Fe 3 O 4 @ZIF-8@SiO 2 Core–Shell Nanoparticles for the Removal of Pyrethroid Insecticides from Water

作者：Xiaohan Meng, Ze Lv, Liyin Shi, Tianzhen Jiang, Shaoyang Sun, Yan Li, Jianguo Feng · 发表于：ACS Applied Nano Materials · 年份：2023 · DOI：10.1021/acsanm.3c00168 · 被引用次数：32 · 研究领域：Adsorption and biosorption for pollutant removal、Nanoparticle-Based Drug Delivery、Analytical chemistry methods development

Residues of pyrethroid pesticides in aquatic environments seriously threaten aquatic organisms and the human health. Herein, a novel highly dispersed and recyclable composite ZIF-8 and SiO 2 double-layer-modified Fe 3 O 4 nanoparticle, named Fe 3 O 4 @ZIF-8@SiO 2 nanoparticle, was synthesized via a layer-by-layer assembly method to remove pyrethroid insecticides (namely, fenvalerate, β-cyfluthrin, and tetramethrin) from water. The physical properties of the Fe 3 O 4 @ZIF-8@SiO 2 nanoparticles were characterized via scanning electron microscopy, elemental mapping, energy-dispersive X-ray spectroscopy, X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, inductively coupled plasma spectroscopy, thermogravimetric analysis, Brunauer–Emmett–Teller surface area analysis, dispersion analysis, and vibrating sample magnetometry. The prepared Fe 3 O 4 @ZIF-8@SiO 2 nanoparticles exhibited excellent adsorption performance and high dispersibility and could be rapidly separated from water using an external magnetic field. The Fe 3 O 4 @ZIF-8@SiO 2 nanoparticles exhibited the strongest adsorption effect at an adsorbent dosage of 10 mg, an adsorption time of 40 min, and a pH of 7. The fitted model for the adsorption process was consistent with the proposed secondary kinetic model and Sips isotherm model. The Fe 3 O 4 @ZIF-8@SiO 2 nanoparticles exhibited maximum adsorption capacities of 316.23, 364.43, and 258.69 mg g –1 for fenvalerate, β-cyfluthrin, ...