Analysis of the rate of ion exchange of K+ to H₃O+ during the preparation of H₃O+-β”-aluminas by a hydrothermal process
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H3O+-β"-aluminas were synthesized by a hydrothermal process in an autoclave, using K+-β"-aluminas and acetic acid (10 wt. %) as a precursor and an ion exchange medium, respectively. The potassium concentration of the precursor was varied within the molar ratio range, [K2O] : [Al2O3] = 1 : 4~1 : 8, and the acetic acid contents were chosen at the ratios of [K2O] : [CH3COOH] = 1 : 10, 1 : 50, and 1 : 100. The exchange reaction was carried out at 150, 170, and 200 for 2, 4, 6, 8, and 24 h. By repeating a 2 hour reaction twice, the first reaction followed by washing, the highest rate was able to be observed at above 90%. The phase stability and transformation was confirmed by XRD and an IR spectrum, and the ion exchange (rate) was analyzed by ICP and TGA.
Abstract
H3O+-β"-aluminas were synthesized by a hydrothermal process in an autoclave, using K+-β"-aluminas and acetic acid (10 wt. %) as a precursor and an ion exchange medium, respectively. The potassium concentration of the precursor was varied within the molar ratio range, [K2O] : [Al2O3] = 1 : 4~1 : 8, and the acetic acid contents were chosen at the ratios of [K2O] : [CH3COOH] = 1 : 10, 1 : 50, and 1 : 100. The exchange reaction was carried out at 150, 170, and 200 for 2, 4, 6, 8, and 24 h. By repeating a 2 hour reaction twice, the first reaction followed by washing, the highest rate was able to be observed at above 90%. The phase stability and transformation was confirmed by XRD and an IR spectrum, and the ion exchange (rate) was analyzed by ICP and TGA.
참고문헌 (16)
- B. Zhu, , J. Power Sources, 118, pp.47~53 (2003)
- G.C. Farrington, "Proc. International Conference on Fast Ion Transport in Solids Electrodes and Electrolyte" (1979), Lake Geneva, Wisconsin
- G.W. Schafer, "Solid State Ionics", 53, pp.559~563 (1992)
- G.W. Schafer, "Solid State Ionics", 77, pp.234~239 (1995)
- G. Yamaguchi, , Bull. Chem. Soc, 41, pp.93~99 (1968)
- G.W. Schafer, , Solid State Ionics, 97, pp.285~289 (1997)
- T.R.N. Kutty, "Solid StateIonics", pp.161~175 (2000)
- G.C. Farrington, , Mater. Res. Bull, 13, pp.763~773 (1978)
- H.J. Kim, "University of Stuttgart" (1997), Bericht
- W.S. Kim, , J. Korean Ind. Eng.Chem, 14, pp.739~743 (2003)
- W.Y. Chung, , J. Korean Ind. Eng.Chem, 14, pp.394~402 (2003)
- 임성기, "Influence of stabilizer (Li2O) on the sintering density and ionic conductivity of K-β", β''-aluminas, 2007, pp.8(4), 271~276[DOI]
- G.W. Schafer, "Solid StateIonics", 81, pp.43~51 (1995)
- A.P. De Kroon, , Chem.Mater, pp.878~887 (1995)
- C.H. Ham, , J. koreanInd. Eng. Chem, 10, pp.1086~1091 (1999)
- R.A. Nyqust, "Handbook of Infraredand Raman Spectra of Inorganic Compouns and OrganicSalts", Academic Press, 4, pp.241~ (1997)