Photocatalytic efficacy of ZnO films – light intensity and thickness effects

Autor:	E. Sindhuja, R. Uma, K. Ravichandran, T. Arun
Rok vydání:	2017
Předmět:	010302 applied physics Materials science Band gap business.industry Doping chemistry.chemical_element 02 engineering and technology Surfaces and Interfaces Zinc 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Surfaces Coatings and Films Light intensity Optics chemistry Chemical engineering 0103 physical sciences Materials Chemistry Photocatalysis 0210 nano-technology business Degradation rate constant
Zdroj:	Surface Engineering. 33:512-520
ISSN:	1743-2944 0267-0844
DOI:	10.1080/02670844.2016.1270797
Popis:	The aim of this work is to investigate the effects of film thickness, light intensity and Ag incorporation on the photoctalytic efficacy of zinc oxide films. ZnO films with different thicknesses were prepared using an automated home-made jet nebuliser spray technique. The results show that the thickness of the film has no appreciable influence on the photocatalytic efficiency of ZnO films whereas the light intensity strongly influences the photocatalytic activity of ZnO films. It is also found that doping of Ag with ZnO causes considerable enhancement in the photocatalytic activity. The dye degradation rate constant in the case of undoped ZnO film with thickness 400 nm is 0.0263min-1, whereas for Ag doped ZnO film having the same thickness, it is 0.0530 min−1. The reason for this enhancement in the photocatalytic efficacy of ZnO:Ag film is addressed with the help of optical band gap and the reported characteristics of Ag.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::92338c1b2d5a34e8c8c0222342ca6836 https://doi.org/10.1080/02670844.2016.1270797 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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