Mesoporous titanium dioxide was prepared by the alcohol-thermal method.Silver modified mesoporous titania silver (m-TiO2/Ag) composite material was prepared by photoreduction method.The morphologies and compositions of the composites were characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD).The photocatalytic performances of samples with different Ag content were characterized by degradation test of methylene blue (MB).The antibacterial properties were characterized by growth curves,minimal inhibitory concentrations and inhibition rings.The results showed that the prepared m-TiO2 was an anatase-based mixed crystal with a small amount of brookite and the metal Ag particles were deposited on the surface of m-TiO2.Nano-silver loading significantly improved the visible light photocatalytic performance of m-TiO2.The photocatalytic degradation reaction of methylene blue followed a first-order kinetic model.The antibacterial performance of mesoporous titanium dioxide gradually increased with the increase of silver loading.
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基金资助
国家自然科学基金青年基金(51508239);江苏省自然科学基金青年基金(BK20150245);江苏省研究生科研与实践创新计划项目(SJCX17-0778)
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