2012 |
Diaz, C; Valenzuela, M L; Lavayen, V; O'dwyer, C Layered Graphitic Carbon Host Formation During Liquid-Free Solid State Growth of Metal Pyrophosphates Artículo de revista Inorganic Chemistry, 51 (11), pp. 6228-6236, 2012, ISSN: 0020-1669. Resumen | Enlaces | BibTeX | Etiquetas: characterization, nanocomposites, nanoparticles, nanotubes, nanowires precursor, pyrolysis, spectroscopic @article{RN89, title = {Layered Graphitic Carbon Host Formation During Liquid-Free Solid State Growth of Metal Pyrophosphates}, author = { C. Diaz and M.L. Valenzuela and V. Lavayen and C. O'dwyer}, url = {/brokenurl#<Go to ISI>://WOS:000304728500029}, doi = {10.1021/ic300767h}, issn = {0020-1669}, year = {2012}, date = {2012-01-01}, journal = {Inorganic Chemistry}, volume = {51}, number = {11}, pages = {6228-6236}, abstract = {We report a successful ligand- and liquid-free solid state route to form metal pyrophosphates within a layered graphitic carbon matrix through a single step approach involving pyrolysis of previously synthesized organometallic derivatives of a cyclotriphosphazene. In this case, we show how single crystal Mn2P2O7 can be formed on either the micro- or the nanoscale in the complete absence of solvents or solutions by an efficient combustion process using rationally designed macromolecular trimer precursors, and present evidence and a mechanism for layered graphite host formation. Using in situ Raman spectroscopy, infrared spectroscopy, X-ray diffraction, high resolution electron microscopy, thermogravimetric and differential scanning calorimetric analysis, and near-edge X-ray absorption fine structure examination, we monitor the formation process of a layered, graphitic carbon in the matrix. The identification of thermally and electrically conductive graphitic carbon host formation is important for the further development of this general ligand-free synthetic approach for inorganic nanocrystal growth in the solid state, and can be extended to form a range of transition metals pyrophosphates. For important energy storage applications, the method gives the ability to form oxide and (pyro)phosphates within a conductive, intercalation possible, graphitic carbon as host-guest composites directly on substrates for high rate Li-ion battery and emerging alternative positive electrode materials.}, keywords = {characterization, nanocomposites, nanoparticles, nanotubes, nanowires precursor, pyrolysis, spectroscopic}, pubstate = {published}, tppubtype = {article} } We report a successful ligand- and liquid-free solid state route to form metal pyrophosphates within a layered graphitic carbon matrix through a single step approach involving pyrolysis of previously synthesized organometallic derivatives of a cyclotriphosphazene. In this case, we show how single crystal Mn2P2O7 can be formed on either the micro- or the nanoscale in the complete absence of solvents or solutions by an efficient combustion process using rationally designed macromolecular trimer precursors, and present evidence and a mechanism for layered graphite host formation. Using in situ Raman spectroscopy, infrared spectroscopy, X-ray diffraction, high resolution electron microscopy, thermogravimetric and differential scanning calorimetric analysis, and near-edge X-ray absorption fine structure examination, we monitor the formation process of a layered, graphitic carbon in the matrix. The identification of thermally and electrically conductive graphitic carbon host formation is important for the further development of this general ligand-free synthetic approach for inorganic nanocrystal growth in the solid state, and can be extended to form a range of transition metals pyrophosphates. For important energy storage applications, the method gives the ability to form oxide and (pyro)phosphates within a conductive, intercalation possible, graphitic carbon as host-guest composites directly on substrates for high rate Li-ion battery and emerging alternative positive electrode materials. |
2012 |
Layered Graphitic Carbon Host Formation During Liquid-Free Solid State Growth of Metal Pyrophosphates Artículo de revista Inorganic Chemistry, 51 (11), pp. 6228-6236, 2012, ISSN: 0020-1669. |