The influence of Na_2SO_4 on the formation of ZnO whiskers was investigated in this paper.ZnO whiskers with aspect ratios of up to 50 were synthesized by dissolving ε-Zn(OH)_2 precursor in NaOH/Na_2SO_4 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 SO_4^(2-) 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.
