Hydrothermal synthesis of ZnO whiskers from ɛ-Zn(OH)<sub>2</sub> in NaOH/Na<sub>2</sub>SO<sub>4</sub> solution_中国颗粒学会

Hydrothermal synthesis of ZnO whiskers from ɛ-Zn(OH)<sub>2</sub> in NaOH/Na<sub>2</sub>SO<sub>4</sub> solution_中国颗粒学会

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Partic. vol. 19 pp. 113-117 (April 2015)
doi: 10.1016/j.partic.2014.06.010

Hydrothermal synthesis of ZnO whiskers from ɛ-Zn(OH)₂ in NaOH/Na₂SO₄ solution

Lining Yang, Jing Wang, Lan Xiang^*

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xianglan@mail.tsinghua.edu.cn

Highlights

₂

₄

₂

₄

₄

²⁻

Abstract

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 ɛ-Zn(OH)₂ precursor in NaOH/Na₂SO₄ solution at room temperature, followed by aging of the resulting solution at 140 °C for 6 h. Fourier transform infrared spectroscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy analyses revealed that SO₄²⁻ ions were primarily adsorbed on the (1 0 0) plane of the ZnO whiskers via an outer-sphere complex configuration (Osingle bondH···O), thereby promoting the one-dimensional growth of ZnO whiskers along the c-axis.

Graphical abstract

Image for unlabelled figure

Keywords

ZnO whisker; Hydrothermal; ɛ-Zn(OH)₂; Na₂SO₄; Outer-sphere complex