Fabrication and surface photovoltage study of hematite microparticles with hollow spindle-shaped structure

Hong Li, Qidong Zhao, Xinyong Li, Yong Shi, Guohua Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

10 Citations (Scopus)

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 languageEnglish
Pages (from-to)7099-7104
Number of pages6
JournalApplied Surface Science
Volume258
Issue number18
DOIs
Publication statusPublished - 1 Jul 2012
Externally publishedYes

Keywords

  • α-Fe O microparticles 2 3
  • Hollow structure
  • Optical properties
  • Surface photovoltage

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

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