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Fast synthesis of dopamine-coated Fe_3O_4 nanoparticles through ligand-exchange method

Chinese Chemical Letters 2012年第9期23卷 1099-1102页

作者： Peng An Fang Zuo Yuan Peng Wu Jun Hua Zhang Zhao Hui Zheng Xiao Bin Ding Yu Xing Peng Chengdu Institute of Organic Chemistry Chinese Academy of SciencesChina Chengdu 610041 Graduate School of the Chinese Academy of Sciences China Beijing 100049 State Key Laboratory of Polymer Materials and Engineering of China Polymer Research InstituteSichuan UniversityChina Chengdu 610065 College of Chemistry&Environment Protection Engineering Southwest University for NationalitiesChina Chengdu 610041 State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation So0uthwest Petroleum University(SWPU)China Chengdu 610500

A fast approach was described for the synthesis of water-dispersible monodisperse dopamine-coated Fe304 nanoparticles （DA- Fe304） with uniform size and shape via ligand-exchange of oleic acid on Fe304 using only 2 min. The prepared DA-Fe304 nanoparticles were characterized by transmission electron microscopy, Fourier transform infrared spectrometry, and vibrating sample magnetometer. The results indicated that the resulting DA-Fe304 nanoparticles had an average diameter of about 19.2 nm. The magnetic saturation value of the prepared DA-Fe304 nanoparticles was determined to be 72.87 emu/g, which indicating a well- established superparamagnetic property.

关键词： Magnetic nanoparticles Fe304 Dopamine ligand-exchange

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Generalized assembly of sandwich-like 0D/2D/0D heterostructures with highly exposed surfaces toward superior electrochemical performances

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Nano Research 2022年第1期15卷 255-263页

作者： Shuqing Xue Guanhong Wu Mingzhong Li Zihan Liu Yuwei Deng Wenqian Han Xuanyu Lv Siyu Wan Xiangyun Xi Dong Yang Angang Dong State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science Fudan UniversityShanghai 200438China Collaborative Innovation Center of Chemistry for Energy Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsDepartment of ChemistryFudan UniversityShanghai 200438China

Heterostructures composed of two-dimensional(2D)nanosheets and zero-dimensional(0D)nanoparticles(NPs)have attracted increasing attention because of the synergy arising from the coupling interactions between the two mixed-dimensional *** recent advances,it remains a challenge to fabricate 2D/0D heterostructures with clean and accessible surfaces,which is highly desirable for the diversity of catalytic,sensing,and energy storage ***,we report a generalized methodology that enables the facile assembly of sandwich-like 0D/2D/0D heterostructures with facilitated mass-transport channels and exposed surface active sites.A ligand-exchange strategy with HBF4 is employed to strip off the surface-coating ligands of colloidal NPs,rendering them positively charged and dispersible in polar *** allows subsequent electrostatic assembly of NPs with oppositely charged 2D nanosheets to afford sandwich-like 0D/2D/0D *** barely covered surfaces and the advantageous architectures of such sandwich-like 0D/2D/0D heterostructures induce the desired synergistic effect,making them particularly suitable for electrochemical energy storage and *** demonstrate this by employing MXene/NiFe_(2)O_(4) and MXene/Fe3O4 heterostructures for high-performance electrocatalytic oxygen evolution and supercapacitors,respectively.

关键词： assembly heterostructures ligand-exchange MXene oxygen evolution supercapacitor

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Preparation and ζ-potential characterization of highly dispersible phosphate—functionalized magnetite nanoparticles

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Science China(Physics,Mechanics & Astronomy) 2011年第10期54卷 1766-1770页

作者： LI XueYi TANG Yan GE GuangLu CAS Key Laboratory of Measurement and Standardization for Nanotechnology National Center for Nanoscience and Technology Beijing 100190 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

By the combination of high-temperature organometallic synthesis and phase transfer through complete ligand-exchange withmixed phosphate, highly water-dispersible Fe3O4nanoparticles with narrow size distribution are obtained, which show appli-cable response to magnetic field. IR and -potential characterization of this system provides insights into ligand structures onparticle surface.

关键词： magnetite nanoparticle ξ-potential ligand-exchange

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THE SYNTHESIS OF CROSS-LINKED POLYSTYRENE RESINS GRAFTED BY L-PROLINE THROUGH HYDROPHILIC SPACERS

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Chinese Science Bulletin 1990年第7期35卷 554-557页

作者：马建标何炳林 Institute of Polymer Chemistry Nankai University Tianjin 300071 PRC

L-proline was linked onto cross-linked polystyrene to give chiral chelating resin (1). The copper (Ⅱ) chelate of resin (1) was used as the chiral stationary phase for the chromatographic resolution of DL-amino acids. However, the hydrophobicity of polystyrene causes an amino acid to transfer slowly during chromatographic process so

关键词： chiral chelating resin ligand-exchange chromatography resolution of DL-amino acids.

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