| In this article, we mainly studied the development, 1~brication method and anti-bacterial popperties of inorganic anti-bacterial agents doped with Ag~. The preparation method, photochemical catalysis and anti-bacterial of Ti02 were also discussed.In the experiments, the stable Ti02-gel was prepared by Sol-Gel method with Ti(0C4H9)4. Different kinds of anti-bacterial powders were made by adjusting the content of Ag~ and complexing agent as well as the heat treatment. With different kinds of tests and measurements such as XRD, XPS and BET, the cooperation effects of Ag~ and Ti02 were analyzed. In addition, the powder's anti-bacterial and toxicological properties were also studied along with it's application used in ceramics, porcelain enamel and PE.Still further, the research work was described in detail as the following aspects:l)The preparation of Ti02 solution doped with Ag~The main components of the prepared solution contained ot TiC)2, Ti(OC4H9)4, which served as precursor to prepare homogeneous and transparent solution, and Ag~, which was introduced from AgNO3 and stabilized by citric acidor Na2S2O3. With different ratio of water, alcohol and complexing agent, different kinds of TiC)2- Ag' solution were got.2)The preparation of TiC)2 powder doped with Ag~TiC)2 powder doped with Age, namely the anti-bacterial material, was prepared by treating the Ti02- Ag~ gel at certain temperature. Thus, by cbanging the ratio of Ag~ to Ti(0C4H9)4 and the complexing agent can a series of samples were got. In this process, some factors, such as the ratio of Ag~ to Ti(OC4H9)4, the complexing agent and heat treatment system, played important roles in the powder's anti-bacterial property.3)The anti-bacterial property of powderTo study the anti-bacterial effect of different samples such as the different contentIIIand prepare route powder, the MIC were tested a?er the powder was sintered at 1200 "C or dipped in the water for more than 100 hours. The results showed that the MIC was controlled by three factors(the content of Ag~, the proportion of surface and the status of crystal) at normal temperature with which matched M=AMoexp(-kC~3. It also showed that when the Ag~ was on the powder's surface, the anti-bacterial capacity of power was controlled by the action of cell death.4)The toxicological testThe toxicological properties of the powders, which was prepared in different route, was tested. The medium lethal dose (LD50) of rat is more than 5000mg/kg, which showed that the powder is toxicological harmless. The toxicological test confirmed that the powder did not irritant to the skin and eyes of rabbit.5)The structure and properties of this anti-bacterial powderThe powder' properti properties, stdi as high t~i~aure resimarinate stability, were tested. The powder's structure was ss ~ r uctur e v~ s an a 1~z e d by ~D, 'EM results showed that the anti-bacterial activation of Ti02 could be improved by the introducing of Ag~ and the anti-bacterial properties of powder was conjuct effect of TiC)2 and Age.6)The application in ceramics, porcelain enamel and PEAnti-bacterial ceramics, porcelain enamel and PE was prepared by special anti-bacterial powder and arts and crafts. The anti-bacterial efficiency of ceramics could reach over 95% when the addition of the powder was l.Owt% and the sintering was in deoxidize enviroment. The porcelain enamel sample had the same anti-bacterial properties as the ceramics' . Another powder could be used in making anti-bacterial PE. The best content was 0.75wt%. The strength and softing temperature of anti-bacterial PE was increasing. The term of validity of milk in the soft package with anti-bacterial PE went up to 10 days at 4 "C.
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