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

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.
Authors:
 [1] ;  [2] ;  [1] ;  [1] ; ;  [3]
  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. (Algeria)
  3. Université Mouloud MAMMERI de TiziOuzou, Département de Physique, Bastos (Algeria)
Publication Date:
OSTI Identifier:
22420799
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 62; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; DEPOSITION; GOLD; HYDROGEN; IRRADIATION; METHYLENE BLUE; NANOPARTICLES; NANOWIRES; PALLADIUM; PHOTOCATALYSIS; PLATINUM; SCANNING ELECTRON MICROSCOPY; SILICON; SUBSTRATES; SYNTHESIS; ULTRAVIOLET RADIATION