Influence of substituent position and pH on organophosphates hydrolysis catalyzed by various nanocrystalline ceria
Year: 2025
Type: article
Abstract: The dephosphorylation of naphthyl phosphate isomers was investigated on five different nanocrystalline ceria samples and at different pH to determine how physicochemical properties and reaction conditions affect catalytic performance. The reaction rate was consistently higher under acidic conditions for all samples, which was likely due to variations in the reaction mechanisms and the specific properties of ceria prepared by different methods. We also studied the adsorption of primary degradation products (naphthol isomers) and observed different adsorption capacities for individual samples, which may influence the overall reaction kinetics. In addition, FTIR analysis confirmed the presence of reaction residues on the ceria surface, which may also affect the reaction rate. The synthesis method influences the physicochemical properties of ceria, such as surface characteristics, stability, and catalytic activity. However, the position of the substituent on the organic backbone also significantly affected the decomposition of the selected organophosphorus compounds . The 2-naphthyl phosphate isomer (with the substituent in position 2) decomposed more rapidly on all samples, due to reduced steric hindrance from the organic backbone.
Language: English
Subfield: Water Science and Technology
Field: Environmental Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,350
OpenAlex ID: W4409185348