Abstract
Hematite (α-Fe2O3) particles with hollow spindle-shaped microstructure were successfully synthesized by a one-pot hydrothermal approach in large scale. The structural properties of the sample were systematically investigated by X-ray powder diffraction, scanning electron microscopy, energy-dispersive X-ray spectrum, high resolution transmission electron microscopy, selected-area electron diffraction techniques, UV-vis diffuse reflectance spectroscopy and infrared spectroscopy techniques. The characterization results revealed that the α-Fe2O3microparticles with a single-domain crystalline structure was mainly grown along the (1 0 4) crystal plane. The valence states and the surface chemical compositions of α-Fe2O3were further identified by X-ray photoelectron spectroscopy. The feature of photo-induced charge separation on spectrum was demonstrated by the surface photovoltage measurement under different external biases. The observed photoelectric characteristics of the as-fabricated material are beneficial for various optical and electronic applications.
| Original language | English |
|---|---|
| Pages (from-to) | 7099-7104 |
| Number of pages | 6 |
| Journal | Applied Surface Science |
| Volume | 258 |
| Issue number | 18 |
| DOIs | |
| Publication status | Published - 1 Jul 2012 |
| Externally published | Yes |
Keywords
- α-Fe O microparticles 2 3
- Hollow structure
- Optical properties
- Surface photovoltage
ASJC Scopus subject areas
- Surfaces, Coatings and Films