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DOI: 10.1063/1.5040916
OpenAccess: Closed
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Oxygen mediated phase transformation in room temperature grown TiO2 thin films with enhanced photocatalytic activity

Debosmita Banerjee,A. Roy Barman,Sujit Deshmukh,C. P. Saini,G. Maity,S.K. Pradhan,Mukul Gupta,D. M. Phase,Susanta Sinha Roy,A. Kanjilal

Anatase
X-ray photoelectron spectroscopy
Materials science
2018
Room temperature transformation from anatase (A-TiO2) to rutile (R-TiO2) thin films through an intermediate mixed phase on stainless steel driven by a controlled oxygen flow rate (OFR) is investigated. Such OFR dependent phase transition is confirmed by X-ray diffraction and also consistent with X-ray absorption spectroscopy at Ti L and O K-edges, showing a long range ordering in TiO6 octahedral symmetry. X-ray photoelectron spectroscopy reveals a gradual reduction in Ti2O3 and/or TiO intermediate phases with increasing OFR. Finally, an enhanced photocatalytic activity is observed in the mixed phase and discussed in terms of photo-generated charge transport in the type-II staggered band structure between A-TiO2 and R-TiO2 phases.
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    Oxygen mediated phase transformation in room temperature grown TiO2 thin films with enhanced photocatalytic activity” is a paper by Debosmita Banerjee A. Roy Barman Sujit Deshmukh C. P. Saini G. Maity S.K. Pradhan Mukul Gupta D. M. Phase Susanta Sinha Roy A. Kanjilal published in 2018. It has an Open Access status of “closed”. You can read and download a PDF Full Text of this paper here.