Preparation and Characterization of an Antibrowning Nanosized Ag-CeO Composite with Synergistic Antibacterial Ability.

Nanosized Ag and CeO particles obtained through the hydrothermal method were physically mixed to obtain composite antibacterial agents. The comparative experiments of antibacterial properties showed that the antibacterial activity of the nanocomposites was improved compared to the nanoparticles alone, which indicated that the synergistic antibacterial effect existed between Ag and CeO. On the one hand, ICP-MS results showed that the existence of CeO suppressed the silver ion release rate and provided the composite with the ability of antibrowning; on the other, EPR data indicated that more hydroxyl radicals (·OH) were generated by the interfacial interaction between nanosized Ag and nanosized CeO.

Roles of Oxygen Vacancies of CeO and Mn-Doped CeO with the Same Morphology in Benzene Catalytic Oxidation.

Mn-doped CeO and CeO with the same morphology (nanofiber and nanocube) have been synthesized through hydrothermal method. When applied to benzene oxidation, the catalytic performance of Mn-doped CeO is better than that of CeO, due to the difference of the concentration of O vacancy. Compared to CeO with the same morphology, more oxygen vacancies were generated on the surface of Mn-doped CeO, due to the replacement of Ce ion with Mn ion.

Preparation of Ce⁻Mn Composite Oxides with Enhanced Catalytic Activity for Removal of Benzene through Oxalate Method.

The catalytic activities of CeO₂-MnO composite oxides synthesized through oxalate method were researched. The results exhibited that the catalytic properties of CeO₂-MnO composite oxides were higher than pure CeO₂ or MnO. When the Ce/Mn ratio was 3:7, the catalytic activity reached the best.

Effects of Hollow CeO₂ Nanospheres on Flame Retardance and Smoke Suppression of Room-Temperature-Vulcanized Silicone Rubber.

The effects of hollow CeO₂ nanospheres on the flame-retardance and smoke-suppression properties of room-temperature-vulcanized (RTV) silicone rubber were studied. It was observed that the flame retardance of RTV silicone rubber composites was improved by hollow CeO₂ nanospheres. Surprisingly, the nanospheres also enhanced the smoke-suppression characteristics of the composites.

Hierarchical Structure and Catalytic Activity of Flower-Like CeO₂ Spheres Prepared Via a Hydrothermal Method.

Hierarchical CeO₂ particles were synthesized by a hydrothermal method based on the reaction between CeCl₃·7H₂O and PVP at 270 °C. The flower-like CeO₂ with an average diameter of about 1 μm is composed of compact nanosheets with thicknesses of about 15 nm and have a surface area of 36.8 m²/g, a large pore volume of 0.

Catalytic Degradation of Benzene over Nanocatalysts containing Cerium and Manganese.

A Ce-Mn composite oxide possessing a rod-like morphology (with a fixed molar ratio of Ce/Mn=3:7) was synthesized through a hydrothermal method. Mn ions were doped into a CeO framework to replace Ce ions, thereby increasing the concentration of oxygen vacancies. The formation energies of O vacancies for the Ce-Mn composite oxide were calculated by applying density functional theory (DFT).

Comparative study of CeO2 and doped CeO2 with tailored oxygen vacancies for CO oxidation.

We report on the preparation and characterization of CeO(2) nanofibers (CeO(2)-NFs) and nanocubes (CeO(2)-NCs), as well as Sm- and Gd-doped CeO(2) nanocubes (Sm-CeO(2)-NCs and Gd-CeO(2)-NCs), synthesized by a simple hydrothermal process for CO catalytic oxidation. The samples were characterized by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), Raman spectroscopy, and photoluminescence spectroscopy. Their oxygen-storing capacity (OSC) was examined by means of hydrogen temperature-programmed reduction (H(2)-TPR) and oxygen pulse techniques.