Preparation of Sols by Carbon-arc

[摘要] On sparking carbon-arc in water we found that a inflammable gas was generated. The object of this experiment is to prepare sols of metals by applying the gas mentioned to a solution of metallic salts. As the result of this experiment we found that : 1) By this method we can prepare easily some kinds of Ag-sol from AgNO3 solution in about 30 sec. by adjusting the temperature, the quantity of stabilizer and the concentration of metallic salt. 2) The appropriate concentration of AgNO3 is about 0.01% by volume, that of the stabilizer, 0.9104 N-NaOH is 0.03-2 cc/100 cc of 0.01% AgNO3 solution. And the lower the temperature, the more concentrated the Ag-sol. But to check the possibility of applying this method to metals other than Au and Ag, measurement of the particle size and properties of a sol prepared by this method, should be studied. Especially, we must study what kinds of gases are generated by sparking the carbon-arc in water.

[学科分类] 化学（综合）