Oxidative leaching of chromium from layered double hydroxides: Mechanistic studies
作者： A. V. Radha , P. Vishnu Kamath
DOI: 10.1007/BF02704772
关键词: Leaching (metallurgy) 、 Chromate conversion coating 、 Layered double hydroxides 、 Inorganic chemistry 、 Chromium 、 Divalent 、 Hydroxide 、 Hypochlorite 、 Stichtite 、 Materials science
摘要: The layered double hydroxide (LDH) of Zn with Cr on treatment a hypochlorite solution releases chromate ions as result oxidative leaching by dissolution-reprecipitation mechanism. residue is found to be e-Zn(OH)2. LDH Mg the other hand resistant leaching. In contrast, X-ray amorphous gel coprecipitated hydroxides and yields ions. These results suggest that oxidation potential Cr(III) in LDHs determined nature divalent ion crystallinity phase while being unaffected intercalated anions.
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sci-hub.se 参考文章(18)
H. R. Oswald, R. Asper, Bivalent Metal Hydroxides Preparation and Crystal Growth of Materials with Layered Structures. pp. 71- 140 ,(1977) , 10.1007/978-94-017-2750-1_3
Preparation and Crystal Growth of Materials with Layered Structures Springer Netherlands. ,(1977) , 10.1007/978-94-017-2750-1
P. Vishnu Kamath, Mridula Dixit, L. Indira, A. K. Shukla, V. Ganesh Kumar, N. Munichandraiah, Stabilized α ‐ Ni ( OH ) 2 as Electrode Material for Alkaline Secondary Cells Journal of The Electrochemical Society. ,vol. 141, pp. 2956- 2959 ,(1994) , 10.1149/1.2059264
Robert P. Grosso, Steven L. Suib, Robert S. Weber, Paul F. Schubert, Main effects in the syntheses of copper/chromium layered double hydroxides Chemistry of Materials. ,vol. 4, pp. 922- 928 ,(1992) , 10.1021/CM00022A032
R.S. Jayashree, P. Vishnu Kamath, Layered double hydroxides of Ni with Cr and Mn as candidate electrode materials for alkaline secondary cells Journal of Power Sources. ,vol. 107, pp. 120- 124 ,(2002) , 10.1016/S0378-7753(01)00994-6
P.Vishnu Kamath, G.Helen Annal Therese, J. Gopalakrishnan, On the existence of hydrotalcite-like phases in the absence of trivalent cations Journal of Solid State Chemistry. ,vol. 128, pp. 38- 41 ,(1997) , 10.1006/JSSC.1996.7144
Joseph W. Boclair, Paul S. Braterman, One-step formation and characterization of Zn(II)-Cr(III) layered double hydroxides, Zn2Cr(OH)6X (X = Cl, 1/2SO4). Chemistry of Materials. ,vol. 10, pp. 2050- 2052 ,(1998) , 10.1021/CM980298G
H. F. W. Taylor, Crystal structures of some double hydroxide minerals Mineralogical Magazine. ,vol. 39, pp. 377- 389 ,(1973) , 10.1180/MINMAG.1973.039.304.01
Michael Rajamathi, Grace S. Thomas, P. Vishnu Kamath, The many ways of making anionic clays Journal of Chemical Sciences. ,vol. 113, pp. 671- 680 ,(2001) , 10.1007/BF02708799
F. Cavani, F. Trifirò, A. Vaccari, Hydrotalcite-type anionic clays: Preparation, properties and applications. Catalysis Today. ,vol. 11, pp. 173- 301 ,(1991) , 10.1016/0920-5861(91)80068-K