Advanced search
Start date
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Photocurrent Response and Progesterone Degradation by Employing WO3 Films Modified with Platinum and Silver Nanoparticles

Full text
dos Santos Costa, Maria Joseita [1] ; Costa, Gilson dos Santos [1] ; Brandao Lima, Aline Estefany [1] ; da Luz Junior, Geraldo Eduardo [1] ; Longo, Elson [2] ; Cavalcante, Laecio Santos [1] ; Santos, Reginaldo da Silva [1]
Total Authors: 7
[1] Univ Estadual Piaui, PPGQ GERATEC, Dept Chem, Rua Joao Cabral 2231, POB 381, BR-64002150 Teresina, PI - Brazil
[2] Univ Estadual Paulista, CDMF, Dept Chem Mat, POB 355, BR-14801907 Araraquara, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: CHEMPLUSCHEM; v. 83, n. 12, p. 1153-1161, DEC 2018.
Web of Science Citations: 0

The effect of silver (Ag-0) and platinum (Pt-0) metallic nanoparticles (NPs) on WO3 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. WO3, Ag-0/WO3, and Pt-0/WO3 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 WO3 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 WO3 due to surface plasmon resonance and the trapping state. Therefore, efficient advances in the degradation of organic contaminants during water treatment can be realized. (AU)

FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC