Generation of Three-Dimensionally Integrated Micro-Solution Plasma and Its Application to Decomposition of Methylene Blue Molecules in Water

Integrated micro-solution plasma was generated in gas bubbles in porous dielectric materials filled with a gas/liquid mixed medium. Methylene blue aqueous solution (3.8 mg/L, 150 mL) was treated with the integrated micro-solution plasma. The decomposition of methylene blue molecules was confirmed through the reduction in the optical absorption coefficient at 665nm for methylene blue molecules, and through the fact that the absorption coefficient at 665nm did not recover even after stirring in air. The decomposition efficiency of the integrated micro-solution plasma was 15.7-fold higher than that of conventional solution plasma. (C) 2013 The Japan Society of Applied Physics