Products of Bamboo Charcoal Supporting Silver

Abstract

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 μm, 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(NH 3 ) 2 ]NO 3 ) solutions, which are formed by adding 28 wt. % aqueous ammonia into AgNO 3 solution at room temperature. After stirring for 1 h, dilute aqueous solutions of hydrazine monohydrate are separately prepared and introduced to the BC-AgNO 3 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.

1 - 5 . (canceled) 
   
   
       6 . 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). 
   
   
       7 . An antibacterial hygiene object as in  claim 6  containing silver-supporting bamboo charcoal (BC/Ag). 
   
   
       8 . An antibacterial hygiene object as claimed in  claim 7  wherein said object is a sterilizing pack. 
   
   
       9 . An antibacterial hygiene object as claimed in  claim 7  wherein said object is a bandage. 
   
   
       10 . An antibacterial hygiene object as claimed in  claim 7  wherein said object is an ointment. 
   
   
       11 . An antibacterial hygiene object as claimed in  claim 7  wherein said object is a tablet for purifying and sterilizing water. 
   
   
       12 . A silver-supporting bamboo charcoal (BC/Ag) as claimed in  claim 6 , wherein the silver is in a weight ratio of 26% (BC/Ag-1), further comprising carbon in a weight ratio of 63.39% and oxygen in a weight ratio of 6.92%. 
   
   
       13 . A silver-supporting bamboo charcoal (BC/Ag) as claimed in  claim 6 , wherein the silver is in a weight ratio of 29% (BC/Ag-2), further comprising carbon in a weight ratio of 61.30% and oxygen in a weight ratio of 7.17%. 
   
   
       14 . A silver-supporting bamboo charcoal (BC/Ag) as claimed in  claim 6 , wherein the silver is in a weight ratio of 34% (BC/Ag-3), further comprising carbon in a weight ratio of 56.43% and oxygen in a weight ratio of 7.30%. 
   
   
       15 . A silver-supporting bamboo charcoal (BC/Ag) as claimed in  claim 6 , wherein the silver is in a weight ratio of 48% (BC/Ag-4), further comprising carbon in a weight ratio of 45.43% and oxygen in a weight ratio of 6.62%. 
   
   
       16 . A silver-supporting bamboo charcoal (BC/Ag) as claimed in  claim 6 , wherein the silver in weight ratio of 57% (BC/Ag-5), further comprising carbon in a weight ratio of 33.59% and oxygen in a weight ratio of 5.75%. 
   
   
       17 . A silver-supporting bamboo charcoal (BC/Ag) as claimed in  claim 6 , wherein the silver in weight ratio of 75% (BC/Ag-6), further comprising carbon in a weight ratio of 20.53% and oxygen in a weight ratio of 0%.