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

被引：8

作者：

Banerjee, D. ^{[1
]}

Barman, A. ^{[1
]}

Deshmukh, S. ^{[1
]}

Saini, C. P. ^{[1
,2
]}

Maity, G. ^{[3
]}

Pradhan, S. K. ^{[3
]}

Gupta, M. ^{[4
]}

Phase, D. M. ^{[4
]}

Roy, S. S. ^{[1
]}

Kanjilal, A. ^{[1
]}

机构：

[1] Shiv Nadar Univ, Sch Nat Sci, Dept Phys, NH-91, Gautam Buddha Nagar 201314, Uttar Pradesh, India

[2] Interuniv Accelerator Ctr, Aruna Asaf Ali Marg, New Delhi 110067, India

[3] Univ Burdwan, Dept Phys, Burdwan 713104, W Bengal, India

[4] UGC DAE Consortium Sci Res, Khandwa Rd, Indore 452001, Madhya Pradesh, India

来源：

APPLIED PHYSICS LETTERS | 2018年 / 113卷 / 08期

关键词：

X-RAY-ABSORPTION; MIXED-PHASE; RUTILE; ANATASE; POWDER;

D O I：

10.1063/1.5040916

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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. Published by AIP Publishing.

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页数：5

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