Fig. 6: Oxidation performance of interfacial SO4•−.
From: Harnessing air-water interface to generate interfacial ROS for ultrafast environmental remediation
a Schematic illustration of the Co@SCN-PMS-Microbubble system for the purification of VOCs waste gas; b Control experiments of toluene oxidation under different microbubble conditions; c Long-term performance of toluene oxidation via multiple additions of PMS in the Co@SCN-PMS-Microbubble system; d Calculated potential energy diagrams for toluene oxidation to two key reaction intermediates by SO4•− and Gibbs free energy comparison of corresponding reactions in gas phase, interface and liquid phase; e Comparison of the free energy changes of SO4•− and toluene in the gas-to-liquid phase transition. Conditions of b and c: [Co@SCN] = 0.2 g L−1, [PMS] = 2.0 g L−1 for each 120 min reaction, pH = 3.0, [Toluene]inlet = 30 ppmv.
