Hierarchial Mesoporous Hematite with "Electron-Transport Channels" and Its Improved Performances in Photocatalysis and Lithium Ion Batteries

作者：Zhou Wei; Lin Lijuan; Wang Weijie; Zhang Linlin; Wu Qiong; Li Jinghong^*; Guo Lin

来源：Journal of Physical Chemistry C, 2011, 115(14): 7126-7133.

DOI：10.1021/jp2011606

Hierarchical mesoporous hematite (alpha-Fe(2)O(3)) assembled by porous nanoplates has been synthesized by heating the iron oxyhydroxide (FeOOH) precursor. The plates of the hematite, 100-300 nm in width, 500 nm in length, were composed of single crystal long particles with an average diameter of 15 nm. High-resolution transmission electron microscopy results show that these particles have grown or linked together, forming netlike substructures (like "electron-transport channels"). The fabricated hematite has a high specific surface area similar to 116 m(2)/g with an average pore size of 7.85 nm. The photocatalytic and electrochemical properties of the sample were investigated, showing improved performances because of the high specific surface area, rich mesopores, and electron-transport channels of the as-prepared spatial structure. The designed hierarchical mesoporous structure shows potential applications in photocatalysis and lithium ion batteries.

• 出版日期2011-4-14
• 单位北京航空航天大学; 清华大学