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Citation: XU Yongji, ZHANG Li, ZHAO Xueping. Synthesis of ZnO Nano Flake at Room Temperature and the Stability of Colloidal Precursors[J]. Chinese Journal of Applied Chemistry, ;2012, 29(9): 1036-1040. doi: 10.3724/SP.J.1095.2012.00477 shu

Synthesis of ZnO Nano Flake at Room Temperature and the Stability of Colloidal Precursors

1.
College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China

Corresponding author: XU Yongji,
Received Date: 26 October 2011
Available Online: 5 January 2012

Colloidal precursors were synthesized by precipitation method using zinc acetate(ZnAc₂) and sodium hydroxide(NaOH) aqueous solution at room temperature.The products of Zn₅(OH)₈(Ac)₂·2H₂O and ZnO were prepared by controlling the pH values of the reaction system.The composition,structure,and morphology of the resultant soild were characterized by using X-ray diffraction,scanning electron microscopy and energy dispersive spectrometer.We found that when the pH value of the precursor solution was 7,a steady colloid could be synthesized by the precipitation method,and the composition of the product was Zn₅(OH)₈(Ac)₂·2H₂O after dried at room temperature.If the pH value was 14,the coagulation phenomenon occurred with the ageing of colloidal precursor,and the coagulation product was hexagonal flake ZnO.In addition,the growth mechanism of ZnO nanomaterials was discussed,and it was also considered from the effects of pH value on the stability of colloidal precursor.
- ZnO,
- room temperature,
- colloidal precursor,
- stability,
- flake nanomaterial,
- pH
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