Takenaka Kosuke, Miyazaki Atsushi, Abe Hiroya, Uchida Giichiro, Setsuhara Yuichi
J Nanosci Nanotechnol. 2015 Mar;15(3):2120-4. doi: 10.1166/jnn.2015.10230.
Investigation of plasma-organic materials interaction in aqueous solution with atmospheric pressure plasmas have been carried out. Degradation of methylene blue (MB) in aqueous solution via atmospheric pressure He plasma exposure through gas/liquid interface have been investigated. The optical emission spectrum shows considerable emissions of He lines and the emission of O, OH and N radicals attributed to dissociation of water (H2O) and air has been confirmed. Structure variation of MB in solution treated with the atmospheric-pressure He plasma has been measured by Fourier transform infrared spectroscopy (FT-IR). The results obtained from FT-IR analysis show degradation of MB in solution treated with the atmospheric-pressure He plasma. The pH effect of MB degradation was investigated using controlled pH solutions by an ultraviolet-visible (UV-Vis) spectroscopy and FT-IR. The results show no effect of MB degradation on pH. The results exhibit that the atmospheric pressure plasmas exposure has made it possible to degrade organic materials in solution due to irradiated radicals from plasma through plasma/liquid interface.
已开展了大气压等离子体与水溶液中血浆有机材料相互作用的研究。通过气/液界面暴露于大气压氦等离子体中，研究了水溶液中亚甲基蓝（MB）的降解情况。光学发射光谱显示有大量的氦线发射，并且已证实归因于水（H2O）和空气解离的O、OH和N自由基的发射。通过傅里叶变换红外光谱（FT-IR）测量了用大气压氦等离子体处理的溶液中MB的结构变化。FT-IR分析得到的结果表明，用大气压氦等离子体处理的溶液中MB发生了降解。使用紫外可见（UV-Vis）光谱和FT-IR对控制pH溶液进行研究，考察了MB降解的pH效应。结果表明MB降解对pH没有影响。结果表明，由于等离子体通过等离子体/液体界面辐照产生的自由基，大气压等离子体暴露使得降解溶液中的有机材料成为可能。
