| 摘要 |
A silver-supporting bamboo charcoal (BC/Ag) comprising silver in different weight ratio of 26% (BC/Ag-1), 29% (BC/Ag-2), 34% (BC/Ag-3), 48% (BC/Ag-4), 57% (BC/Ag-5), or 75% (BC/Ag-6). The BC powders (particle size<10 mum, Taiwan Paiho) are activated with surfactant sodium alginate under stirred for 1 h. The as-prepared BC powders (2 g) are immersed into 100 mL of biamminesilver nitrate ([Ag(NH3)2]NO3) solutions, which are formed by adding 28 wt. % aqueous ammonia into AgNO3 solution at room temperature. After stirring for 1 h, dilute aqueous solutions of hydrazine monohydrate are separately prepared and introduced to the BC-AgNO3 solutions in appropriate quantities (molar ratio 1:1 with respect to silver nitrate) by a syringe. Stirring is continued under inert atmosphere at room temperature for another 4 h. The BC/Ag particles are separated and washed with deionized water and ethanol, then dried in vacuum at 60° C. for overnight.
|
