Microwave-assisted sol–gel synthesis of Fe_2.9O₄/ZnO core/shell nanoparticles using ethylene glycol and its use in photocatalytic degradation of 2-nitrophenol

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• 作者：Navid Assi ; Mohammad Saber Tehrani…
• 关键词：Core/shell ; Microwave ; Sol–gel ; Kinetics ; Fe2.9O4/ZnO
• 刊名：Journal of the Iranian Chemical Society
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：14
• 期：1
• 页码：221-232
• 全文大小：
• 刊物主题：Analytical Chemistry; Inorganic Chemistry; Physical Chemistry; Biochemistry, general; Organic Chemistry;
• 出版者：Springer Berlin Heidelberg
• ISSN：1735-2428
• 卷排序：14

文摘

Novel Fe_2.9O₄/ZnO core/shell nanoparticles have been synthesized by a microwave-assisted sol–gel method using ethylene glycol. Phase purity was confirmed by X-ray diffraction, and it was observed that when diethanolamine and zinc acetate dihydrate were added to Fe₂O₃, it has undergone a reduction reaction and converted to Fe_2.9O₄. Characterization of nanoparticles was evaluated, and the formation of magnetic core/Shell structure was estimated by transition electron microscopy and elemental mapping. The band gap energy of Fe_2.9O₄/ZnO core/shell nanoparticles was measured to be 3.33 eV by UV–Vis spectroscopy. The photocatalytic property of Fe_2.9O₄/ZnO core/shell nanoparticles was evaluated on 2-nitrophenol in aqueous solution under UV-C irradiation. The effect of the initial 2-nitrophenol concentration, amount of photocatalyst, and pH were investigated during photodegradation. Kinetics of the 2-nitrophenol photocatalytic degradation was studied, and experimental data fitted in the pseudo-first-order kinetic and Langmuir–Hinshelwood models. The values for k_L–H and K_ads were 5.0403 mg L−1 min−1 and 0.1984 L mg−1, respectively.