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Surface photovoltage property of magnesium ferrite/hematite heterostructured hollow nanospheres prepared with one-pot strategy

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Authors
Shen, Y.
Zhao, Q.
Li, Xin Yong
Hou, Y.
Chen, G.
Date
2012
Type
Journal Article

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Shen, Y. and Zhao, Q. and Li, X.Y. and Hou, Y. and Chen, G. 2012. Surface photovoltage property of magnesium ferrite/hematite heterostructured hollow nanospheres prepared with one-pot strategy. Colloids and Surfaces A: Physicochemical and Engineering Aspects. 403: pp. 35-40.
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Colloids and Surfaces A: Physicochemical and Engineering Aspects
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Department of Chemical Engineering
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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 MgFe 2O 4/a-Fe 2O 3 hollow nanospheres, an optical band-gap energy of about 1.986eV 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 MgFe 2O 4 and a-Fe 2O 3. © 2012 Elsevier B.V.