Supplementary Information files for "The fate of plasma-generated oxygen atoms in aqueous solutions: non-equilibrium atmospheric pressure plasmas as an efficient source of atomic O(aq)"

These are the Supplementary Files for the article "The fate of plasma-generated oxygen atoms in aqueous solutions: non-equilibrium atmospheric pressure plasmas as an efficient source of atomic O(aq)" with abstract:Non-equilibrium radio-frequency driven atmospheric-pressure plasma in He/0.6%O2 gas mixture has been used to study the reaction mechanism of plasma-generated oxygen atoms in aqueous solutions. The effluent from the plasma source operated with standard and 18O-labeled O2 gas was used to treat water in the presence of phenol as a chemical probe. Comparing the mass spectrometry and gas chromatography-mass spectrometry data of the solutions treated with plasma under normal and labeled oxygen provides clear evidence that O(aq) originating from the gas phase enters the liquid and reacts directly with phenol, without any intermediate reactions. Additionally, the atmospheric-pressure plasma source demonstrates great potential to be an effective source of O(aq) atoms without the requirement for any precursors in the liquid phase.

本文件为论文《水溶液中等离子体源生氧原子的归趋：非平衡大气压等离子体作为原子态溶解氧（O(aq)）的高效来源》的补充材料。其配套论文摘要如下：本研究采用He/0.6%O₂混合气中的射频驱动非平衡大气压等离子体，探究等离子体产生的氧原子在水溶液中的反应机制。实验以普通氧气与18O标记氧气作为工作气驱动等离子体源，以苯酚作为化学探针处理水溶液。通过对比两组经等离子体处理的水溶液的质谱（Mass Spectrometry）与气相色谱-质谱联用（Gas Chromatography-Mass Spectrometry）数据，本研究获得明确证据：源自气相的O(aq)可直接进入液相并与苯酚发生反应，无任何中间反应参与。此外，该大气压等离子体源无需液相前驱体即可作为O(aq)原子的高效来源，展现出极佳的应用潜力。