Chen Yongduo, Li Yang, Zhu Anna, Huang Yifan, Liu Zhen, Yan Keping
Key Laboratory of Biomass Chemical Engineering of the Ministry of Education, Industrial Ecology and Environment Research Institute, Zhejiang University, Hangzhou, 310000, People's Republic of China.
Environ Sci Pollut Res Int. 2014;21(16):9948-58. doi: 10.1007/s11356-014-2982-9. Epub 2014 May 21.
The degradation of aqueous Rhodamine B (RhB) was examined using a dual-channel spark switch module designed to regulate the steepness of pulsed high voltage with microsecond rise time. Depending on the energy per pulse, a spark along the water surface (SPWS) or streamer along the water surface (STWS) was formed. STWS was found to have a better degradation effect and energy efficiency toward RhB than SPWS at the same power; however, addition of H₂O₂ amounts resulted in increased degradation, the effect being more pronounced using SPWS. The initial concentration of RhB also appeared to influence the rate constant of the degradation reaction. Furthermore, TiO₂ films doped with Fe, Mn, and Ce were found to enhance the degradation performance of plasma. A possible reaction mechanism of plasma formation along the water surface was concluded by determination of the main inorganic products in the liquid and gas phases.
使用一个双通道火花开关模块对水溶液中的罗丹明B（RhB）降解进行了研究，该模块旨在调节具有微秒级上升时间的脉冲高压的陡度。根据每个脉冲的能量，在水面形成了沿水面的火花（SPWS）或沿水面的流光（STWS）。发现在相同功率下，STWS对RhB的降解效果和能量效率比SPWS更好；然而，添加过氧化氢量会导致降解增加，使用SPWS时这种效果更明显。RhB的初始浓度似乎也会影响降解反应的速率常数。此外，发现掺杂有铁、锰和铈的二氧化钛薄膜可提高等离子体的降解性能。通过测定液相和气相中的主要无机产物，得出了沿水面形成等离子体的可能反应机理。
