Microwave-Assisted Hydrothermal Synthesis of Nanosized 伪-Fe2O3 for Catalysts and Adsorbents

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• 作者：Guohong Qiu ; Hui Huang ; Homer Genuino ; Naftali Opembe ; Lisa Stafford ; Saminda Dharmarathna ; Steven L. Suib
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：October 13, 2011
• 年：2011
• 卷：115
• 期：40
• 页码：19626-19631
• 全文大小：900K
• 年卷期：v.115,no.40(October 13, 2011)
• ISSN：1932-7455

文摘

Nanosized 伪-Fe₂O₃ powder was synthesized by a microwave-assisted hydrothermal reaction of Fe(NO₃)₃ and urea at 120 掳C for 30 min. The products were characterized by X-ray diffraction, transmission electron microscopy, BET measurements, Fourier transform infrared spectroscopy, and thermogravimetric analysis. The catalytic performance of 伪-Fe₂O₃ was studied for the oxidation of CO and 2-propanol to CO₂, and the adsorption properties were investigated for the removal of As(III) in water treatment. Uniform 伪-Fe₂O₃ particles about 5.0 nm in diameter were formed with a surface area of around 173.0 m² g^鈥?. When 0.1 g of 伪-Fe₂O₃ powder worked as a catalyst, CO was oxidized to CO₂ over 120 掳C and completely transformed to CO₂ at 170 掳C, and 2-propanol was fully oxidized to CO₂ at 350 掳C. The adsorption capacity for As(III) reached 51.8 mg g^鈥? at room temperature. This work facilitates the preparation of nanosized 伪-Fe₂O₃ materials with excellent catalytic and adsorption performance.