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Author Kang, Xinyuan ♦ Wu, Zhiping ♦ Liao, Fang ♦ Zhang, Tingting ♦ Guo, Tingting
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY ♦ AQUEOUS SOLUTIONS ♦ CALCINATION ♦ CARBON ♦ CARBON DIOXIDE ♦ CARBONIZATION ♦ FERRITES ♦ GLUCOSE ♦ HYDROGEN PEROXIDE ♦ HYDROTHERMAL SYNTHESIS ♦ HYDROXIDES ♦ IRON IONS ♦ IRON NITRATES ♦ IRON OXIDES ♦ IRRADIATION ♦ OXYGEN ♦ REACTIVITY ♦ REDUCTION ♦ SILVER ♦ SURFACES ♦ TEMPERATURE DEPENDENCE
Abstract In this paper, we demonstrated a simple approach for preparing α-Fe{sub 2}O{sub 3} hollow spheres by mixing ferric nitrate aqueous and glucose in 180 °C. The glucose was found to act as a soft template in the process of α-Fe{sub 2}O{sub 3} hollow spheres formation. Ag/α-Fe{sub 2}O{sub 3} hollow nanocomposite was obtained under UV irradiation without additional reducing agents or initiators. Synthesized Ag/α-Fe{sub 2}O{sub 3} hollow composites exhibited remarkable catalytic performance toward H{sub 2}O{sub 2} reduction. The electrocatalytic activity mechanism of Ag/α-Fe{sub 2}O{sub 3}/GCE were discussed toward the reduction of H{sub 2}O{sub 2} in this paper. - Graphical abstract: Glucose is carbonized as carbon balls in the 180 °C hydrothermal carbonization process, which plays a role of a soft template. Carbon spherical shell is rich in many hydroxyls, which have good hydrophilicity and surface reactivity. When Fe(NO{sub 3}){sub 3} is added to the aqueous solution of Glucose, the hydrophilic -OH will adsorb Fe{sup 3+} to form coordination compound by coordination bond. α-FeOOH is formed on the surface of carbon balls by hydrothermal reaction. After calcination at 500 °C, carbon spheres react with oxygen to form carbon dioxide, which disappears in the air. Meanwhile α-FeOOH is calcined to form α-Fe{sub 2}O{sub 3} hollow spheres.
ISSN 00224596
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-09-15
Publisher Place United States
Journal Journal of Solid State Chemistry
Volume Number 229


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