Laser-induced crystalline phase transition from rutile to anatase of niobium doped TiO2

다국어 초록 (Multilingual Abstract)

The investigation of the laser-induced crystalline phase transition of niobium doped TiO2 single crystal is discussed in this paper. The TiO2 single crystal was studied by using Raman spectroscopy and electron backscatter diffraction before and after irradiation by 266 nm ns laser at the threshold intensity of 56 MW/cm2. Experimental results show an evidence of anatase phase formation from rutile single crystal. Moreover, the analysis of the experimentally obtained and calculated crystallographic texture indicates that the converted TiO2 layer has a polycrystalline structure with the preferred orientations. According to the Raman spectroscopy the amount of anatase phase increases with the number of laser pulses indicating the dose-dependent conversion process.

참고문헌 (Reference)

1 Tim Luttrell, "Why is anatase a better photocatalyst than rutile? - Model studies on epitaxial TiO2 films" Springer Science and Business Media LLC 4 (4): 4043-, 2015

2 Vinodkumar Etacheri, "Visible-light activation of TiO2 photocatalysts: Advances in theory and experiments" Elsevier BV 25 : 1-29, 2015

3 A FUJISHIMA, "TiO2 photocatalysis and related surface phenomena" Elsevier BV 63 (63): 515-582, 2008

4 Hengzhong Zhang, "Thermodynamic analysis of phase stability of nanocrystalline titania" Royal Society of Chemistry (RSC) 8 (8): 2073-2076, 1998

5 Juan C. Garcia, "The nature of interfaces and charge trapping sites in photocatalytic mixed-phase TiO2 from first principles modeling" AIP Publishing 142 (142): 024708-, 2015

6 G. Merle, "Self-assembled photoactive heterojunction phase gradient" Royal Society of Chemistry (RSC) 2 (2): 8868-8874, 2014

7 T. Potlog, "Rutile to anatase phase transition in TiO2:Nb thin films by annealing in H2 atmosphere" 한국물리학회 16 (16): 826-829, 2016

8 Jin-Wook Lee, "Rutile TiO2-based perovskite solar cells" Royal Society of Chemistry (RSC) 2 (2): 9251-, 2014

9 Dorian A. H. Hanaor, "Review of the anatase to rutile phase transformation" Springer Science and Business Media LLC 46 (46): 855-874, 2011

10 Ming Xiao, "Resistive Switching Memory of TiO2 Nanowire Networks Grown on Ti Foil by a Single Hydrothermal Method" Springer Science and Business Media LLC 9 (9): 15-, 2017

11 K. Lagarec, "Raman study of single crystal anatase TiO2 upto 70 GPa" 94 : 519-524, 1995

12 H.L. Ma, "Raman study of phase transformation of TiO2 rutile single crystal irradiated by infrared femtosecond laser" Elsevier BV 253 (253): 7497-7500, 2007

13 Michael Grätzel, "Photoelectrochemical cells" Springer Science and Business Media LLC 414 (414): 338-344, 2001

14 Amy L. Linsebigler, "Photocatalysis on TiO2 Surfaces: Principles, Mechanisms, and Selected Results" American Chemical Society (ACS) 95 (95): 735-758, 1995

15 J.Y. Yang, "Phase transformation at the surface of TiO2 single crystal irradiated by femtosecond laser pulse" Springer Science and Business Media LLC 88 (88): 801-804, 2007

16 Bhavana N. Joshi, "Niobium-Doped Titania Photocatalyst Film Prepared via a Nonaqueous Sol-Gel Method" Wiley 96 (96): 2623-2627, 2013

17 S. Hishita, "Inhibition mechanism of the anatase-rutile phase transformation by rare earth oxides" Elsevier BV 9 (9): 61-67, 1983

18 Ming-Yi Pu, "Improved performance of dye-sensitized solar cells with laser-textured nanoporous TiO2 photoanodes" Elsevier BV 66 (66): 162-164, 2012

19 Hongyi Tian, "Hierarchical (001) facet anatase/rutile TiO2 heterojunction photoanode with enhanced photoelectrocatalytic performance" Elsevier BV 96 : 199-205, 2013

20 S. J. Smith, "Heat capacities and thermodynamic functions of TiO2 anatase and rutile: Analysis of phase stability" Mineralogical Society of America 94 (94): 236-243, 2009

21 Yongqiang Cao, "Fabrication of rutile TiO2-Sn/Anatase TiO2-N heterostructure and its application in visible-light photocatalysis" American Chemical Society (ACS) 114 (114): 3627-3633, 2010

22 Changhua Wang, "Correlation between band alignment and enhanced photocatalysis: a case study with anatase/TiO 2 (B) nanotube heterojunction" Royal Society of Chemistry (RSC) 44 (44): 13331-13339, 2015

23 David O. Scanlon, "Band alignment of rutile and anatase TiO2" Springer Science and Business Media LLC 12 (12): 798-801, 2013

24 Yang Mi, "Band Alignment and Controllable Electron Migration between Rutile and Anatase TiO2" Springer Science and Business Media LLC 5 (5): 11482-, 2015