Abstract
Hematite (α-Fe 2 O 3 ), magnetite (Fe 3 O 4 ), and maghemite (γ-Fe 2 O 3 ) micropine dendrites were synthesized by a facile hydrothermal method and oxidation-reduction process. The samples have been thoroughly characterized by various physicochemical techniques. The adsorption ability, quantum efficiency, and the photo-induced charge separation of the electron-hole pair in the samples were demonstrated by the XPS, FTIR, UV-vis, and PL spectroscopy. The α-Fe 2 O 3 showed higher catalytic activity than the other two samples for photocatalytic oxidation of gaseous toluene. This may be attributed to the phase transformation-induced crystal plane effect of the α-Fe 2 O 3 micropine dendrite, which has relatively more reactive crystal planes {0 0 1} and {1 1 0} exposed on the surface of α-Fe 2 O 3 .
| Original language | English |
|---|---|
| Pages (from-to) | 398-404 |
| Number of pages | 7 |
| Journal | Applied Surface Science |
| Volume | 288 |
| DOIs | |
| State | Published - 1 Jan 2014 |
Keywords
- Crystal plane effect
- Gaseous toluene
- Iron oxide
- Phase transformation
- Photocatalytic oxidation
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