Crystallographic shear of polymorphic TiO2 nanocondensates with enhanced Cr2O3 dissolution via pulsed laser ablation
Source abstract
Abstract
TiO2 nanoparticles with enhanced solid solution of Cr up to 16 wt% in polymorphs of rutile, anatase, brookite, α-PbO2-type, and occasionally baddeleyite-type were synthesized via pulse laser ablation on ceramic TiO2 target dissolved with Cr2O3 or clamped Cr/Ti plates in air. Analytical electron microscopic observations indicated these nanocondensates have prevalent crystallographic shear (CS) along specific planes to form superstructures. The rutile type typically shows (100) and (010) CS besides the conventional ones rotating about the [111] zone axis as reported for ambient samples. The CS planes are parallel to (001) for anatase, (001) and ( $$ \overline{1} $$ 10) for brookite, whereas (001) and {1 $$ \overline{3} $$ 1} for the α-PbO2-type TiO2 with varied extent of Cr dissolution. Surface modification, as a result of Cr dissolution and/or internal stress, was observed for all the polymorphs.
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Research context
OpenAlex topics: Electronic and Structural Properties of Oxides · ZnO doping and properties · Laser-Ablation Synthesis of Nanoparticles
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (29)
Show source-provided references
1. Andersson S (1960) The crystal structure of Ti5O9. Acta Chem Scand 14:1161–117210.3891/acta.chem.scand.14-1161 ↗
2. Bhattacharya P, Rasmi RD, Katiyar RS (2003) Fabrication of stable wide-band-gap ZnO/MgO multilayer thin films. Appl Phys Lett 83:2010–201210.1063/1.1609250 ↗
3. Bursill LA, Hyde BG (1971) Crystal structure in the 132 family of higher titanium oxides Ti n O2n−1. Acta Crystallogr Sect B 27:210–21510.1107/S0567740871001912 ↗
4. Bursill LA, Hyde BG (1972) Crystallographic shear in the higher titanium oxides: structure, texture, mechanisms and thermodynamics. Prog Solid State Chem 7:177–18210.1016/0079-6786(72)90008-8 ↗
5. Bursill LA, Hyde BG, Philp DK (1971) New crystallographic shear families derived from the rutile structure, and the possibility of continuous ordered solid solution. Phil Mag 23:1501–151310.1080/14786437108217017 ↗
6. Chen CH (2010) Dynamic condensation/decomposition and optical properties of Cr-dissolved TiO2 with rutile and post-rutile structures. MS thesis, National Sun Yat-sen University, Taiwan
7. Chen SY, Shen P (2002) Laser ablation condensation of α-PbO2-type TiO2. Phys Rev Lett 89:09610610.1103/PhysRevLett.89.096106 ↗
8. Chen SY, Shen P (2004) Laser ablation condensation and transformation of baddeleyite-type related TiO2. Jpn J Appl Phys 43:1519–152410.1143/JJAP.43.1519 ↗
9. Chen T, Shen P (2009) Defect clustering and ordering in Zn-doped TiO2 upon solution annealing. J Phys Chem C 113:328–33210.1021/jp8084793 ↗
10. Choopun S, Vispute RD, Yang W, Sharma RP, Venkatesan T (2002) Realization of band gap above 5.0 eV in metastable cubic-phase Mg x Z1 − x O alloy film. Appl Phys Lett 80:1529–153110.1063/1.1456266 ↗
11. Dietzel A, Flörke OW (1957) Ursache und vermeidung von verfärbungen beim nachbrennen von titanemails. Mitteilungen des Vereins Deutscher Emailfachleute 5:99–104
12. Fabris S, Paxton AT, Finnis MW (2002) A stabilization mechanism of zirconia based on oxygen vacancies only. Acta Mater 50:5171–517810.1016/S1359-6454(02)00385-3 ↗
13. Gibb RM, Anderson JS (1972) The system TiO2–Cr2O3: electron microscopy of solid solutions and crystallographic shear structures. J Solid State Chem 4:379–39010.1016/0022-4596(72)90153-3 ↗
14. Huang CN, Chen SY, Shen P (2007a) Condensation and decomposition of NiO-dissolved rutile nanospheres. J Phys Chem C 111:3322–332710.1021/jp0672510 ↗
15. Huang CN, Shen P, Chen SY (2007b) On the relaxation/transformation of NiO-dissolved TiO2 condensates with fluorite-type derived structures. J Solid State Chem 180:688–69410.1016/j.jssc.2006.11.027 ↗
16. Kröger FA, Vink HJ (1956) Relations between the concentrations of imperfections in crystalline solids. Solid State Phys 3:307–43510.1016/S0081-1947(08)60135-6 ↗
17. Kunisu M, Tanaka I, Yamamoto T, Suga T, Mizoguchi T (2004) The formation of a rock-salt type ZnO thin film by low-level alloying with MgO. J Phys Condens Matter 16:3801–380610.1088/0953-8984/16/21/028 ↗
18. Kuo MY, Chen CL, Yang HC, Hua CY, Shen P (2005) First-principles calculation of prevailing faces of α-PbO2 type TiO2. Phys Rev B 71:125405-1–125405-7
19. Lin CH, Chen SY, Ho NJ, Gan D, Shen P (2009a) Shape dependent local internal stress of α-Cr2O3 nanocrystal fabricated by pulsed laser ablation. J Phys Chem Solid 70:1505–151010.1016/j.jpcs.2009.09.015 ↗
20. Lin CH, Chen SY, Shen P (2009b) Defects, lattice correspondence, and optical properties of spinel-like Cr3O4 by pulsed laser ablation in water. J Phys Chem C 113:16356–1636310.1021/jp904288n ↗
21. Linsebigler AL, Lu G, Yates JT Jr (1995) Photocatalysis on TiO2 surfaces: principles, mechanisms, and selected results. Chem Rev 95:735–73810.1021/cr00035a013 ↗
22. Ohtomo A, Kawasaki M, Koida T, Masubuchi K, Koinuma H (1998) Mg x Zn1−x O as II–VI widegap semiconductor alloy. Appl Phys Lett 72:2466–246810.1063/1.121384 ↗
23. Philp DK, Bursill LA (1974) Continuous structure variation and rotating reciprocal lattices in the titanium–chromium oxides. Acta Cryst A 30:265–272 and literatures cited therein10.1107/S0567739474000544 ↗
24. Porter DA, Easterling KE, Sherif MY (2009) Phase transformations in metals and alloys, 3rd edn. CRC Press, Boca Raton
25. Shannon RD (1976) Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides. Acta Cryst. A32:751–76710.1107/S0567739476001551 ↗
26. Somiya S, Hirano S, Kamiya S (1978) Phase relations of the Cr2O3–TiO2 system. J Solid State Chem 25:273–28410.1016/0022-4596(78)90112-3 ↗
27. SØrensen OT (ed) (1981) Non-stoichiometric oxides. Academic Press, New York
28. Tsai MH, Chen SY, Shen P (2004) Imperfect oriented attachment: accretion and defect generation of nanosize rutile condensates. Nano Lett 4:1197–120110.1021/nl0495763 ↗
29. Yang KC, Shen P, Gan D (2006) Defect microstructures of TiO2 rutile due to Zr4+ dissolution and expulsion. J Solid State Chem 179:3478–348310.1016/j.jssc.2006.07.020 ↗