A detailed insight into the effects of morphologies of cerium oxide on Fenton‐like reactions for different applications
Meijuan Ding, Dexin Jia, Min Yang, Yan Yu, Guochang Lin, Xuelin Zhang- Physical and Theoretical Chemistry
- Atomic and Molecular Physics, and Optics
The Fenton‐like reaction induced by cerium oxide (CeO2) usually involves two reaction processes: one is similar to the classical Fenton reaction where cerium (Ce3+) decomposes hydrogen peroxide (H2O2) to produce reactive oxygen species (ROS), and the other is the complexation of H2O2 to form peroxides. However, the influences of CeO2 with different morphologies in the two reaction processes have not been extensively investigated. Therefore, three typical morphologies of CeO2 were prepared in this study, including lab‐synthesized rods, cubes and purchased commercial spheres. The generation of ROS and peroxides was examined using the 3,3,5,5‐tetramethylbenzidine (TMB) oxidation assay and H2O2 reduction current measurement, respectively. The apoptosis assay and acid orange 7 (AO7) degradation analysis further verified the application fields of products. R‐CeO2 mainly complexed H2O2 to form peroxides for the most robust degradation of AO7. While C‐CeO2 mainly decomposed H2O2 to generate ROS for the most substantial ability to damage A549.