Facile preparation of network-like porous hematite (α-Fe₂O₃) nanosheets via a novel combustion-based route

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• 作者：Min Huang ; Mingli Qin ; ^{qinml@mater.ustb.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Pengqi Chen ; Baorui Jia ; Zheng Chen ; Rui Li ; Zhiwei Liu ; Xuanhui Qu
• 关键词：Network-like ; Porous ; Hematite ; Nanosheets ; Combustion
• 刊名：Ceramics International
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：42
• 期：8
• 页码：10380-10388
• 全文大小：6218 K

文摘

Network-like porous hematite (ɑ-Fe₂O₃) nanosheets have been successfully prepared by a facile and novel combustion-based route with three simple steps. First, a sheet-like precursor with uniformly mixed amorphous iron oxide and carbon was fabricated via combustion synthesis derived from a homogeneous solution containing ferric nitrate, glycine and glucose. Subsequently, ultrasmall intermediate Fe₃C nanoparticles were formed and evenly embedded into the sheet-like carbon support through calcination of the precursor in argon. Finally, the decarbonization and pore formation were carried out by heat-treating the calcined product in air. The as-prepared ɑ-Fe₂O₃ nanosheets exhibit a network-like porous structure, perforated by a large quantity of well-formed round single-pores with ~40 nm in diameter as well as a small quantity of through-pores. A possible formation mechanism for the network-like porous nanosheets has been proposed. Such unique network-like porous structure makes this low-cost material a highly promising candidate for potential applications in energy conversion and storage, water treatment, gas sensors, etc.