Investigation of Enzyme-like Activities of CeO۲ Nanoparticles for H۲O۲ Detection

As prospective alternatives for natural enzymes, catalytically active nanomaterials, known as “nanozymes” have attracted considerable interest over the past decade. In this research, cerium oxide nanoparticles (CeO۲ NPs) were synthesized using precursor Ce(NO۳)۳.۶H۲O by hydrothermal method. The morphology of the nanoparticles was investigated with scanning electron microscopy. The excellent catalytic response of CeO۲ NPs in oxidation of ۳,۳',۵,۵'-tetramethyl benzidine (TMB) in the presence of H۲O۲ was obtained by taking the UV-vis spectra of the reaction solution after adding the nanoparticles. The superior peroxidase catalytic activity of CeO۲ NPs can be related to increase of oxygen defects in the NPs surface through fluctuation in the atomic number between Ce۳+ and Ce۴+ neighbors and interatomic distances.

کلیدواژه ها:

Catalyst ، CeO۲ ، Nanozyme ، Peroxidase activity.