Catalytic activity of silicon nanowires decorated with silver and copper nanoparticles

The paper reports on the elaboration of silicon nanowires decorated with silver (SiNWs-Ag NPs) or copper (SiNWs-Cu NPs) nanoparticles and the investigation of their catalytic properties for the reduction of 4-nitrophenol to 4-aminophenol. The SiNW arrays were produced through chemical etching of cry...

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Bibliographic Details
Published in:Semiconductor science and technology 2016-01, Vol.31 (1), p.14011
Main Authors: Amdouni, Sonia, Coffinier, Yannick, Szunerits, Sabine, Zaïbi, Mohammed Ali, Oueslati, Meherzi, Boukherroub, Rabah
Format: Article
Language:English
Subjects:
metal nanoparticles
nitrophenol reduction
silicon nanowires
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Summary:The paper reports on the elaboration of silicon nanowires decorated with silver (SiNWs-Ag NPs) or copper (SiNWs-Cu NPs) nanoparticles and the investigation of their catalytic properties for the reduction of 4-nitrophenol to 4-aminophenol. The SiNW arrays were produced through chemical etching of crystalline silicon in HF AgNO3 aqueous solution. The metal nanoparticles were deposited on the SiNW substrates through chemical bath immersion in a metal salt hydrofluoric acid aqueous solution. The SiNWs decorated with Ag NPs and Cu NPs were characterized by scanning electron microscopy (SEM), x-ray diffraction (XRD) and x-ray photoelectron spectroscopy (XPS). The catalytic activity of the SiNWs loaded with metal nanoparticles was evaluated for the reduction of 4-nitrophenol to 4-aminophenol in the presence of sodium borohydride (NaBH4). The substrates exhibited good catalytic performance toward nitrophenol with a full reduction in less than 30 s for the SiNWs-Cu NPs.
ISSN:0268-1242
1361-6641
DOI:10.1088/0268-1242/31/1/014011