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Nucleation and Growth of Bismuth Electrodeposition from Alkaline Electrolyte
Zhou, Longping,Dai, Yatang,Zhang, Huan,Jia, Yurong,Zhang, Jie,Li, Changxiong Korean Chemical Society 2012 Bulletin of the Korean Chemical Society Vol.33 No.5
The early stages of bismuth (Bi) electrodeposition on glass carbon electrode from alkaline electrolyte were studied by cyclic voltammetry, chronoamperometry, scanning electron microscopy, atomic force microscopy and X-ray diffraction. The CV analysis showed that the electrodeposition of Bi was determined to be quasireversible process with diffusion controlled. The current transients for Bi electrodeposition were analyzed according to the Scharifker-Hills model and the Heerman-Tarallo model. It can be concluded that the nucleation and growth mechanism was carried out under a 3D instantaneous nucleation, which was confirmed by SEM analysis. The kinetic growth parameters were obtained through a nonlinear fitting. In addition, the Bi film obtaining at -0.86 V for 1 hour was of compact and uniform surface with good smoothness, small roughness and a very high purity. The Bi film were indexed to rhombohedral crystal structure with preferred orientation of (0 1 2) planes to growth.
Nucleation and Growth of Bismuth Electrodeposition from Alkaline Electrolyte
Longping Zhou,Yatang Dai,Huan Zhang,Yurong Jia,Jie Zhang,Changxiong Li 대한화학회 2012 Bulletin of the Korean Chemical Society Vol.33 No.5
The early stages of bismuth (Bi) electrodeposition on glass carbon electrode from alkaline electrolyte were studied by cyclic voltammetry, chronoamperometry, scanning electron microscopy, atomic force microscopy and X-ray diffraction. The CV analysis showed that the electrodeposition of Bi was determined to be quasireversible process with diffusion controlled. The current transients for Bi electrodeposition were analyzed according to the Scharifker-Hills model and the Heerman-Tarallo model. It can be concluded that the nucleation and growth mechanism was carried out under a 3D instantaneous nucleation, which was confirmed by SEM analysis. The kinetic growth parameters were obtained through a nonlinear fitting. In addition, the Bi film obtaining at −0.86 V for 1 hour was of compact and uniform surface with good smoothness, small roughness and a very high purity. The Bi film were indexed to rhombohedral crystal structure with preferred orientation of (0 1 2) planes to growth.
Wei Wang,Mingyi He,Huan Zhang,Yatang Dai 한국자기학회 2016 Journal of Magnetics Vol.21 No.2
In this paper, 10 nm Fe₃O₄ nanoparticles were modified on the surface of 2 μm flower-like bismuth oxychloride (BiOCl) spheres by a facile co-precipitation method. The results showed that the Fe₃O₄/BiOCl nanocomposites exhibited excellent photocatalytic activity and superparamagnetic property (Ms = 3.22 emu/g) under visible light for Rhodamine B (RhB) degradation. Moreover, the Fe₃O₄-BiOCl photocatalyst possessed magnetic recyclable property, which could maintain high photocatalytic effective even after 20 cycle times. These characteristic indicates a promising application for wastewater treatment.