Department of Chemistry, Government Nagarjuna Post Graduate College of Science, Raipur 492010, Chhattisgarh, India.
School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur 492010, Chhattisgarh, India.
ACS Appl Bio Mater. 2023 Apr 17;6(4):1488-1494. doi: 10.1021/acsabm.2c01030. Epub 2023 Mar 20.
Beta-cyclodextrin (β-CD) stabilized cerium oxide nanoparticles (β-CD@CeO NPs) were synthesized through a hydrothermal route. The electronic properties, surface functional group, surface composition, size, and morphologies of the as-synthesized β-CD@CeO NPs were characterized using UV-visible spectroscopy, FTIR analysis, high resolution X-ray photoelectron spectroscopy (HRXPS), high resolution transmission electron microscopy (HRTEM), and field emission scanning electron microscopy (FESEM). The pH-dependent variation of the ζ-potential of β-CD@CeO NPs and the catalytic activity of the NPs for the hydrolysis of paraoxon were investigated. The observed pseudo-first-order rate constant () for the hydrolysis of paraoxon is increased with increasing pH and the ζ-potential of β-CD@CeO NPs. The kinetics and mechanism of hydrolysis of paraoxon in the aqueous and cationic micellar media have been discussed.
β-环糊精（β-CD）稳定的氧化铈纳米粒子（β-CD@CeO NPs）通过水热法合成。采用紫外-可见分光光度法、傅里叶变换红外分析、高分辨率 X 射线光电子能谱（HRXPS）、高分辨率透射电子显微镜（HRTEM）和场发射扫描电子显微镜（FESEM）对合成的β-CD@CeO NPs 的电子特性、表面官能团、表面组成、尺寸和形貌进行了表征。研究了β-CD@CeO NPs 的 ζ-电位随 pH 值的变化以及 NPs 对对氧磷水解的催化活性。观察到对氧磷水解的拟一级速率常数（kobs）随 pH 值和β-CD@CeO NPs 的 ζ-电位的增加而增加。讨论了在水相和阳离子胶束介质中对氧磷水解的动力学和机制。
