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Korean Journal of Chemical Engineering, Vol.29, No.6, 731-736, 2012
Structural and photoelectrochemical characterization of TiO2 nanowire/nanotube electrodes by electrochemical etching
TiO2 nanowire/nanotube electrodes were synthesized by anodization of titanium foils in ethylene glycol solution containing 0.5 wt% NH4F and 1 wt% water at 60 V for 6 h. The microstructure and morphology of the asprepared electrodes were investigated by XRD and SEM. A possible formation mechanism and oxidation parameters of nanocomposite structure were discussed. The relationship between structural characteristics of TiO2 nanowire/nanotube electrodes and its photoelectrochemical characterization were evaluated by electrochemical analyzer and photocatalytic degradation of methylene blue (MB) solution. Furthermore, these TiO2 nanowire/nanotube electrodes promoted the photoelectrochemical characterization due to the larger surface areas, enhanced light harvesting and electron transport rate. The results show that photocurrent density of 1.44mA/cm2 and photocatalytic degradation of 95.51% was achieved for TiO2 nanowire/nanotube electrodes, which were 0.55mA/cm2 and 20.52% higher than the TiO2 nanotube electrodes under a similar condition, respectively.
[References]
- Raja KS, Mahajan VK, Misra M, J. Power Sources, 159(2), 1258, 2006
- Mor GK, Shankar K, Paulose M, Nano Lett., 5, 191, 2005
- Bahnemann DW, Kholuiskaya SN, Dillert R, Appl. Catal.B., 32, 161, 2002
- Kiss J, Ovari L, Oszkoa A, Surface Sci., 605, 1048, 2011
- Baxter JB, Aydil ES, Sol. Energy Mater. Sol. Cells., 90, 607, 2006
- Qui JJ, Jin ZG, Liu ZF, Liu XX, Liu GQ, Wu WB, Zhang X, Gao XD, Thin Solid Films, 515(5), 2897, 2007
- Hosono E, Fujihara S, Honna I, Zhou HS, Adv. Mater., 17(17), 2091, 2005
- Macak JM, Tsuchiya H, Ghicov A, Electrochem. Commun., 7, 1133, 2005
- Varghese OK, Gong DW, Paulose M, Sens. Actuators, B., 93, 338, 2003
- Malwadkar SS, Gholap RS, Awate SV, J. Photochem.Photobiol., A., 203, 24, 2009
- Paulose M, Mor GK, Varghese OK, J. Photochem. Photobiol.,A., 178, 8, 2006
- Idakiev V, Yuan ZY, Tabakova T, Su BL, Appl. Catal. A: Gen., 281(1-2), 149, 2005
- Taveira LV, Macak JM, Tsuchiya H, Dick LFP, Schmuki P, J. Electrochem. Soc., 152(10), B405, 2005
- Wang YH, Yang HX, Xu HM, Mater. Lett., 64, 164, 2010
- Pang XY, He DM, Luo SL, Sens. Actuators, B., 137, 134, 2009
- Ruan CM, Paulose M, Varghese OK, Mor GK, Grimes CA, J. Phys. Chem. B, 109(33), 15754, 2005
- Inoue M, Murase A, Surf. Interface Anal., 37, 1111, 2005
- Paulose M, Shankar K, Yoriya S, Prakasam HE, Varghese OK, Mor GK, Latempa TA, Fitzgerald A, Grimes CA, J. Phys. Chem. B, 110(33), 16179, 2006
- Grimes CA, J. Phys. Chem., 15, 1451, 2007
- Allam NK, Grimes CA, Sol. Energy Mater. Sol. Cells., 92, 1468, 2008
- Lim JH, Choi J, Small., 3, 1504, 2007
- Das PP, Mohapatra SK, Misra M, J. Phys. D: Appl. Phys., 41, 245103, 2008
- Xiao ZL, Han CY, Welp U, Nano Lett., 2, 1293, 2002
- Kim D, Ghicov A, Schmuki P, Electrochem. Commun., 10, 1835, 2008
- Sun LD, Zhang S, Sun XW, J. Electroanal. Chem., 637, 6, 2009
- Wang J, Lin ZQ, Chem. Mater., 20, 1257, 2008
- Raja KS, Gandhi T, Misra M, Electrochem. Commun., 9, 1069, 2007
- Chen W, Zhang HG, Hsing IM, Electrochem. Commun., 11, 1057, 2009
- Wu ZB, Guo S, Wang HQ, Electrochem. Commun., 11, 1692, 2009
- Jang JS, Kim HG, Joshi UA, Int. J. Hydrog. Energy., 33, 5975, 2008
- Yao WT, Yu SH, Liu SJ, Chen JP, Liu XM, Li FQ, J. Phys. Chem. B, 110(24), 11704, 2006
- Wu ZB, Dong F, Zhao WR, Nanotechnology., 20, 5701, 2009
- Lu B, Li H, Liao L, Nanotechnology., 19, 5605, 2008
[Cited By]
- Yang J, Lin Y, Meng Y, Korean Journal of Chemical Engineering, 30(11), 2026, 2013
- Choi KI, Lee W, Beak SW, Song J, Lee S, Lim C, Korean Chemical Engineering Research, 52(5), 667, 2014
- Shin DG, Jin EJ, Lee YJ, Kwon WT, Kim Y, Kim SR, Riu DH, Korean Chemical Engineering Research, 53(3), 276, 2015
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