American Journal of Physical Chemistry

Volume 3, Issue 4, August 2014

  • Effect of an External Applied Potential on the Photocatalytic Properties of Manganese-Doped Titanium Dioxide

    Gracien Bakambo Ekoko, Joseph Kanza-Kanza Lobo, Omer Muamba Mvele, Jérémie Lunguya Muswema, Jean-Félix Senga Yamambe

    Issue: Volume 3, Issue 4, August 2014
    Pages: 41-46
    Received: Aug. 14, 2014
    Accepted: Aug. 19, 2014
    Published: Aug. 30, 2014
    Abstract: The electrochemical anodic oxidation method was used to prepare thin films of titanium dioxide (TiO2) semiconductors (undoped and doped with Mn). These films were used to test the oxidation of methanol (CH3OH), the degree of which was quantified by measuring the current density produced as a function of an applied potential between 0.5 V and 5.0 V.... Show More
  • First-Principles Calculations of the Formation and Structures of Point Defects on GaN (0001) Surface

    Chun Yang, Weiwei Jie, Ping Huang, Xiaoqing Liang, Xiaoxiao Pan

    Issue: Volume 3, Issue 4, August 2014
    Pages: 47-53
    Received: Aug. 29, 2014
    Accepted: Sep. 18, 2014
    Published: Sep. 30, 2014
    Abstract: We studied the structures and energies associated with 8 types of point defects on the [0001] surface of hexagonal gallium nitride (GaN) by modeling: (1) Ga vacancies (VGa), (2) N vacancies (VN), (3) substitution of N by Ga (GaN), (4) substitution of Ga by N (NGa), (5) Ga octahedral interstitial defects (GaO), (6) Ga tetrahedral interstitial defect... Show More