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Indexed by:期刊论文

Date of Publication:2012-06-05

Journal:COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS

Included Journals:SCIE、EI

Volume:403

Page Number:35-40

ISSN No.:0927-7757

Key Words:Surface photovoltage property; Solvothermal synthesis; Magnesium ferrite/hematite; Hollow nanosphere

Abstract:Magnesium ferrite/hematite heterostructured hollow nanospheres were successfully fabricated via a facile solvothermal method. The products were well characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, high resolution transmission electron microscopy, Fourier transform infrared spectroscopy. UV-vis absorption spectroscopy and surface photovoltage spectroscopy. From the absorption edge in the UV-vis absorption spectrum of MgFe2O4/alpha-Fe2O3 hollow nanospheres, an optical band-gap energy of about 1.986 eV was estimated. Furthermore, it was observed that the heterostructured hollow nanospheres presented a remarkable surface photovoltage response in UV and visible spectral region, which was attributed to the effective formation of chemical interface between the two crystalline phases of MgFe2O4 and alpha-Fe2O3. (C) 2012 Elsevier B.V. All rights reserved.