催化作用
纳米颗粒
吸附
针状的
化学
亚甲蓝
磁性纳米粒子
热分解
光化学
化学工程
无机化学
材料科学
有机化学
结晶学
纳米技术
微观结构
工程类
光催化
作者
J. S. Trujillo Hernández,Alberto Aragón-Muriel,Willinton Corrales Quintero,Juan Camilo Castro Velásquez,Natalia Andrea Salazar-Camacho,G. A. Pérez Alcázar,J. A. Tabares
出处
期刊:Molecules
[MDPI AG]
日期:2022-12-16
卷期号:27 (24): 8976-8976
被引量:1
标识
DOI:10.3390/molecules27248976
摘要
The aim of this study is to evaluate the applicability of the catalytic activity (CA) of the Fe3O4 magnetic system in the adsorption/degradation of methylene blue and esterification. The thermal decomposition method allowed the preparation of Fe3O4 nanoparticles. The crystallites of the Fe3O4 structural phase present an acicular form confirmed by X-ray diffraction. Transmission electron microscopy results identified the acicular shape and agglomeration of the nanoparticles. Mössbauer spectroscopy showed that the spectrum is composed of five components at room temperature, a hyperfine magnetic field distribution (HMFD), two sextets, a doublet, and a singlet. The presence of the HMFD means that a particle size distribution is present. Fluorescence spectroscopy studied the CA of the nanoparticles with methylene blue and found adsorption/degradation properties of the dye. The catalytic activity of the nanoparticles was evaluated in the esterification reaction by comparing the results in the presence and absence of catalyst for the reaction with isobutanol and octanol, where it is observed that the selectivity for the products MIBP and MNOP is favored in the first three hours of reaction.
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