Thermally Stable Hematite Hollow Nanowires

Abstract

Thermally stable hematite (alpha-Fe(2)O(3)) hollow nanowires were synthesized by a vacuum-pyrolysis route from beta-FeOOH nanowires for the first time. The products can catalyze the oxidation of almost 100% carbon monoxide at 320 degrees C, exhibiting excellent catalytic performances despite their small BET surface area.

Synthesis and properties of α‐Fe2O3 nanorods

“…The hematite (α -Fe 2 O 3 ) with band gap of 2.2 eV is a very attractive material due to their wide application in catalysis, gas sensor, magnetic recording materials, pigments and paints [10][11][12][13][14][15][16]. Various 1D hematite nanostructures have been synthesized by several physical and chemical methods such as template synthesis method [17], vacuumpyrolysis [18], methods employing polycrystals or single crystals as a growth substrate [19], vapor-solid growth technique [20,21], sol-gel process [22], hydrothermal method [23] and microemulsion method [24]. The physical methods always need expensive equipment and complex procedures, which restrict further development in actual applications.…”

Facile synthesis of ellipsoidal hematite nanostructures via an EDA-assisted solvothermal method

“…Up to now, some a-Fe 2 O 3 nanostructures including rods, wires, tubes, rings, cubes, and complex superstructures [5][6][7][8][9][10][11][12][13][14], have been prepared via vapor-phase methods (physical and chemical processes), template methods (''soft'' or ''hard'' template), thermal decomposition of organometallic compounds, and a series of wet chemical methods (including coprecipitation, sol-gel, solvothermal/hydrothermal process, and so on). Generally, expensive equipments and high temperature are required for vapor-phase route, and sometimes toxic metal-organic compounds and catalysts are involved.…”

Total oxidation of lean propane over α-Fe2O3 using microwaves as an energy source

“…Hematite was chosen as a catalyst because among iron oxides, it is the most stable under ambient conditions and the most environmentally friendly [14]. The catalyst was prepared by a ''green'' hydrothermal approach using microwave heating and amorphous iron hydroxide, treated in the neutral solution without any alkali or organic additives, as a single precursor.…”