Ionothermal Synthesis of Metal Oxide-Based Nanocatalysts and Their Application towards the Oxidative Desulfurization of Dibenzothiophene

Figure 7

HRTEM images of Fe₃O₄, Mn₃O₄, and Co₃O₄ metal oxide NPs obtained from the calcination of [EMIM-Cl][FeCl₂], [EMIM-Cl][MnCl₂], and [EMIM-Cl][CoCl₂], respectively, at 600°C, whereas, α-Fe₂O₃, Mn₂O₃, and α-Co(OH)₂ were obtained from chemical treatment with NaBH₄.