Journal of The Chinese Chemical Society最新文献

Focus of the figure: The photocatalytic degradation performance of biosynthesized nanoparticles for the eco-purification of pharmaceutical-polluted water was studied and demonstrated to be an economical remediation method with remarkable recyclability potential. Overall, the biogenic entities' oxygenated functional groups employed for nanoparticle biosynthesis contributed to the •OH and O2• dominance in the photocatalytic degradation operation. More details about this figure will be discussed by Dr. Stephen S. Emmanuel and his co-workers on pages 1332-1357 in this issue.

Focus of the figure: Spray pyrolysis being as a low-cost synthesis technique to prepare CuMnO₂ thin films that deliver the enhanced performance of the photoelectrocatalytic water splitting reaction. More details about this figure will be discussed by Dr. Ming-Hsi Chiang and his co-workers on pages 1203-1210 in this issue.

In order to study the catalytic activity of beta cyclodextrin-encapsulated zinc oxide (ZnO) nanoparticles in microbial oil synthesis, rice-washed waste water (RWW) was used as the fermentation medium and streptomyces fradiae as the microbe. The introduction of zinc oxide nanoparticles during fermentation had an impact on output and growth. The biomass percentage was 1.5 times greater and the fatty acid profile was better than in the control samples. The analysis of the induction period (IP) revealed that samples containing zinc oxide nanoparticles had maximum oxidation stability for up to 120 days of storage, along with a considerable reduction in autoxidation. The cetane number and calorific value, however, increased with the addition of ZnO nanoparticles. A new study discovered that the use of ZnO nanoparticles encapsulated in β-CD led to much increased production (63.5 g/L) of microbial oil than the control sample (42.5 g/L). Therefore, it is anticipated that these nanoparticles would find utility in energy-related applications.

Electronic and thermoelectric properties of the full-Heusler materials Co₂CrGe, Co₂FeGe, and Co₂NiGa are studied, using first-principles full potential linearized augmented plane waves method. To treat the exchange correlation, Generalized Gradient Approximation parameterized by PBE-sol with the inclusion of spin polarization is used. The frequency fluctuation order is continual at 300 K after heating to 3 ps with very small distraction in the atomic structure conforming the structure stability of the studied structures. Also inclusion of spin-orbit coupling effect on density of states undermines significant change in peaks specially d-states in the materials and caused a degeneracy. Band structure analysis clarified that states crossing the Fermi level have the importance for enhancing the thermoelectric properties of the materials. The topology of the states indicates a gap at the bulk level, which is the unique character of the heavy elements in the materials Co₂CrGe, Co₂FeGe, and Co₂NiGa. Thermoelectric properties are calculated for a temperature of 300 K using semi-classical Boltzmann's theory implemented in BoltzTraP code. In these calculations, it is found that these materials favor electron doping with having maximum values of ZT in the n-type region.

In the current research, the rare earth-doped magnesium aluminate (MgAl₂O₄:Eu³⁺) spinels were produced by the combustion synthesis method. The employment of thermodynamic calculations revealed that the combustion approach is a proper way to synthesize MgAl₂O₄:Eu³⁺ material by urea fuel, although this procedure was fulfilled at 500°C, the final temperature will be around 2030°C. The x-ray and FT-IR spectra confirmed the successful formation of spinels, while it was shown that the calcination procedure results in a significant increase of crystallinity. On the other hand, it was interestingly seen that the addition of large amounts of Eu³⁺dopant (10 wt%) suppresses the crystallinity. The MAUD calculations interestingly revealed that the increase of Eu³⁺ dopant from 1 to 10 wt% leads to the increase of MgO and Al₂O₃ impurities. The related microstructural evaluations revealed that the particle size of the synthesized powders is mostly less than 40 nm which shows the superiority of combustion synthesis over other commercial methods. Also, the broadening of XRD peaks confirmed the formation of nano-sized powder. The photoluminescence (PL) characterizations showed that doping of MgAl₂O₄ with 7 wt% Eu³⁺ brings the most intensive emission properties at the wavelengths of 592 and 617 nm.

Metal nanoparticles (NPs) have emerged as crucial components in precision drug delivery, presenting innovative opportunities to significantly enhance therapeutic efficacy and targeting accuracy. This review investigates recent developments in the engineering of metal NPs, emphasizing their distinctive properties and novel applications in drug delivery systems. A comprehensive analysis is performed on gold, silver, iron, and zinc oxide NPs, emphasizing their exceptional physicochemical properties and enhanced drug-loading capacities. These features collectively enable the development and implementation of targeted and controlled drug delivery systems, indicating a new era of advanced therapeutic approaches. This review article accomplishes this by reflecting on the transformative potential of metal NPs, envisioning heightened efficacy, minimized side effects, and improved patient outcomes within the dynamic landscape of drug delivery platforms.