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Iron-Manganese-Titanium (1:1:2) Oxide Composite Thin Films for Improved Photocurrent Efficiency

Abstract

In continuation of our previous studies on photoelectrochemical (PEC) properties of titanium based composite oxide thin films, an effort is made to develop thin films of 1:1:2 iron-manganese-titanium oxide composite, Fe2MnTi3O10-MnTiO3, using Fe(OAc)2 and a bimetallic manganese- titanium complex, [Mn2Ti4(TFA)8(THF)6(OH)4(O)2].0.4THF (1), where OAc = acetato, TFA = trifluoroacetato and THF = tetrahydrofuran, via aerosol-assisted chemical vapour deposition (AACVD) technique. The thin films after their proper characterization with X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), MÓ§ssbauer spectroscopy, field emission scanning electron microscopy (FESEM), atomic force microscopy (AFM), energy dispersive X-ray (EDX) spectroscopy, UV-Vis spectrophotometery and photoluminescence (PL) spectroscopy, were tested for their potential applications for the photoelectrochemical oxidation of water. The PEC results revealed that the photocurrent density (Jlight) of 1.88 mA.cm-2 is obtained at low potential of 0.20 V vs Ag/AgCl/3MKCl inferring promising photo-conversion efficiency of 1.56%. These observations have been further endorsed by electrochemical impedance spectroscopic (EIS) studies in terms of charge transportation and its recombination time. Further Mott-Schottky plot indicates flat band potential of - 1.0 V vs Ag/AgCl.

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Publication details

The article was received on 14 Feb 2017, accepted on 12 Jun 2017 and first published on 12 Jun 2017


Article type: Paper
DOI: 10.1039/C7NJ00513J
Citation: New J. Chem., 2017, Accepted Manuscript
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    Iron-Manganese-Titanium (1:1:2) Oxide Composite Thin Films for Improved Photocurrent Efficiency

    M. A. Mansoor, K. Munawar, S. P. Lim, M. N. Huang, M. Mazhar, M. J. Akhtar and M. Siddique, New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ00513J

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