Faculty of Pharmacy, Duy Tan University, Da Nang 550000, Viet Nam.
Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia.
Chemosphere. 2023 Dec;345:140487. doi: 10.1016/j.chemosphere.2023.140487. Epub 2023 Oct 22.
A sol-gel method was used to synthesize the cerium dioxide nanoparticles. The nanoparticles formed were then characterized with UV-visible spectrophotometry, Fourier Transform Infrared Spectrophotometer (FTIR), SEM-EDAX, XRD, and Dynamic Light Scattering (DLS). The UV-visible absorbance at 282 nm and characteristic peak at 600-4000 cm provided insight into the formation of cerium dioxide nanoparticles using a chemical method. SEM analysis and EDAX analysis confirmed nanoparticle formation and elements within the nanoparticles based on their irregular morphology. The hydrodynamic size obtained from the DLS analysis was 178.4 nm and the polydispersity was 0.275 nm. Furthermore, XRD results confirmed the crystalline nature of cerium dioxide nanoparticles. Using batch adsorption as a method, the effect of concentration of Polycyclic Aromatic Hydrocarbons (PAH), adsorbent concentration, pH, and irradiation source was investigated. Under UV light conditions, 10 μg/mL cerium dioxide nanoparticle at pH 5 degraded 2 μg/mL of PAH (anthracene and fluorene). Consequently, the synthesized cerium dioxide nanoparticles were effective photocatalysts. For anthracene and fluorene, kinetic studies showed the degradation process followed pseudo-second-order kinetics and Freundlich isotherms. Cerium oxide also exhibited significant antimicrobial and antibiofilm activity against bacteria and fungi. As a result, the cerium dioxide nanoparticle has proved to be a highly effective photocatalytic tool for the degradation of PAHs and exhibits strong antimicrobial activity.
采用溶胶-凝胶法合成了二氧化铈纳米粒子。然后采用紫外可见分光光度法、傅里叶变换红外光谱仪（FTIR）、SEM-EDAX、XRD 和动态光散射（DLS）对纳米粒子进行了表征。在 282nm 的紫外可见吸收和 600-4000cm 的特征峰提供了使用化学方法形成二氧化铈纳米粒子的见解。SEM 分析和 EDAX 分析证实了纳米粒子的形成以及纳米粒子内部的元素，基于它们的不规则形态。通过 DLS 分析获得的水动力粒径为 178.4nm，多分散性为 0.275nm。此外，XRD 结果证实了二氧化铈纳米粒子的结晶性质。采用批量吸附作为方法，研究了多环芳烃（PAH）浓度、吸附剂浓度、pH 值和辐射源对其的影响。在紫外光条件下，10μg/mL 的二氧化铈纳米粒子在 pH 5 时可降解 2μg/mL 的 PAH（蒽和芴）。因此，合成的二氧化铈纳米粒子是有效的光催化剂。对于蒽和芴，动力学研究表明降解过程遵循准二级动力学和 Freundlich 等温线。氧化铈还对细菌和真菌表现出显著的抗菌和抗生物膜活性。因此，二氧化铈纳米粒子已被证明是一种高效的用于 PAHs 降解的光催化工具，并表现出强大的抗菌活性。
