Article
Chemistry, Physical
Juan Ding, Ligang Cheng
Summary: The Fe3O4@SiO2@PANI ternary nanocomposite, prepared through a three-step method, demonstrates excellent microwave absorption properties with high RLmax and absorption bandwidth, making it a promising material for microwave absorbers in the field of electromagnetic waves.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Chun-Rong Lin, Oxana S. Ivanova, Dmitry A. Petrov, Alexey E. Sokolov, Ying-Zhen Chen, Marina A. Gerasimova, Sergey M. Zharkov, Yaw-Teng Tseng, Nicolay P. Shestakov, Irina S. Edelman
Summary: Fe3O4@SiO2 core-shell nanoparticles were synthesized and functionalized for studying their magnetic, structural, and adsorption properties. The magnetic core of the nanoparticles showed nanocrystalline structure with an amorphous silica shell, and the nanoparticles exhibited high saturation magnetization. The adsorption studies on three dyes showed that the nanoparticles followed pseudo-second order kinetics and had maximum adsorption capacity for Congo red according to the Langmuir isotherm.
Article
Nanoscience & Nanotechnology
Xiaohan Meng, Ze Lv, Liyin Shi, Tianzhen Jiang, Shaoyang Sun, Yan Li, Jianguo Feng
Summary: A novel composite Fe3O4@ZIF-8@SiO2 nanoparticle was synthesized to remove pyrethroid insecticides from water. The prepared nanoparticles showed excellent adsorption performance and high dispersibility, and could be easily separated from water using a magnetic field. This study provides a potential design for recoverable and reusable nanoparticles in wastewater treatment.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Arka Chaudhuri, Rupali Rakshit, Kazunori Serita, Masayoshi Tonouchi, Kalyan Mandal
Summary: This study successfully synthesized magnetite nanoparticles and nano-hollow spheres of different diameters, which were coated with silica and found to be useful as electromagnetic shielding devices. The detailed morphology and size-dependent terahertz absorption study further supported their potential applications.
IEEE TRANSACTIONS ON MAGNETICS
(2021)
Article
Nanoscience & Nanotechnology
Xiaolei Li, Han Lin, Qianli Li, Jingyi Xue, Yue Xu, Lin Zhuang
Summary: A novel nanoscale fluorescent probe has been developed for high-response detection and removal of fluoride ions using a mechanism of nonradiative electron transfer, showing recyclable performance and wide linear response range.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Lucia Garcia, Eneko Garaio, Alberto Lopez-Ortega, Itziar Galarreta-Rodriguez, Laura Cervera-Gabalda, Guillermo Cruz-Quesada, Alfonso Cornejo, Julian J. Garrido, Cristina Gomez-Polo, Jose Ignacio Perez-Landazabal
Summary: Hybrid magnetic nanoparticles consisting of an iron oxide core and a mesoporous SiO2 shell were synthesized. The nanoparticles exhibited high magnetization, large surface area, and efficient drug delivery. The controlled drug release efficiency and heating response of the nanoparticles were achieved using an external AC magnetic field.
Article
Materials Science, Multidisciplinary
Samin Habibi, Steven Bryant, Roman Shor, Giovanniantonio Natale
Summary: The study focuses on creating monodisperse magnetic particles by depositing a magnetite layer on the surface of silica particles using a low-temperature electroless deposition technique. This technique, scalable and suitable for mass production, can be applied to a wide range of inorganic materials or polymer particles. The resulting SiO2@Fe3O4 core/shell particle is responsive to magnetic fields and shows promise for applications in magnetorheological fluids.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Physical
Mahsa Khoshnam, Hamidreza Salimijazi
Summary: In this study, a novel magnetic-photocatalytic core/double-layer-shell of Fe3O4/SiO2/a-Fe2O3 particles was synthesized via a developed sol-gel method, with each stage characterized using XRD, FTIR, and VSM. The particles exhibited an average size of 250 nm and showed high photo-degradation efficiency towards dye contaminations in a short period of time.
