نتایج جستجو برای: fe3o4

تعداد نتایج: 5032  

2017
Guizhen Li Xiaoqin Wang

Different kinds of deep eutectic solvents (DES) based on choline chloride (ChCl) and ionic liquids (ILs) based on 1-methylimidazole were used to modify Fe3O4/molecularly imprinted polymers (Fe3O4/MIPs), and the resulting materials were applied for the rapid purification of alkaloid isomers (theobromine and theophylline) from green tea with magnetic solid-phase extraction (M-SPE). The M-SPE proc...

Journal: :Chemical communications 2015
Yangzhi Zhu Xiangcun Li Gaohong He Xinhong Qi

Magnetic C-C@Fe3O4 hollow microspheres were prepared by using aerosol-based Fe3O4@C-SiO2 core-shell particles as templates. The magnetic double-shelled microspheres efficiently worked as carriers to load Pt nanoparticles, thus making the catalyst recyclable and reusable.

Journal: :Chemical communications 2015
Xiao-Dong Zhu Ke-Xin Wang Du-Juan Yan Shi-Ru Le Ru-Jia Ma Ke-Ning Sun Yi-Tao Liu

A novel three-dimensional MoS2@Fe3O4 nanohybrid, composed of tubular MoS2 uniformly and densely decorated with particulate Fe3O4, is constructed, which exhibits significantly improved lithium storage performances through an impressive synergistic interplay between the two active materials.

Journal: :Physical chemistry chemical physics : PCCP 2017
Xiaohu Yu Xuemei Zhang Lingxia Jin Gang Feng

By means of density functional theory calculations that account for the on-site Coulomb interaction via a Hubbard term (DFT+U), we systematically investigated CO adsorption on Fe3O4 surfaces at different coverages. It has been found that more than one CO can coadsorb on one surface iron atom on both Fetet1 and Feoct2 terminations of Fe3O4(111). The uncapped oxygen atom is the active site for CO...

2017
Qianchun Zhang Yulan Liu Xingyi Wang Huimin Li Junyu Chen

A novel method was proposed for the determination of five benzimidazoles (oxfendazole, mebendazole, flubendazole, albendazole, and fenbendazole) using magnetic graphene (G-Fe3O4). G-Fe3O4 was synthesized via in situ chemical coprecipitation. The properties of G-Fe3O4 were characterized by various instrumental methods. G-Fe3O4 exhibited a great adsorption ability and good stability towards analy...

2016
Fang Peng Qi Wang Rongjia Shi Zeyi Wang Xin You Yuhong Liu Fenghe Wang Jay Gao Chun Mao

A novel and efficient catalyst is one of the goals in the material field, and the involvement of nanoscience and technology has brought new vigor to the development of catalyst. This research aimed to develop a simple two-step route to fabricate Fe3O4@PS/PDA-Ag hybridnanotubes with size-controllable and highly dispersed silver nanoparticles (NPs). First, Fe3O4@PS nanotubes of a sound mechanical...

2017
Arati G. Kolhatkar Yi-Ting Chen Pawilai Chinwangso Ivan Nekrashevich Gamage C. Dannangoda Ankit Singh Andrew C. Jamison Oussama Zenasni Irene A. Rusakova Karen S. Martirosyan Dmitri Litvinov Shoujun Xu Richard C. Willson T. Randall Lee

This paper highlights the relation between the shape of iron oxide (Fe3O4) particles and their magnetic sensing ability. We synthesized Fe3O4 nanocubes and nanospheres having tunable sizes via solvothermal and thermal decomposition synthesis reactions, respectively, to obtain samples in which the volumes and body diagonals/diameters were equivalent. Vibrating sample magnetometry (VSM) data show...

2015
Trevor P. Almeida Adrian R. Muxworthy Takeshi Kasama Wyn Williams Christian Damsgaard Cathrine Frandsen Timothy J. Pennycook Rafal E. Dunin-Borkowski

The effect of maghemization on the magnetic properties of magnetite (Fe3O4) grains in the pseudo-single-domain (PSD) size range is investigated as a function of annealing temperature. X-ray diffraction and transmission electron microscopy confirm the precursor grains as Fe3O4 ranging from 150 to 250 nm in diameter, whilst M€ ossbauer spectrometry suggests the grains are initially near-stoichiom...

2016
Lei Ji Tao Yan Yan Li Jian Gao Qi Wang Lihua Hu Dan Wu Qin Wei Bin Du

A novel carbon encapsulated Fe3O4 nanoparticles embedded in two-dimensional (2D) porous graphitic carbon nanocomposites (Fe3O4@C@PGC nanocomposites) were synthesized by situ synthesis strategy, which provided a sensor platform owing to a large aspect ratio and porous structure. Polydopamine (PDA) were modified on the surface of Fe3O4@C@PGC nanocomposites through self-polymerization of dopamine,...

2017
Wenxia Wang Kaijun Xiao Liang Zhu Yurong Yin Zhaomei Wang

A facile, robust approach to the synthesis of Fe3O4/rGO/TiO2 nanocomposites is described. The synthesis involves two major steps: (1) preparation of Fe3O4/GO by an electrostatic self-assembly method; (2) deposition of TiO2 on the surface of the Fe3O4/rGO nanocomposite via a hydrothermal method. The asprepared Fe3O4/rGO/TiO2 photocatalyst exhibited an enhanced photocatalytic activity for the deg...

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