New iodocuprate-containing ionic liquids with high thermostability were designed, prepared and evaluated as hypergolic reaction promoters between an energetic ionic fuel and a H₂O₂ “green” oxidizer.

Combining layered double hydroxides with Fe ₃ O ₄ nanoparticles resulted in the desired “cut-off switch” for threshold temperature towards magnetic hyperthermia.

Perovskites LaNi_0.8Fe_0.2O₃ and LaNi_0.8Mn_0.2O₃ were synthesized using the co-precipitation method by substituting 20 mol.% of the Ni-site with Fe and Mn, respectively. Temperature programmed reduction (TPR) showed that the exsolution process in the Fe- and Mn-substituted perovskites followed a two-step and three-step reduction pathway, respectively. Once exsolved, the catalysts were found to be able to regenerate the original perovskite when exposed to an oxygen environment but with different crystallographic properties. The catalytic activity for both materials after exsolution was measured for the methane dry reforming (DRM) reaction at 650 °C and 800 °C. Catalyst resistance against nickel agglomeration, unwanted phase changes, and carbon accumulation during DRM were analyzed using X-ray diffraction (XRD), transmission electron microscopy (TEM), and thermogravimetric analysis (TGA). The presence Fe alloying in the catalyst particles after exsolution from LaNi_0.8F_e0.2O₃ led to a lower methane conversion compared to the catalyst derived from LaNi_0.8Mn_0.2O₃ where no alloying occurred.

In the current work, we report the loading of cefotaxime sodium on Mg–Al layered double hydroxide (Cefo-LDH) and the formation of a nanohybrid with a fenugreek polymer (CLF nanohybrid). This nanohybrid was synthesized through the method of anion-exchange followed by sonication. The as-synthesized CLF nanohybrid was thoroughly characterized by XRD, FTIR and zeta potential measurements, which revealed that the cefotaxime drug was bound to the LDH surface. The drug loading capacities of Cefo-LDH and the CLF nanohybrid were found to be 85.6 and 72.5 μg mg⁻¹, respectively. The drug released from the CLF nanohybrid demonstrates a controlled and sustained profile at pH 7.3 over a period of 72 h. The mechanism of drug release is explained by the first-order and parabolic kinetic models. The kinetic models suggest that the release of cefotaxime is dependent on the dissolution and diffusion of drug molecules in the physiological medium. At a concentration up to 1 mg mL⁻¹, both Cefo-LDH and the CLF nanohybrid are seen to be biocompatible with murine fibroblast (L929) cells. Furthermore, antibacterial activity studies against the cefotaxime drug-resistant Escherichia coli (E. coli) strain show about 98% cell mortality with 1 mg mL⁻¹ of the nanohybrid loaded with cefotaxime.