SURFACES AND INTERFACES
(2021)
Article
Chemistry, Physical
Mohammad Mahdi Eshaghi, Mehrab Pourmadadi, Abbas Rahdar, Ana M. Diez-Pascual
Summary: A pH-responsive nanocarrier composed of carboxymethyl cellulose and core-shell nanoparticles of Fe3O4@SiO2 was prepared for quercetin delivery. The nanoparticles were entrapped in an emulsion system to achieve sustained release. The results showed that CMC/Fe3O4@SiO2 could be a promising system for cancer therapy.
Article
Nanoscience & Nanotechnology
Xin Ge, Hui Zhang, Meng Ge, Xuemin Liu, Shuang Yuan
Summary: In this study, heterogeneous copper nanoparticle catalysts supported on magnetic nitrogen-doped carbon-silica materials with a core-shell structure were successfully fabricated. These catalysts exhibited excellent catalytic activity for aqueous C-N coupling reactions and showed good universality toward various aryl halides and nitrogen nucleophiles. Moreover, the catalysts were easily recoverable and showed stable performance over multiple reaction cycles.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Applied
Jaya Verma, Avi Gupta, Deepak Kumar
Summary: This research focused on developing a highly efficient and cost-effective multifunctional nanocoating by incorporating silica-titania core-shell particles into polyurethane for various applications. The core-shell structure combined the mechanical properties improvement of silica with the antimicrobial and hydrophobic enhancement of titania. Through testing and analysis, it was found that a concentration of 4% (wt) of nano core-shell particles in the PU coating system produced the best results for multipurpose applications.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Chemistry, Inorganic & Nuclear
Yunfeng Lei, Xuezhong Zhang, Xiangyu Meng, Zhifei Wang
Summary: This study developed multi-carboxyl functionalized Fe3O4@SiO2 magnetic nanoparticles (mCMNPs) through simplified modification strategies for the removal of methylene blue (MB) in water treatment. It was found that increasing the carboxyl content on the surface of CMNPs significantly improved the removal process. Among different types of CMNPs, mCMNPs with the highest surface carboxyl densities showed the highest removal efficiency. Optimized parameters including solution pH, initial MB concentration, and sorption time were determined to achieve the best removal efficiency. The synthesized mCMNPs exhibited excellent regeneration ability and recyclability, making them a promising adsorbent for the removal of MB in water treatment.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Jin Soon Han, Gye Seok An
Summary: The rapid purification of biomaterials like DNA, RNA, and antibodies has garnered significant attention, especially with the COVID-19 pandemic. Research on core-shell-structured superparamagnetic nanoparticles, specifically Fe3O4@SiO2 nanoparticles for separating nucleic acids, is ongoing. This study proposed a method to fabricate dual-layered Fe3O4@SiO2 nanoparticles with controlled SiO2 shell density and conducted structural, morphological, and magnetic analyses, revealing promising results for their application in biopurification. With the optimal conditions suggested based on the selective separation of plasmid DNA, this research contributes to the advancement of biomaterial purification techniques.
Article
Chemistry, Physical
Ben Chen, Tingting Lin, Haibo You, Liqun Fang, Chu Chu, Jintao Yang, Shengqiang Tong
Summary: This study reports for the first time the bonding of sulfobutylether-beta-cyclodextrin (SBE-beta-CD) to the surface of SiO2 coated magnetic nanoparticles using carbodiimide activation. These functionalized magnetic nanoparticles show higher enantiorecognition in enantioselective liquid-liquid extraction compared to traditional SBE-beta-CD.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Physical
Ben Chen, Tingting Lin, Haibo You, Liqun Fang, Chu Chu, Jintao Yang, Shengqiang Tong
Summary: This study reported for the first-time modification of the surface of SiO2 coated magnetic nanoparticles by bonding SBE-β-CD via carbodiimide activation. Characterization results showed that these functionalized nanoparticles exhibited higher enantiorecognition in enantioselective liquid-liquid extraction for certain racemates.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
