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Received April 22, 2008
Accepted August 2, 2008
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Synthesis of nanometer sized Bi2WO6s by a hydrothermal method and their conductivities
Department of Chemistry, College of Science, Yeungnam University, Gyeongsan, Gyeongbuk 712-749, Korea 1Department of Environmental Science and Engineering, KyungHee University, Yongin, Gyeonggi 449-701, Korea 2Research Institute of Industrial Science & Technology (RIST), Pohang, Gyeongbuk 790-600, Korea
Korean Journal of Chemical Engineering, January 2009, 26(1), 261-264(4), 10.1007/s11814-009-0044-7
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Abstract
Nanometer-sized bismuth tungsten oxides, Bi2WO6s, were successfully synthesized by hydrothermal treatment at 200 ℃ for 24 hr, and their morphologies and crystallite sizes were influenced by adjusting the conditions to pH 4, 7, and 9. TEM images revealed that the particles were sheet-shaped and the crystallite sizes ranged from 7-120 nm. The samples absorbed in the visible range at about 380-400 nm. The lowest conductivity, 1.0×10^(6) ohm/square, was observed for Bi2WO6 prepared at pH 4 with a 150 nm film thickness. As the annealing temperature for Bi2WO6 prepared at pH 7 was increased, the conductivity decreased due of formation of larger particles by coagulation and sintering at high temperatures. Conductivity appears to improve with increasing film thickness up to 1,500 nm.
References
Frit B, Mercurio JP, J. Alloy. Compd., 188, 27 (1992)
Sharma V, Shukla AK, Gopalakrishnan J, J. Mater. Chem., 4, 703 (1994)
Zhang S, Shen J, Fu H, Dong W, Zheng Z, Shi L, J. Solid State Chem., 180, 1456 (2007)
Zhao X, Xu TG, Yao WQ, Zhang C, Zhu YF, Appl. Catal. B: Environ., 72(1-2), 92 (2007)
Cruz AM, Rodriguez FEL, Mater. Res. Bull., 42, 1851 (2007)
Hsieh CY, Fung KZ, J. Phys. Chem. Solids, 69, 302 (2008)
Yu J, Xiong J, Cheng B, Yu Y, Wang J, J. Solid State Chem., 178, 1968 (2005)
Jeon HJ, Jeon MK, Kang M, Lee SG, Lee YL, Hong YK, Choi BH, Mater. Lett., 59, 1801 (2005)
Jeon MK, Kang M, Mater. Lett., 62, 676 (2008)
Zhou L, Wang WZ, Zhang LS, J. Mol. Catal. A-Chem., 268(1-2), 195 (2007)
Fu H, Pan C, Zhang L, Zhu Y, Mater. Res. Bull., 42, 696 (2007)
Crane M, Forst R, Willams P, Kloprogge T, J. Raman Spectrosc., 33, 62 (2002)
Sharma V, Shukla AK, Gopalakrishnan J, J. Mater. Chem., 4, 703 (1994)
Zhang S, Shen J, Fu H, Dong W, Zheng Z, Shi L, J. Solid State Chem., 180, 1456 (2007)
Zhao X, Xu TG, Yao WQ, Zhang C, Zhu YF, Appl. Catal. B: Environ., 72(1-2), 92 (2007)
Cruz AM, Rodriguez FEL, Mater. Res. Bull., 42, 1851 (2007)
Hsieh CY, Fung KZ, J. Phys. Chem. Solids, 69, 302 (2008)
Yu J, Xiong J, Cheng B, Yu Y, Wang J, J. Solid State Chem., 178, 1968 (2005)
Jeon HJ, Jeon MK, Kang M, Lee SG, Lee YL, Hong YK, Choi BH, Mater. Lett., 59, 1801 (2005)
Jeon MK, Kang M, Mater. Lett., 62, 676 (2008)
Zhou L, Wang WZ, Zhang LS, J. Mol. Catal. A-Chem., 268(1-2), 195 (2007)
Fu H, Pan C, Zhang L, Zhu Y, Mater. Res. Bull., 42, 696 (2007)
Crane M, Forst R, Willams P, Kloprogge T, J. Raman Spectrosc., 33, 62 (2002)
