Electrosynthesis of ZnO nanomaterials in aqueous medium with CTAB cationic stabilizer
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ZnO nanoparticles were prepared with a green, cheap, and easy aqueous electrochemical process. The electrolyte was made of a stabilizing cationic surfactant (cetyltrimethylammonium bromide, CTAB) dissolved in NaHCO3 at pH = 8. The electrosynthesis was carried out galvanostatically at 10 mA/cm2, at room temperature or at 80 °C for 1 h. Gel-like pristine colloids, made of mixed Zn carbonates and hydroxides, underwent post-synthesis thermal treatments to allow a compete conversion to ZnO. Calcination was carried out at 300 or 600 °C for 1 h. All nanomaterials were characterized at each step of their production by transmission electron microscopy, UV–Vis, infrared (FT–IR) and X-ray photoelectron spectroscopies. Electrochemical synthesis at 80 °C followed by calcination at 300 °C for 1 h allowed preparing ZnO submicron structures with good morphology and stoichiometry.
KeywordsZinc oxide nanostructures Electrochemical synthesis Aqueous medium Cationic stabilizer
Financial support from Italian Ministry of University and Research (MIUR) for Grant number PON03PE_00004_1 (PON MAIND) is gratefully acknowledged.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no competing interests.
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