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Li Z.C.,Jiangsu Teachers University of Technology | Li Z.C.,Jiangsu Key Laboratory of Precious Metals Chemistry and Engineering | Chen S.S.,Jiangsu Teachers University of Technology | Gu A.J.,Jiangsu Teachers University of Technology | And 2 more authors.
Micro and Nano Letters | Year: 2012

Hollow urchin-like α-FeOOH was successfully prepared without template or surfactant, employing a facile route incorporating hydrothermal treatment with ammonium iron (III) sulphate solution. α-FeOOH was characterised by X-ray diffraction, thermal gravimetric analysis, scanning electron microscopy, transmission electron microscopy (TEM), high-resolution TEM (HRTEM) and Fourier transform infrared spectroscopy. The Ostwald ripening process was believed to be the main driving force for the formation of hollow urchin-like architectures. Furthermore, the electrochemical properties of hollow urchin-like α-FeOOH were investigated by cyclic voltammetry (CV) and galvanostatic charge-discharge measurements. The CV results implied that the capacitance was mainly associated with the redox mechanism. The specific capacitance value was 88.5F/g calculated from the discharge curve at the current density of 0.5A·g. The hollow urchin-like α-FeOOH shows a good electrochemical performance. © 2012 The Institution of Engineering and Technology. Source


Li Z.,Jiangsu Key Laboratory of Precious Metals Chemistry and Engineering | Li Z.,Jiangsu University | Gu A.,Jiangsu University | Zhou Q.,Jiangsu Key Laboratory of Precious Metals Chemistry and Engineering | Zhou Q.,Jiangsu University
Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering | Year: 2016

Single crystal manganese oxyhydroxide (MnOOH) nanorods were prepared under the condition of no extra template or surfactant by a simple hydrothermal route using potassium permanganate (KMnO4) as Mn source, water and N-methyl pyrrolidone (NMP) as mixed solvent. By adjusting the reaction temperature, reaction time and the volume ratio of H2O/NMP, MnOOH nanorods with lengths up to 20 μm and square cross-sections of edge lengths in the range of 50~400 nm were be facilely prepared. The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM) and Fourier transformed infrared spectroscopy (FTIR). The formation mechanism of MnOOH nanorods was preliminarily discussed based on the Ostwald's ripening process. Furthermore, Mn2O3 nanorods were obtained by calcination of MnOOH nanorods. Results show that the morphologies of MnOOH nanorods and Mn2O3 nanorods are almost the same. Copyright © 2016, Northwest Institute for Nonferrous Metal Research. Published by Elsevier BV. All rights reserved. Source


Li Z.,Jiangsu Key Laboratory of Precious Metals Chemistry and Engineering | Li Z.,Jiangsu Teachers University of Technology | Liu Y.,Jiangsu Teachers University of Technology | Shang T.,Jiangsu Key Laboratory of Precious Metals Chemistry and Engineering | And 3 more authors.
Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering | Year: 2011

Gold nanoparticles were prepared in PEG10000/Vc/HAuCl4 system with Vc as the reducing agent. Then gold-platinum bimetallic nanoparticles with different Pt/Au ratio were formed using a simple gold seed-mediated growth method by controlling the mass ratio of HAuCl4/H2PtCl6. Their electrocatalysis effects on H2O2 electrochemical oxidation were studied. Results of Uv-visible spectra (Uv-vis), transmission electronic microscopy (TEM), X-ray diffraction (XRD) and selected area electron diffraction (SAED) show that Au-Pt bimetallic nanoparticles are of face-centered cubic structure. The electrochemical performance of Au-Pt/glassy carbon (GC) electrode was investigated by cyclic voltammetry method. The result indicates that the Au-Pt/GC electrode has good electrocatalytic activity for H2O2oxidation. The catalytic efficiency is increased with more Pt content in Au-Pt alloys. Source


Li Z.C.,Jiangsu Key Laboratory of Precious Metals Chemistry and Engineering | Li Z.C.,Jiangsu Teachers University of Technology | Zhou Q.F.,Jiangsu Key Laboratory of Precious Metals Chemistry and Engineering | Zhou Q.F.,Jiangsu Teachers University of Technology | Sun J.H.,Jiangsu Key Laboratory of Precious Metals Chemistry and Engineering
Micro and Nano Letters | Year: 2010

Monodisperse silver nanospheres have been synthesised in high yield by a developed polyol process, in which silver nitrate (AgNO3) was reduced by ethylene glycol (EG) with the assistance of polyvinyl pyrrolidone (PVP) and potassium iodide (KI). Both the KI concentration and reaction temperature are crucial for the morphologies and diameter distribution of silver nanostructures. Transmission electron microscopy and X-ray diffraction have been employed to characterise silver nanoparticles. The role of KI for the formation of monodisperse silver nanospheres has been discussed by taking into account the formation of silver iodide (AgI) as seeds. © 2010 The Institution of Engineering and Technology. Source


Li Z.C.,Jiangsu Key Laboratory of Precious Metals Chemistry and Engineering | Li Z.C.,Jiangsu Teachers University of Technology | Zhou Q.F.,Jiangsu Key Laboratory of Precious Metals Chemistry and Engineering | Zhou Q.F.,Jiangsu Teachers University of Technology | And 3 more authors.
Micro and Nano Letters | Year: 2011

Silver nanocubes and nanorods were prepared with the assistance of sodium bromide (NaBr) through a developed polyol route. The addition of different amounts of NaBr could tune morphologies of silver nanostructures. Transmission electron microscopy, high-resolution transmission electron microscopy, selected areas electron diffraction and X-ray diffraction were employed to characterise silver nanocubes and nanorods. The growth mechanisms of silver nanocubes and nanorods were discussed by taking account of the formation of single crystal and multiply twinned seeds, respectively. © 2011 The Institution of Engineering and Technology. Source

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