Abstract

TiO₂/Au had been prepared readily from tetrabutyl titanate and chloroauric acid by in situ solvothermal method. SEM, XRD, UV-vis, FTIR, etc were used for characterizing the morphology, crystal structure, and optical performance of TiO₂ and TiO₂/Au. The photocatalytic degradation performance on methyl orange and antibacterial properties against Escherichia coli of TiO₂ and TiO₂/Au were studied. The results showed that the TiO₂/Au both possessed superior photocatalytic properties under simulated or nature sunlight. The photocatalytic degradation rate of TiO₂/Au on methyl orange was up to 91.57% that was obviously better than TiO₂ (65.13%). Moreover, TiO₂ and TiO₂/Au had significant antibacterial properties against Escherichia coli, and the inhibition rate was up to 99.89%. The activity of TiO₂ and TiO₂/Au was tested by ESR and H₂-TPR for analyzing the mechanism of the improvement of the photocatalytic activity and antibacterial properties.

中文翻译：

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TiO2/Au复合材料光催化降解有机污染物及其抗菌性能研究

摘要

以钛酸四丁酯和氯金酸为原料，采用原位溶剂热法制备了TiO _{2 /Au。采用SEM、XRD、UV-vis、FTIR等手段对TiO 2}和TiO ₂ /Au的形貌、晶体结构和光学性能进行了表征。研究了TiO ₂和TiO ₂ /Au对甲基橙的光催化降解性能和对大肠杆菌的抗菌性能。结果表明，TiO ₂ /Au在模拟阳光或自然阳光下均具有优异的光催化性能。_{TiO 2} /Au对甲基橙的光催化降解率高达91.57%，明显优于TiO ₂ (65.13%)。此外，TiO ₂和TiO ₂ /Au对大肠杆菌具有显着的抗菌性能，抑制率高达99.89%。_{采用ESR和H 2} -TPR测试TiO ₂和TiO ₂ /Au的活性，分析光催化活性和抗菌性能提高的机理。