کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1402203 1501738 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structure and optical properties of ZnO produced from microwave hydrothermal hydrolysis of tris(ethylenediamine)zinc nitrate complex
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Structure and optical properties of ZnO produced from microwave hydrothermal hydrolysis of tris(ethylenediamine)zinc nitrate complex
چکیده انگلیسی


• ZnO could be rapidly synthesis by microwave hydrothermal hydrolysis of [Zn(en)3](NO3)2 complex.
• The morphology of ZnO could be controlled by changing the pH.
• Flower-like ZnO morphology prepared at pH = 10 and 12.
• Rod-like ZnO morphology prepared at pH = 7.
• The band gap and optical properties of ZnO was found to be dependent on its morphology.

ZnO powders were synthesized using a solution microwave hydrothermal hydrolysis process and tris(ethylenediamine)zinc nitrate {[Zn(en)3](NO3)2} (en = ethylenediamine) as a precursor. Hydrolysis of the precursor complex at different pH produced zinc oxide with a diversity of well-defined morphologies. The effect of hydrolysis pH values on the structural and optical properties has been explored using XRD, SEM, and UV–visible diffuse reflectance spectroscopy (DRS). At pH = 7.0, randomly dispersed rods were formed. Whereas flower-like morphologies were obtained by treating the complex precursor in water at pH = 10.0 and 12.0. The ZnO4 tetrahedrons are greatly affected by the pH value. The band gap decreased sharply with increasing the pH value from 7.0 to 10.0, then slightly decreased with further increasing the pH to 12.0. The relationship between band gap and both structure and surface defects of the samples is also discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Structure - Volume 1079, 5 January 2015, Pages 480–485
نویسندگان
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