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