A carbon nanotube (CNT)/gold nanoparticle (NP) nanocomposite was synthesized by simultaneously reducing the Au ions and depositing Au NPs on the surface of a CNT. The functional groups were investigated with Fourier transform infrared spectra. From the Raman spectra, the D-band and G-band of the CNT were identified. The deposition of nanometer-sized Au NPs on the CNT sites was observed by transmission electron microscopy. The photodegradation of methylene blue (MB) in aqueous solutions was studied using various photocatalysts, including TiO2, TiO2-SiO2, CNT/TiO2, CNT/TiO2-SiO2, Au/TiO2, CNT-Au/TiO2, and CNT-Au/TiO2-SiO2 composites. CNT addition leads to a synergic effect, improving the photoactivity of the catalysts. A possible physically based mechanism was proposed involving the reduction of electron-hole recombination and fast electron-transfer possibility.

Effect of carbon nanotubes and carbon nanotubes/gold nanoparticles composite on the photocatalytic activity of TiO2 and TiO2-SiO2 / Chinh, Vu Duc; Hung, Le Xuan; Di Palma, Luca; Hanh, Vu Thi Hong; Vilardi, Giorgio. - In: CHEMICAL ENGINEERING & TECHNOLOGY. - ISSN 0930-7516. - 42:2(2019), pp. 308-315. [10.1002/ceat.201800265]

Effect of carbon nanotubes and carbon nanotubes/gold nanoparticles composite on the photocatalytic activity of TiO2 and TiO2-SiO2

Di Palma, Luca;Vilardi, Giorgio
Ultimo
2019

Abstract

A carbon nanotube (CNT)/gold nanoparticle (NP) nanocomposite was synthesized by simultaneously reducing the Au ions and depositing Au NPs on the surface of a CNT. The functional groups were investigated with Fourier transform infrared spectra. From the Raman spectra, the D-band and G-band of the CNT were identified. The deposition of nanometer-sized Au NPs on the CNT sites was observed by transmission electron microscopy. The photodegradation of methylene blue (MB) in aqueous solutions was studied using various photocatalysts, including TiO2, TiO2-SiO2, CNT/TiO2, CNT/TiO2-SiO2, Au/TiO2, CNT-Au/TiO2, and CNT-Au/TiO2-SiO2 composites. CNT addition leads to a synergic effect, improving the photoactivity of the catalysts. A possible physically based mechanism was proposed involving the reduction of electron-hole recombination and fast electron-transfer possibility.
carbon nanotube; gold nanoparticle; nano-photocatalysts; TiO2; TiO2-SiO2; chemistry (all); chemical engineering (all); industrial and manufacturing engineering
01 Pubblicazione su rivista::01a Articolo in rivista
Effect of carbon nanotubes and carbon nanotubes/gold nanoparticles composite on the photocatalytic activity of TiO2 and TiO2-SiO2 / Chinh, Vu Duc; Hung, Le Xuan; Di Palma, Luca; Hanh, Vu Thi Hong; Vilardi, Giorgio. - In: CHEMICAL ENGINEERING & TECHNOLOGY. - ISSN 0930-7516. - 42:2(2019), pp. 308-315. [10.1002/ceat.201800265]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1223788
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