Decoding the Reactivity Enhancement of LnCeO Compounds (Ln = Yb, Y, Tb, and Gd) for Soot Combustion: The Remarkable Contribution of Variable Valence A-Sites.

The impact of variable valence A-sites on the redox property and reactivity of LnCeO compounds in soot particulate combustion has been investigated. It was observed that YbCeO, YCeO, and GdCeO formed a rare earth C-type phase, while TbCeO formed a solid solution phase. Both TbCeO and YbCeO possess dual valence state A-sites, resulting in significantly more surface vacancies.

Comparing BaZrO Perovskite and LaZrO Pyrochlore for Oxidative Coupling of Methane (OCM): The Importance of Basic Sites vs Oxygen Vacancies.

LaZrO pyrochlore with intrinsic oxygen vacancies and BaZrO perovskite without intrinsic oxygen vacancies were synthesized for the OCM reaction. It has been revealed that the OCM performance and surface selective oxygen species of BaZrO are higher than that of LaZrO under the reaction condition. This is because BaZrO possesses more basic sites than LaZrO, and thus it can stabilize the OCM reactive oxygen species better at elevated temperature.

The controlled engineering of surface oxygen defects on BiZrO compounds for catalytic soot combustion by adjusting the preparation methods.

The quantity of surface oxygen vacancies/defects is critical to promote the reactivity of metal oxide catalysts. Therefore, for the controlled engineering of BiZrO with rich surface defects for soot combustion, four different methods have been adopted. BiZrO compounds with a defective fluorite phase but with varied surface vacancy concentrations have been successfully synthesized by various methods.

Vitamin D and curcumin-loaded PCL nanofibrous for engineering osteogenesis and immunomodulatory scaffold.

The accelerating bone healing process is still a major challenge in clinical orthopedics, especially in critical-sized bone defects. Recently, Nanofiber membranes are showing increasing attention in the biomedical field due to their good biocompatibility, mechanical stability, and the ability to work as a drug carrier to achieve localized and sustained drug delivery. Herein, a multifunction nanofiber membrane loaded with vitamin D (Vit D) and curcumin (Cur) was successfully fabricated using electrospinning technology.