2005
DOI: 10.1021/cm050467e
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Electrical Conductivity of Zeolite Films:  Influence of Charge Balancing Cations and Crystal Structure

Abstract: The electrical conductivity of a series of zeolites varying the charge balancing cation, the crystal structure, and the water content has been measured. The current intensity versus voltage profiles of cells constructed with a conductive glass indium tin oxide anode, an aluminum cathode, and a 50 μm zeolite layer were highly reproducible. Typically, zeolites exhibit a semiconductor profile, dramatically increasing the electrical conductivity from the initial insulator regime to a conductive regime at breaking … Show more

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Cited by 54 publications
(46 citation statements)
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“…The reason for this has been explained by the electrical conductivity of the carbon supports [29] that increases the hydrogen surface coverage of Pd particles, resulting in an over reduction of the nitrate molecules that form ammonia instead of nitrogen. The electrical conductivity of the different supports has been measured using the system described in [30] and the results are shown in Table 2. As it can be seen the active carbon has the highest conductivity and it is the most selective towards ammonia as described in [29].…”
Section: Resultsmentioning
confidence: 99%
“…The reason for this has been explained by the electrical conductivity of the carbon supports [29] that increases the hydrogen surface coverage of Pd particles, resulting in an over reduction of the nitrate molecules that form ammonia instead of nitrogen. The electrical conductivity of the different supports has been measured using the system described in [30] and the results are shown in Table 2. As it can be seen the active carbon has the highest conductivity and it is the most selective towards ammonia as described in [29].…”
Section: Resultsmentioning
confidence: 99%
“…This is due to the increase in the number of cations present with decreasing Si/Al ratio. Therefore, the ion migration increases which enhances the apparent electrical conductivity [31]. For the composites of PEDOT-PSS_1:1 with zeolite ZSM-5, the same result occurs for the specific electrical conductivity ( Figure 2); it varies from (7.415 ± 0.466) x 10 -1 S/cm to (8.853 ± 0.509) x 10 -2 S/cm as Si/Al mole ratio is varied from 23 to 280.…”
Section: Electrical Conductivity Under Air and Nitrogen Exposurementioning
confidence: 99%
“…El barrido en la región de potenciales comprendida entre los picos de oxidación y reducción más próximos, da lugar a la misma curva que la indicada en la figura para los ciclos 21-25. Conviene hacer notar que observaciones similares han sido descritas para politiofenos 33,34 , así como para otros copolímeros donde ocurren procesos de transferencia de carga 35,36 . Mientras el origen de este par de picos que se desarrollan con los barridos no está completamente justificado, corresponden a una pareja rédox.…”
Section: Aparición De Picos Rédox Reversibles Durante Los Ciclos Del unclassified
“…Esta película consiste en el empaquetamiento de partículas esféricas de diámetro submicrométrico. A fin de poner en contexto en la película obtenida con las partículas de morfología esférica y mostrada en la figura 6.10, conviene comentar que estudios previos sobre la electroluminiscencia de moléculas encapsuladas en el interior de zeolitas han demostrado que la formación de películas con partículas de zeolita micrométrica de forma irregular es uno de los principales cuellos de botella para desarrollar dispositivos electroluminiscentes basados en zeolitas 18,[33][34][35] . Cuando en lugar de DPA@SPH el recubrimiento de electrodo de ITO se llevó a cabo con DPA@Sílica sin poseer una distribución homogénea de tamaño ni forma esférica, entonces la película resultante formada presenta una uniformidad considerablemente menor (mirar también figura 6.10).…”
Section: Propiedades Fotofísicas Y Aplicaciones De Las Esferas Fotoacunclassified