Enhanced photocatalytic degradation of methylene blue by metal-modified silicon nanowires

Journal Article · Sun Feb 15 04:00:00 EST 2015 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2014.11.007· OSTI ID:22420799

Menari, H. ^[1]; Amirouche, S.; El Kechai, O. ^[2]

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1. Centre de Recherche en Technologie des Semi-conducteurs pour l'Energétique (CRTSE), 2 Bd. Frantz Fanon, B.P. 140 Alger-7 Merveilles, Alger (Algeria)
2. Université Mouloud MAMMERI de TiziOuzou, Département de Physique, Bastos (Algeria)

Highlights: • SiNWs modified with Pd, Au and Pt were used as photocatalysts to degrade MB. • Yield of photodegardation increases with UV irradiation time. • SiNWs modified with Pd nanoparticles show the best photocatalytic activity. • A degradation of 97% was obtained after 200 min of UV irradiation. - Abstract: Silicon nanowires (SiNWs) modified with Au, Pt and Pd nanoparticles were used as heterogeneous photocatalysts for the photodegradation of methylene blue in water under UV light irradiation. The modification of SiNWs was carried out by deposition of metal nanoparticles using the electroless metal deposition (EMD) technique. The effect of metal nanoparticles deposition time on the photocatalytic activity was studied. It was found that the photocatalytic activity of modified SiNWs was enhanced when the deposition time of metal nanoparticles was increased. In addition of modified SiNWs with Pt, Au and Pd nanoparticles, oxidized silicon substrate (Ox-Si), oxidized silicon nanowires (Ox-SiNWs) and hydrogen-terminated silicon nanowires (H-SiNWs) were also evaluated for the photodegradation of methylene blue.

• OSTI ID: 22420799
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 62; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DEPOSITION
GOLD
HYDROGEN
IRRADIATION
METHYLENE BLUE
NANOPARTICLES
NANOWIRES
PALLADIUM
PHOTOCATALYSIS
PLATINUM
SCANNING ELECTRON MICROSCOPY
SILICON
SUBSTRATES
SYNTHESIS
ULTRAVIOLET RADIATION