Nanoscale Cerium Oxide: Synthesis, Biocatalytic Mechanism, and Applications

Abstract

Nanoscale cerium oxide has excellent catalytic performance due to its unique surface properties and has very important applications in various fields. In this paper, the synthesis methods, catalytic mechanism and activity regulation of nanoscale cerium oxide in recent years are reviewed. Secondly, the application of cerium oxide in the detection of organic and inorganic molecules is summarized, and its latest progress and applications in antibacterial, antioxidant and anticancer are discussed. Finally, the future development prospect of nanoscale cerium oxide is summarized and prospected.

Effects of CeO2 Nanoparticles on Nutritional Quality of Two Crop Plants, Corn (Zea mays L.) and Soybean (Glycine max L.)

“…Nano-sized CeO 2 has oxygen vacancies and defects on the surface, which enables the reversible shift of Ce oxidation states between +3 and +4 depending on the availability of O atoms. The change of valence allows Ce NPs to store O (Ce(IV)O 2 ) under oxidizing conditions and to release O (Ce 2 (III)O 3 ) under reducing conditions, giving CeO 2 NPs the ability to act as catalysts for redox reactions [ 11 , 12 ].…”

Self-assembled three-dimensional hydrogels based on graphene derivatives and cerium oxide nanoparticles: scaffolds for co-culture of oligodendrocytes and neurons derived from neural stem cells

“…43,44 It is well known that cerium oxide can exhibit +3 and +4 states that support the formation of CeO 2 and CeO 2−x and provides antioxidant properties. 51 CeO 2 nanoparticles resemble the antioxidant enzymes superoxide dismutase (SOD) and catalase (CAT) and, hence, scavenge reactive oxygen species (ROS) and free radicals 51,52 in physiological conditions. 45,53,54 Here, we applied a concentration of 50 µM hydrogen peroxide (H 2 O 2 ) and measured the antioxidant capabilities of the hydrogels containing increasing amounts of CeO 2 nanoparticles.…”

Facile Synthesis of Stable Cerium Dioxide Sols in Nonpolar Solvents

“…Nanoscale cerium dioxide has a number of specific properties, including the ability to participate in reversible redox processes at physiological temperatures, extremely low solubility (p K sp ~ 59), the ability to mimic the functions of many natural enzymes, and low toxicity [ 1 , 2 , 3 , 4 , 5 ]. In this regard, it is the material of choice for a number of modern biomedical applications [ 6 , 7 , 8 , 9 ]. The biological activity of nanoscale CeO 2 is governed by the high reactivity of its surface and the ability to interact with various organic compounds [ 10 ], as well as the high mobility of its oxygen sublattice [ 11 , 12 , 13 ].…”