Effects of Grain Orientation and Oxidation Voltage on Morphology of Anodized Ta2O5 Nanotubes
ZHANG Yu1, LIU Shifeng1, LI Lijuan1, ZHU Jialin1, DENG Chao1,2
1 College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; 2 Electron Microscopy Center of Chongqing University, Chongqing 400044, China
Abstract: Ta2O5 nanotubes were prepared by single crystals with different orientation, including (110) and (111), anodizing at constant voltage 30 V for 1 min in a concentrated H2SO4/HF solution with a volume ratio of 9∶1. The effect of grain orientations on the morphology of anodized Ta2O5 nanotubes was investigated by comparing the SEM images of Ta2O5 nanotubes grown on single crystals with different grain orientation. At the same electrolyte system, the effect of oxidation potentials on the morphology of Ta2O5 nanotubes was investigated by oxidizing for 30 s under the voltage of 5 V, 15 V, 25 V, and 35 V, respectively. The results showed that the (111) orientation was more favorable for the growth of Ta2O5 nanotubes, which led to a structure with 6.28 μm in thickness with the clustered Ta2O5 nanotubes at top and a rough outside wall, similar to bamboo, however the Ta2O5 nanotubes prepared by (110) orientation had good openings and smooth outer wall, and the tube length was about 3.71 μm. The study also found that the tube length and diameter of Ta2O5 nanotubes are positively correlated with the oxidation voltage, moreover the length and diameter of Ta2O5 nanotubes grown by (111) single crystals were better than those of (110) single crystals. Growth rate of Ta2O5 nanotubes was related to grain orientation. The difference in the length and diameter of Ta2O5 nanotubes prepared by different orientation single crystals was mainly due to the atomic planar density, the higher the atomic planar density, the smaller the growth rate of the nanotubes and the shorter the Ta2O5 nanotubes length, the smaller the Ta2O5 nanotubes diameter.
张玉, 刘施峰, 李利娟, 祝佳林, 邓超. 晶粒取向及氧化电压对阳极氧化Ta2O5纳米管形貌的影响[J]. 材料导报, 2020, 34(8): 8010-8013.
ZHANG Yu, LIU Shifeng, LI Lijuan, ZHU Jialin, DENG Chao. Effects of Grain Orientation and Oxidation Voltage on Morphology of Anodized Ta2O5 Nanotubes. Materials Reports, 2020, 34(8): 8010-8013.
1 Mor G K, Shankar K, Paulose M, et al. Nano Letters, 2006, 6(2), 215. 2 Gonçalves R V, Wojcieszak R, Uberman P M, et al. Catalysis Communications, 2014, 48(48), 50. 3 Cong Y, Park H S, Wang S, et al. Journal of Physical Chemistry C, 2012, 116(27), 14541. 4 Chen W, Tu Q, Wu H, et al. Electrochimica Acta, 2017, 236, 140. 5 Momeni M M, Mirhosseini M, Chavoshi M, et al. Journal of Materials Science: Materials in Electronics, 2015, 27(4), 3941. 6 Allam N K, Feng X J, Grimes C A. Chemistry of Materials, 2012, 20(20), 6477. 7 Elsayed H A, Birss V I. Nano Letters, 2009, 9(4), 1350. 8 Xin R, Li B, Li L, et al. Materials & Design, 2011, 32(8), 4548. 9 Hamu G B, Eliezer D, Wagner L. Journal of Alloys & Compounds, 2009, 468(1), 222. 10 Song G L, Xu Z. Corrosion Science, 2012, 54(1), 97. 11 Diamanti M V, Pedeferri M P, Schuh C A. Metallurgical & Materials Transactions A, 2008, 39(9), 2143. 12 Davepon B, Schultze J W, König U, et al. Surface & Coatings Technology, 2003, 169(3), 85. 13 Crawford G A, Chawla N. Scripta Materialia, 2009, 60(10), 874. 14 Macak J M, Jarosova M, Jäger A, et al. Applied Surface Science, 2016, 371, 607. 15 Leonardi S, Russo V, Bassi A L, et al. ACS Applied Materials & Interfaces, 2015, 7(3), 1662. 16 König U, Davepon B. Electrochimica Acta, 2001, 47(1), 149. 17 Macak J M, Sirotna K, Schmuki P. Electrochimica Acta, 2005, 50(18), 3679. 18 Costa J D, Quitério P, Apolinário A, et al. Materials Letters, 2016, 171, 224. 19 Fan H Y, Liu S F, Guo Y, et al. Applied Surface Science, 2015, 339, 15.
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2020, Vol. 34 
