Oxygen mediated phase transformation in room temperature grown TiO2 thin films with enhanced photocatalytic activity

• DOI: 10.1063/1.5040916
• Publication Date: 2018-08-22T17:38:02Z
• Authors: D. Banerjee; A. Barman; S. Deshmukh; C. P. Saini; G. Maity; S. K. Pradhan; M. Gupta; D. M. Phase; S. S. Roy; A. Kanjilal
• Keywords: Rutile; Atmospheric temperature range

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 transition confirmed X-ray diffraction and also consistent with absorption spectroscopy at Ti L O K-edges, showing long range ordering in TiO6 octahedral symmetry. photoelectron reveals gradual reduction Ti2O3 and/or TiO phases increasing OFR. Finally, enhanced photocatalytic activity observed the discussed terms of photo-generated charge transport type-II staggered band structure between A-TiO2 R-TiO2 phases.