Plasma-Reduction of Inorganic Substances in the Liquid Phase

Abstract

It was found that inorganic substances such as I₂, K₂Cr₂O₇, and K₃[Fe(CN)₆] were reduced efficiently and quantitatively in DMF when they were exposed to a radio-frequency cold plasma. The reduction was considered to occur by the direct addition of high-energy electrons in the plasma to the inorganic substances to give I₂, Cr⁰, and K₄[Fe(CN)₆], respectively.
The reduction occurred in DMF, but not occurred in water, mthanol and in crystalline state. From the experimental results at various I₂ concentrations and various plasma powers, an apparent rate of reduction of I₂ could be expressed as:
R=K[I₂]-^0.3 [PLASMA PO WER]⁰ It was also found that“postreduction” took place whe n these substances were left standing in vacuo after the plasma exposure.