Huanping Yang

Publications (4)10.95 Total impact

• Source

  Available from: PubMed Central

  Article: Influences of graphene oxide support on the electrochemical performances of graphene oxide-MnO2 nanocomposites.

  Huanping Yang, Jian Jiang, Weiwei Zhou, Linfei Lai, Lifei Xi, Yeng Ming Lam, Zexiang Shen, Bahareh Khezri, Ting Yu
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  ABSTRACT: ABSTRACT: MnO2 supported on graphene oxide (GO) made from different graphite materials has been synthesized and further investigated as electrode materials for supercapacitors. The structure and morphology of MnO2-GO nanocomposites are characterized by X-ray diffraction, X-ray photoemission spectroscopy, scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, and Nitrogen adsorption-desorption. As demonstrated, the GO fabricated from commercial expanded graphite (denoted as GO(1)) possesses more functional groups and larger interplane gap compared to the GO from commercial graphite powder (denoted as GO(2)). The surface area and functionalities of GO have significant effects on the morphology and electrochemical activity of MnO2, which lead to the fact that the loading amount of MnO2 on GO(1) is much higher than that on GO(2). Elemental analysis performed via inductively coupled plasma optical emission spectroscopy confirmed higher amounts of MnO2 loading on GO(1). As the electrode of supercapacitor, MnO2-GO(1) nanocomposites show larger capacitance (307.7 F g-1) and better electrochemical activity than MnO2-GO(2) possibly due to the high loading, good uniformity, and homogeneous distribution of MnO2 on GO(1) support.
  Nanoscale Research Letters 09/2011; 6:531. · 2.73 Impact Factor
• Article: Fabrication of Co3O4-reduced graphene oxide scrolls for high-performance supercapacitor electrodes.

  Weiwei Zhou, Jinping Liu, Tao Chen, Kim Seng Tan, Xingtao Jia, Zhiqiang Luo, Chunxiao Cong, Huanping Yang, Chang Ming Li, Ting Yu
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  ABSTRACT: A new type of scrolled structure of Co(3)O(4)/reduced graphene oxide (r-GO) is facilely prepared through a two-step surfactant-assisted method. This assembly enables almost every single Co(3)O(4) scroll to connect with the r-GO platelets, thus leading to remarkable electrochemical performances in terms of high specific capacitance and good rate capability.
  Physical Chemistry Chemical Physics 08/2011; 13(32):14462-5. · 3.57 Impact Factor
• Article: Tip‐enhanced Raman spectroscopy using single‐crystalline Ag nanowire as tip

  Yumeng You, N. A. Purnawirman, Hailong Hu, Johnson Kasim, Huanping Yang, Chaoling Du, Ting Yu, Zexiang Shen
  Journal of Raman Spectroscopy 01/2010; 41(10):1156 - 1162. · 3.09 Impact Factor
• Article: Metal hydroxide and metal oxide nanostructures from metal corrosion.

  Huanping Yang, Yun Ma, Zhenhua Ni, Zexiang Shen, Yuanping Feng, Ting Yu
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  ABSTRACT: Unique metal hydroxide (Co(OH)2 and Mg(OH)2) and metal oxide (Co3O4 and MgO) nanosheet arrays have been successfully achieved on a large scale by simple metal corrosion process in deionized water at room temperature. The X-ray diffraction (XRD) and micro-Raman scattering investigations reveal the crystalline feature of the resulted nanosheets. The magnesium based nanosheet exhibits strong visible photoluminescence (PL) emission. The water wettability of cobalt based nanosheet has also been studied.
  Journal of Nanoscience and Nanotechnology 03/2009; 9(2):1496-500. · 1.56 Impact Factor