A method for determining the amount of substrate adsorbed onto the catalyst surface in liquid-solid photocatalytic system under reaction conditions (photoadsorption) is proposed. The method has been applied to the photocatalytic oxidation of benzyl alcohol carried out in aqueous suspensions of a home prepared TiO2 catalyst. The influence of alcohol concentration, catalyst amount and irradiation power on photoadsorption was investigated. The photoadsorption per unit mass of catalyst increased by increasing concentration of benzyl alcohol and irradiation power but it decreased, increasing the catalyst amount. By taking into account the photoadsorption phenomena, the kinetic modeling of the photooxidation process has been carried out and the parameters of the model have been determined. The results indicate that all these parameters are favorably affected by an increase of the photon flow absorbed per unit mass of catalyst.
Yurdakal, S., Loddo, V., Palmisano, G., Augugliaro, V., Palmisano, L. (2009). A quantitative method of photoadsorption determination for irradiated catalyst in liquid-solid system. CATALYSIS TODAY, 143, 189-194 [10.1016/j.cattod.2008.06.032].
A quantitative method of photoadsorption determination for irradiated catalyst in liquid-solid system
LODDO, Vittorio;PALMISANO, Giovanni;AUGUGLIARO, Vincenzo;PALMISANO, Leonardo
2009-01-01
Abstract
A method for determining the amount of substrate adsorbed onto the catalyst surface in liquid-solid photocatalytic system under reaction conditions (photoadsorption) is proposed. The method has been applied to the photocatalytic oxidation of benzyl alcohol carried out in aqueous suspensions of a home prepared TiO2 catalyst. The influence of alcohol concentration, catalyst amount and irradiation power on photoadsorption was investigated. The photoadsorption per unit mass of catalyst increased by increasing concentration of benzyl alcohol and irradiation power but it decreased, increasing the catalyst amount. By taking into account the photoadsorption phenomena, the kinetic modeling of the photooxidation process has been carried out and the parameters of the model have been determined. The results indicate that all these parameters are favorably affected by an increase of the photon flow absorbed per unit mass of catalyst.
| File | Dimensione | Formato | |
|---|---|---|---|
|
64.Cat Today.pdf
Solo gestori archvio
Descrizione: Articolo completo
Dimensione
397.55 kB
Formato
Adobe PDF
|
397.55 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
