Preparation And Application Of The ACF/AG/TiO₂Fibers Compound Catalytic Antiseptic

Nano-titanium dioxide with the superiority of non-toxic, high catalytic activity, strongoxidizability and chemical stability, stands out in many semiconductor photocatalysts andmoreover is the core status in the research of photocatalysis. As one kind of photocatalyst,TiO₂（nanomaterials） has a vast range of prospects for waste water treatment, gas purificationand hydrogen preparation, thus a great deal of attention has aroused. But the TiO₂nanoparticl-es suspension, which is widely studied now, has many disadvantages: it is easily to flocculateand deactivate and it is difficult to be recovered, the efficiency of using photoenergy is low,therefore the practical application of this photocatalytic technique is restricted easily. TheACF/Ag/TiO₂nanofibers were prepared using Hydrothermal method combine with sol-gelmethod, and the photocatalytic property and the antibacterial activity of the material wasinvestigated. （1）The TiO₂nanofibers were prepared using hydrothermal method and template method.The optimum technological condition of TiO₂fibers prepared by hydrothermal method was asfollows: concentration of alkali liquor10mol/L, reaction time48h, reaction temperature170℃, the coefficient ofmaterial was0.6, firing temperature600℃,prepared TiO₂fiberswith diameter30-100nm. Taking methylene orange degradation as a model reaction, thephotocatal-ytic property of the material was investigated. The results indicated that thenanofibers were synthesized. The photocatalysis efficiency of TiO₂nanofibers prepared byhydrothermal meth-od were best. And the photocatalysis efficiency on the methylene orangewithin120min was up to91％under the optimum doping proportion. The recovery percentof catalyzer reused3times were81％.（2）The Ag/TiO₂nanofibers were prepared using Hydrothermal method combine withsol-gel method. Taking methylene orange degradation as a model reaction, the photocatalyticproperty of the material was investigated. The results indicated that the nanofibers weresynthesized. As the Ag doping proportion was0.5％, the photocatalysis efficiency was at themaximum. And the photocatalysis efficiency on the methylene orange within60min was upto95％under the optimum doping proportion. The recovery percent of catalyzer reused3 times were87％.The Ag/TiO₂nanofibers containing as low as1％of silver exhibited strongantibacterial activity.（3） The GAC/TiO₂nanofibers and ACF/TiO₂nanofibers were prepared using Hydrother-mal method combine with sol-gel method. Taking methylene orange degradation as a modelreaction, the photocatalytic property of the material was investigated. The results indicatedthat the nanofibers were synthesized. The photocatalysis efficiency of ACF/TiO₂nanofiberswere better than GAC/TiO₂nanofibers. As the TiO₂doping proportion was25％, the photocat-alysis efficiency was at the maximum. And the photocatalysis efficiency on the methyleneorange within120min was up to94％under the optimum doping proportion..The recoverypercent of catalyzer reused3times were90％.The ACF/TiO₂nanofibers containing as low as50％of silver exhibited strong antibacterial activity.（4） The ACF/Ag/TiO₂nanofibers were prepared using Hydrothermal method combinewith sol-gel method. Taking methylene orange degradation as a model reaction, the photocat-alytic property of the material was investigated. The results indicated that the nanofiberswere synthesized. As the Ag doping proportion was0.5％, the photocatalysis efficiency wasat the maximum. And the photocatalysis efficiency on the methylene orange within30minwas up to97％under the optimum doping proportion..The recovery percent of catalyzer reused3times were90％.The ACF/Ag/TiO₂nanofibers containing as low as0.5％of silverexhibited strong antibacterial activity.