Department of Chemistry, Semnan University, Semnan, Iran.
Bi2Mn2O7 nano-powders were synthesized via a stoichiometric 1:1 Bi:Mn molar ratio hydrothermal method at 180 °C for 48 h in a 1M NaOH aqueous solution; and solid state method, using Bi(NO3)3.5H2O and MnO2 as raw materials. The synthesized materials were characterized by powder X-ray diffraction (PXRD) technique. Also, the rietveld analysis was done in FullProf in profile matching mode. It was found that Bi2Mn2O7 crystallizes in a cubic crystal structure with space groupFd3 ̄m. The size and morphologies of the synthesized materials were studied by transmission electron microscopy (TEM) and field emission scanning electron microscopy (FESEM) techniques, respectively. The FESEM images showed that the synthesized Bi2Mn2O7 has rod like structure in hydrothermal method and a mixture of rod and particle structures in solid state method. Also, BET-BJH analysis investigated for determination of pore size, pore volume, average particle size, pore width and surface area of the obtained materials. Also, photoluminescence spectra of the obtained materials were studied.
N. Sharma, G. V. SubbaRao, B. V. R. Chowdhuri, “Anodic properties of tin oxides with pyrochlore structure for lithium ion batteries”, J. Power Sources., Vol. 159, 2006, pp. 340–344.
B. P. Mandal, N. Garg, S. M. Sharma, A. K. Tyagi, “Preparation, XRD and Raman spectroscopic studies on new compounds Re2Hf2O7 (RE=Dy, Ho, Er, Tm, Lu, Y): Pyrochlores or defect-fluorite?”, J. Solid State Chem., Vol. 179, 2006, pp. 1990–1994.
K. Li, T. Zhang, H. Wang, H. Yan, “Low-temperature synthesis and structure characterization of the serials Y2-δBiδSn2O7 ( ) nanocrystals:, J. Solid State Chem., Vol. 179, 2006, pp. 1029–1034.
H. L. Zhu, D. R. Yang, L. M. Zhu, D. S. Li, P. H. Chen, G. X. Yu, “Hydrothermal Synthesis and Photoluminescence Properties of La2−xEuxSn2O7 (x=0–2.0) Nanocrystals”, J. Am. Ceram.Soc., Vol. 90, 2007, pp. 3095–3098.
K. E. Sickafus, L. Minervini, R. W. Grimes, J. A. Valdez, M. Ishimaru, F. Li, K. J. McClellan, T. Hartmann, “Radiation tolerance of complex oxides”, Science., Vol. 289, 2000, pp. 748–751.
M. Sellami, V. Caignaert, M. Hamdad, A. Belarbi, I. Sari-Mohamed, A. Bahmani, N. Bettahar, “Synthesis and characterization of the new pyrochlore Bi1.5Sb1.5-xNbxMnO7 solid solution”, C. R. Chimie., Vol. 14, 2011, pp. 887–890.
A. H. Shaari, W. M. Daud, W. Yusoff, M. Hashim, Z. A. Talib, L. K. Pah, T. B. Ping, “sample preparation and dielectric spectrum equivalent circuits modeling for Bi2Mn2O7”, Solid State Science and Technology., Vol. 15, 2007, pp. 223-228.
K. koga, T. Momai, M. Matsunaga, “composition and properties of pyrochlore-type oxides for air electrode in secondary cells”, ECS Transactions., Vol. 11(3), 2008, pp.101-104.
MA. Subramanian, G. Aravamudan, S. Rao, Prog. Solid State Chem, 15 (1983) 55.
K. Ozawa, “Lithium Ion Rechargeable Batteries: Materials, Technology, and New Applications”, John Wiley & Sons. Section 3.
M. Sellami, V. Caignaert, M. Hamdad, A. Bekka, N. Bettahar, “Synthesis and characterization of new pyrochlore solid solution Bi1.5Sb1.5Cu1−xMnxO7”, J. Alloys and Compounds., Vo. 482, 2009, pp. 13–18.
F. W. Bezerra Lopes, C. P. de Souza, A. M. V. de Morais, J. P. Dallas, J. R. Gavarri, “Determination of RE2Ce2O7pyrochlore phases from monazite–allanite ores”, Hydrometallurgy, Vol. 97, 2009, pp. 167–172.
Z. Hong-song, W. Yuan, L. Gang, C. Xiao-ge, W. Xin-Li, “Investigation about thermal conductivities of La2Ce2O7 doped with calcium or magnesium for thermal barrier coatings”, J. Alloys and Compounds., Vol. 537, 2012, pp. 141–146.
J. In, I. Yoon, K. Seo, J. Park, J. Choo, Y. Lee, B. Kim, “Polymorph-Tuned Synthesis of α – an β -Bi2O3 Nanowires and Determinationof Their Growth Direction from Polarized Raman Single Nanowire Microscopy”, Chem. Eur., J. Vo. 17, 2011, pp. 1304–1309.
C. Jin, H. Kim, K. Baek, H. W. Kim, C. Lee, “Structure and Photoluminescence Properties of Bi2O3/ZnO Coaxial Nanorods”, Journal of the Korean Physical Society, Vol. 57, No. 6, 2010, pp. 1634-1638.
16. Y. Zhydachevskii, D. Galanciak, S. Kobyakov, M. Berkowski, A. Kamińska, A. Suchocki, Y. Zakharko, A. Durygin, “Photoluminescence studies of Mn4+ ions in YAlO3 crystals at ambient and high pressure”, Journal of Physics: Condensed Matter Volume 18 Number 49, 2006, pp. 11385–11396.