Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan.
J Hazard Mater. 2010 Feb 15;174(1-3):473-6. doi: 10.1016/j.jhazmat.2009.09.076. Epub 2009 Sep 20.
The degradation of methylene blue by radio frequency (RF) plasmas in water under ultraviolet (UV) irradiation was studied experimentally. When the methylene blue solution was exposed to RF plasma, UV irradiation from a mercury vapor lamp enhanced degradation significantly. A lamp without power supply also enhanced degradation since weak UV light was emitted weakly from the lamp due to the excitation of mercury vapor by stray RF power. Such an enhancement is explained by the fact that after hydrogen peroxide is produced via the recombination process of OH radicals around the plasma, OH radicals reproduced from hydrogen peroxide via the photolysis process degrade methylene blue.
实验研究了在紫外线（UV）照射下，水中的亚甲基蓝通过射频（RF）等离子体的降解情况。当亚甲基蓝溶液暴露在射频等离子体中时，来自汞蒸气灯的紫外线照射显著增强了降解。即使没有电源的灯也能增强降解，因为由于射频功率的杂散激发，汞蒸气灯会微弱地发出弱紫外线。这种增强可以通过以下事实来解释：在等离子体周围的 OH 自由基的复合过程中产生过氧化氢后，通过光解过程从过氧化氢中再生的 OH 自由基降解亚甲基蓝。
