PREPARATION AND CHARACTERIZATION OF ZnO/CuO SEMICONDUCTOR AND PHOTOCATALYTIC ACTIVITY ON THE DECOLORIZATION OF DIRECT RED 80 AZODYE

Zinc oxide, an n-type semiconductor, has been used as photocatalyst for contaminated water purification by organic compounds. The addition of a p-type semiconductor as copper oxide could increase the catalytic efficiency through the p-n junction in order to decrease the electron-hole recombination....

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Autores principales:	SILVA,WALLACE J. C. DA, SILVA,MARCELO R. DA, TAKASHIMA,KEIKO
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2015
Materias:	heterogeneous photocatalysis zinc oxide copper oxide characterization direct red 80
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072015000400022
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spelling	oai:scielo:S0717-970720150004000222016-02-23PREPARATION AND CHARACTERIZATION OF ZnO/CuO SEMICONDUCTOR AND PHOTOCATALYTIC ACTIVITY ON THE DECOLORIZATION OF DIRECT RED 80 AZODYESILVA,WALLACE J. C. DASILVA,MARCELO R. DATAKASHIMA,KEIKO heterogeneous photocatalysis zinc oxide copper oxide characterization direct red 80 Zinc oxide, an n-type semiconductor, has been used as photocatalyst for contaminated water purification by organic compounds. The addition of a p-type semiconductor as copper oxide could increase the catalytic efficiency through the p-n junction in order to decrease the electron-hole recombination. In this work, zinc and copper oxides containing 1.0, 3.0, and 5.0 % of copper were prepared by manual grinding, followed by heat treatment at 300°C during 5 h. The zinc oxide and copper oxide mixture as well as their precursors were characterized by x-ray diffraction, diffuse reflectance, scanning electron microscopy, and x-ray fluorescence. The photocatalytic efficiency was verified by the direct red 80 tetraazodye decolorization using UV radiation under pseudo-first order conditions at natural pH (7.5-8.0) and 30 °C. The highest photocatalytic activity occurred to the semiconductor containing 1.0 % copper oxide, whose decolorization rate constant was equivalent to 6.40×10-2 min-1, that is, 17.4 % larger in comparison to ZnO, 5.45×10-2 min-1.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.60 n.4 20152015-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072015000400022en10.4067/S0717-97072015000400022
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	heterogeneous photocatalysis zinc oxide copper oxide characterization direct red 80
spellingShingle	heterogeneous photocatalysis zinc oxide copper oxide characterization direct red 80 SILVA,WALLACE J. C. DA SILVA,MARCELO R. DA TAKASHIMA,KEIKO PREPARATION AND CHARACTERIZATION OF ZnO/CuO SEMICONDUCTOR AND PHOTOCATALYTIC ACTIVITY ON THE DECOLORIZATION OF DIRECT RED 80 AZODYE
description	Zinc oxide, an n-type semiconductor, has been used as photocatalyst for contaminated water purification by organic compounds. The addition of a p-type semiconductor as copper oxide could increase the catalytic efficiency through the p-n junction in order to decrease the electron-hole recombination. In this work, zinc and copper oxides containing 1.0, 3.0, and 5.0 % of copper were prepared by manual grinding, followed by heat treatment at 300°C during 5 h. The zinc oxide and copper oxide mixture as well as their precursors were characterized by x-ray diffraction, diffuse reflectance, scanning electron microscopy, and x-ray fluorescence. The photocatalytic efficiency was verified by the direct red 80 tetraazodye decolorization using UV radiation under pseudo-first order conditions at natural pH (7.5-8.0) and 30 °C. The highest photocatalytic activity occurred to the semiconductor containing 1.0 % copper oxide, whose decolorization rate constant was equivalent to 6.40×10-2 min-1, that is, 17.4 % larger in comparison to ZnO, 5.45×10-2 min-1.
author	SILVA,WALLACE J. C. DA SILVA,MARCELO R. DA TAKASHIMA,KEIKO
author_facet	SILVA,WALLACE J. C. DA SILVA,MARCELO R. DA TAKASHIMA,KEIKO
author_sort	SILVA,WALLACE J. C. DA
title	PREPARATION AND CHARACTERIZATION OF ZnO/CuO SEMICONDUCTOR AND PHOTOCATALYTIC ACTIVITY ON THE DECOLORIZATION OF DIRECT RED 80 AZODYE
title_short	PREPARATION AND CHARACTERIZATION OF ZnO/CuO SEMICONDUCTOR AND PHOTOCATALYTIC ACTIVITY ON THE DECOLORIZATION OF DIRECT RED 80 AZODYE
title_full	PREPARATION AND CHARACTERIZATION OF ZnO/CuO SEMICONDUCTOR AND PHOTOCATALYTIC ACTIVITY ON THE DECOLORIZATION OF DIRECT RED 80 AZODYE
title_fullStr	PREPARATION AND CHARACTERIZATION OF ZnO/CuO SEMICONDUCTOR AND PHOTOCATALYTIC ACTIVITY ON THE DECOLORIZATION OF DIRECT RED 80 AZODYE
title_full_unstemmed	PREPARATION AND CHARACTERIZATION OF ZnO/CuO SEMICONDUCTOR AND PHOTOCATALYTIC ACTIVITY ON THE DECOLORIZATION OF DIRECT RED 80 AZODYE
title_sort	preparation and characterization of zno/cuo semiconductor and photocatalytic activity on the decolorization of direct red 80 azodye
publisher	Sociedad Chilena de Química
publishDate	2015
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072015000400022
work_keys_str_mv	AT silvawallacejcda preparationandcharacterizationofznocuosemiconductorandphotocatalyticactivityonthedecolorizationofdirectred80azodye AT silvamarcelorda preparationandcharacterizationofznocuosemiconductorandphotocatalyticactivityonthedecolorizationofdirectred80azodye AT takashimakeiko preparationandcharacterizationofznocuosemiconductorandphotocatalyticactivityonthedecolorizationofdirectred80azodye
_version_	1718445545616310272

PREPARATION AND CHARACTERIZATION OF ZnO/CuO SEMICONDUCTOR AND PHOTOCATALYTIC ACTIVITY ON THE DECOLORIZATION OF DIRECT RED 80 AZODYE

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