Study of Degradation Kinetics of Parathion Methyl On Mixed Nanocrystalline Titania-Zirconium and Titania-Cerium Oxides

Modulating Ce3+ Sites in Ce‐Zr Oxide Nanocatalysts through Protamine Biomineralization for Organophosphate Dephosphorylation

“…The degradation rate of OP in natural environments is low, largely relying on a limited number of microorganisms that can gradually biodegrade them to inert substances through enzymatic processes [5] . Heterogenous catalysts using nanoscale metal oxides have shown promise as a means to hydrolyse OPs, with recent examples including the use of TiO 2 , CeO 2 , and MgO [6–8] . Among these oxides, cerium oxide demonstrates a capacity for increasing the rate of organophosphate dephosphorylation (OPD) [6,9,10] .…”

“…[5] Heterogenous catalysts using nanoscale metal oxides have shown promise as a means to hydrolyse OPs, with recent examples including the use of TiO 2 , CeO 2 , and MgO. [6][7][8] Among these oxides, cerium oxide demonstrates a capacity for increasing the rate of organophosphate dephosphorylation (OPD). [6,9,10] Ceria can exist in dual oxidation states as Ce 3 + and Ce 4 + , enabling the ability to accommodate a high density of oxygen vacancies (Vo), which enhances the catalytic activity for OPD due to the cooperative redox property of Ce 3 + and Ce 4 + .…”