| 摘要 |
PURPOSE: A sol comprising silver bonded to nano-sized titanium dioxide is provided which obtains antibacterial capability without ultraviolet rays and performs photoreaction even in the visible light region, and in which a separate preparation process for preparing transition metals or inorganic antibacterial agent is not necessary, and a preparation method of the sol is provided. CONSTITUTION: The preparation method of sol comprising silver bonded to nano-sized titanium dioxide is characterized in that the sol is prepared using the mixture by sol-gel method, hydrothermal synthesis method or microwave-hydrothermal synthesis method after preparing a mixture comprising 0.1 to 30 wt.% of at least one or more of compounds selected from the group consisting of precursors of titanium dioxide including Ti-alkoxide, Ti-chloride and sulfide, 0.1 to 10 wt.% of hydrolysis inhibitor, 0.1 to 15 wt.% of antioxidant, 0.01 to 10 wt.% of one or more of compounds selected from the group consisting of precursors of silver including silver nitride and sulfide, 1 to 20 wt.% of inorganic binder, 0.1 to 10 wt.% of dispersing agent, and 50 to 99 wt.% of solvent of water or organic solvent, wherein the antioxidant is one or more compounds selected from the group consisting of tripolyphosphate, sodium hexametaphosphate, citric acid, calcium citrate, ferric citrate, ferric ammonium citrate, sodium citrate, EDTA acid, EDTA-2Na, EDTA-4Na and sodium gluconate, wherein the dispersing agent is one or more compounds selected from the group consisting of trisodium phosphate and pyrophosphate, and wherein sodium nitrite is additionally added to the sol. |
