Photocurrent Response and Progesterone Degradation by Employing WO 3 Films Modified with Platinum and Silver Nanoparticles.

Autor: Joseita Dos Santos Costa M; Department of Chemistry PPGQ-GERATEC, Universidade Estadual do Piauí, Rua: João Cabral, N. 2231, P.O. Box 381, Teresina, PI 64002-150, Brazil., Dos Santos Costa G; Department of Chemistry PPGQ-GERATEC, Universidade Estadual do Piauí, Rua: João Cabral, N. 2231, P.O. Box 381, Teresina, PI 64002-150, Brazil., Estefany Brandão Lima A; Department of Chemistry PPGQ-GERATEC, Universidade Estadual do Piauí, Rua: João Cabral, N. 2231, P.O. Box 381, Teresina, PI 64002-150, Brazil., Eduardo da Luz Júnior G; Department of Chemistry PPGQ-GERATEC, Universidade Estadual do Piauí, Rua: João Cabral, N. 2231, P.O. Box 381, Teresina, PI 64002-150, Brazil., Longo E; Department of Chemistry of Materials, CDMF-Universidade Estadual Paulista, P.O. Box 355, Araraquara, SP 14801-907, Brazil., Santos Cavalcante L; Department of Chemistry PPGQ-GERATEC, Universidade Estadual do Piauí, Rua: João Cabral, N. 2231, P.O. Box 381, Teresina, PI 64002-150, Brazil., da Silva Santos R; Department of Chemistry PPGQ-GERATEC, Universidade Estadual do Piauí, Rua: João Cabral, N. 2231, P.O. Box 381, Teresina, PI 64002-150, Brazil.
Jazyk: angličtina
Zdroj: ChemPlusChem [Chempluschem] 2018 Dec; Vol. 83 (12), pp. 1153-1161.
DOI: 10.1002/cplu.201800534
Abstrakt: The effect of silver (Ag 0 ) and platinum (Pt 0 ) metallic nanoparticles (NPs) on WO 3 film was investigated by studying the photocurrent response under polychromatic irradiation. The structural phase revealed by X-ray diffraction analysis indicates a monoclinic crystal nanostructure. WO 3, Ag 0 /WO 3, and Pt 0 /WO 3 electrodes were used to degrade 0.35 mg L -1 progesterone hormone in aqueous solution under polychromatic irradiation for 3h. The studies on degradation were investigated under electrochemically assisted heterogeneous photocatalysis (EHP) conditions. For photodegradation of progesterone, higher performance was achieved when WO 3 was functionalized and when the EHP configuration was adopted with bias at +0.7 V vs Ag/AgCl. This study reveals that incorporation of metallic NPs onto a semiconductor increases its efficiency, thereby preventing electron-hole recombination in the photocatalyst and photoelectrochemical limitations of WO 3 due to surface plasmon resonance and the trapping state. Therefore, efficient advances in the degradation of organic contaminants during water treatment can be realized.
(© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.)
Databáze: MEDLINE
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