Download e-book for iPad: Chemistry on Modified Oxide and Phosphate Surfaces: by Robson Fernandes de Farias

By Robson Fernandes de Farias

ISBN-10: 0123725542

ISBN-13: 9780123725547

This identify within the authoritative Interface technological know-how and know-how sequence provides the major good points and purposes of transformed oxide and phosphate surfaces. * Examines either easy and utilized elements * comprises examples from fresh courses

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Extra info for Chemistry on Modified Oxide and Phosphate Surfaces: Fundamentals and Applications

Example text

However, it is necessary to say that many other specific lamellar oxides are investigated, such as V2O5. 2. T ITANATES AND NIOBATES Layered titanates and niobates such as K2Ti4O9, Na2Ti3O7, KNb3O8, and K4Nb6O17, as well as their acid forms, that is, H2Ti4O9, H2Ti3O7, HNb3O8, and H4Nb6O17 can be used as cation exchangers toward Cu2þ [1]. 1016/S1573-4285 (08) 00406-7 Ó 2009 Elsevier Ltd. All rights reserved. 57 58 Chemistry on Modified Oxide and Phosphate Surfaces: Fundamentals and Applications 6, 7, and 8 [2].

However, when nitrogen atoms in imine groups are protonated, N and its neighboring quinoid ring become a semiquinoid radical cation, causing a decrease in the exciton absorption peak intensity and a generation of the absorption peaks about 420 nm and 865 nm due to the presence of polaron/ bipolaron. When Pani is doped with lithium salts, absorption bands at 420 and 865 nm are observed, suggesting a doping process similar to those caused by Brønsted acids. However, when Pani samples are doped with SnCl4 or FeCl3 somewhat different results are obtained.

Non-Cryst. Solids 261 (2000) 181. F. de Farias, C. Airoldi, Colloids Surf. A 172 (2000) 145. F. de Farias, L. Martinez, C. Airoldi, J. Non-Cryst. Solids 276 (2000) 56. F. de Farias, S. F. F. de Sa´, Bull. Chem. Technol. Macedonia 23 (2004) 7. F. de Farias, C. Airoldi, J. Solid State Chem. 158 (2001) 134. F. de Farias, J. Non-Cryst. Solids 288 (2001) 218. A. Fujishima, K. Hashimoto, T. , Tokyo, 1999. F. de Farias, C. Airoldi, J. Non-Cryst. Solids 351 (2005) 84. F. , J. Phys. Chem. Solids 64 (2003) 2385.

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Chemistry on Modified Oxide and Phosphate Surfaces: Fundamentals and Applications by Robson Fernandes de Farias


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