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Photocurrent Response and Progesterone Degradation by Employing WO 3 Films Modified with Platinum and Silver Nanoparticles
Author(s) -
Joseita dos Santos Costa Maria,
dos Santos Costa Gilson,
Estefany Brandão Lima Aline,
Eduardo da Luz Júnior Geraldo,
Longo Elson,
Santos Cavalcante Laécio,
da Silva Santos Reginaldo
Publication year - 2018
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201800534
Subject(s) - photocurrent , materials science , photodegradation , photocatalysis , surface plasmon resonance , monoclinic crystal system , platinum , photoelectrochemistry , platinum nanoparticles , aqueous solution , nanoparticle , photochemistry , noble metal , electrode , chemical engineering , nanotechnology , electrochemistry , metal , crystal structure , chemistry , catalysis , optoelectronics , crystallography , organic chemistry , engineering , metallurgy
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.