Dissemin is shutting down on January 1st, 2025

Published in

Elsevier, Applied Catalysis B: Environmental, 1-2(99), p. 170-180

DOI: 10.1016/j.apcatb.2010.06.014

Links

Tools

Export citation

Search in Google Scholar

Influence of activated carbon in TiO2 and ZnO mediated photo-assisted degradation of 2-propanol in gas–solid regime

This paper is available in a repository.
This paper is available in a repository.

Full text: Download

Green circle
Preprint: archiving allowed
Red circle
Postprint: archiving forbidden
Red circle
Published version: archiving forbidden
Data provided by SHERPA/RoMEO

Abstract

2-Propanol was photocatalytically oxidized in the presence of binary materials composed by mixtures of home-prepared active carbon and commercial TiO2 or ZnO. Remarkable beneficial improvements of the photocatalytic activity were observed in the presence of activated carbon (AC). In particular the presence of AC along with TiO2 in the binary materials enormously increased the photocatalytic ability of the bare semiconductor to completely oxidize the substrate, indicating a synergy between the semiconductor and AC. Probably, when AC was present in the binary materials, the majority of the substrate and of the intermediates were reversibly adsorbed onto the AC surface. Due to the presence of a contact interface between TiO2 and AC, a continuous transfer of the species from the AC to the TiO2 surface was possible. On the other hand, the presence of AC avoided the deactivation of TiO2 that occurred instead for the bare semiconductor. The reaction rate in the presence of ZnO based materials was always lower with respect to that observed for the corresponding TiO2 ones, although the presence of AC improved the photoactivity of bare semiconductor in this case also.Graphical abstractResearch highlights▶ Active carbon (AC) and TiO2 or ZnO binary materials were prepared and characterized. ▶ The binary materials increased the photocatalytic ability of the bare semiconductor to completely oxidize 2-propanol in gas-solid regime. ▶ AC avoided the TiO2 deactivation.