Enhancing catalytic ozonation activity of MCM-41 via one-step incorporating fluorine and iron: The interfacial reaction induced by hydrophobic sites and Lewis acid sites

Highly Dispersed FeAg-MCM41 Catalyst for Medium-Temperature Hydrogen Sulfide Oxidation in Coke Oven Gas

“…The changes in the surface groups were investigated by using Fourier-transform infrared (FTIR) spectroscopy (Figure S19). The peak located at ∼3400 cm –1 corresponds to the stretching vibration of surface O–H groups, while the peak observed at ∼1639 cm –1 is characteristic of the bending vibration of H–OH . The peaks located at ∼1040 and 796 cm –1 can be assigned to the asymmetrical stretching vibration of Si–O–Si and the symmetrical stretching vibration of Si–O, respectively .…”

“…The peak located at ∼3400 cm −1 corresponds to the stretching vibration of surface O−H groups, while the peak observed at ∼1639 cm −1 is characteristic of the bending vibration of H− OH. 32 The peaks located at ∼1040 and 796 cm −1 can be assigned to the asymmetrical stretching vibration of Si−O−Si and the symmetrical stretching vibration of Si−O, respectively. 29 This result confirms that these catalysts retain the dominant Si−O−Si skeleton structure of MCM-41.…”

Mechanism of catalytic ozonation in different surface acid sites of oxide aqueous suspensions

“…Another mechanism, according to which the catalytic ozonation occurs via surface reactions involving the adsorption of both the pollutant and O 3 , was also proposed. 23,24 It is also unclear whether the adsorption of organics on the catalyst surface plays a crucial role in the catalytic process. 5 Furthermore, the process of conversion of O 3 to ROS on the oxide surface and the specific ROS involved are still unknown.…”