期刊
CERAMICS INTERNATIONAL
卷 42, 期 8, 页码 10380-10388出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2016.03.175
关键词
Network-like; Porous; Hematite; Nanosheets; Combustion
资金
- National Natural Science Foundation Program of China [51574031]
- Program for the New Century Excellent Talents in University [NCET-10-0226]
- Fundamental Research Funds for the Central Universities [FRF-TP-11-004A]
- National 863 Program [2013AA031101]
Network-like porous hematite (alpha-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 alpha-Fe2O3 nanosheets exhibit a network-like porous structure, perforated by a large quantity of well-formed round single-pores with similar to 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. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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