Hydrothermal synthesis of ZnO whiskers from ε-Zn（OH）2 in NaOHJNa2SO4 solution

The influence of Na2SO4 on the formation of ZnO whiskers was investigated in this paper.ZnO whiskers with aspect ratios of up to 50 were synthesized by dissolving e-Zn（OH）2 precursor in NaOH/Na2SO4 solution at room temperature,followed by aging of the resulting solution at 140℃ for 6 h.Fourier transform infrared spectroscopy,Raman spectroscopy,and X-ray photoelectron spectroscopy analyses revealed that SO42- ions were primarily adsorbed on the（100） plane of the ZnO whiskers via an outer-sphere complex configuration（O-H…O）,thereby promoting the one-dimensional growth of ZnO whiskers along the c-axis.