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TiO?@PEI-Grafted-MWCNTs Hybrids Nanocomposites Catalysts for CO? Photoreduction.

ABSTRACT: Anatase (TiO?) and multiwalled carbon nanotubes bearing polyethylenimine (PEI) anchored on their surface were hybridized in different proportions according to a sol-gel method. The resulting nanocomposites (TiO?@PEI-MWCNTs), characterized by BET, XRD, XPS, SEM, and UV techniques, were found efficient catalysts for CO? photoreduction into formic and acetic acids in water suspension and under visible light irradiation. PEI-grafted nanotubes co-catalysts are believed to act as CO? activators by forming a carbamate intermediate allowing to accomplish the first example in the literature of polyamines/nanotubes/TiO? mediated CO? photoreduction to carboxylic acids.

SUBMITTER: Fusco C 

PROVIDER: S-EPMC5849004 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature

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Anatase (TiO₂) and multiwalled carbon nanotubes bearing polyethylenimine (PEI) anchored on their surface were hybridized in different proportions according to a sol-gel method. The resulting nanocomposites (TiO₂@PEI-MWCNTs), characterized by BET, XRD, XPS, SEM, and UV techniques, were found efficient catalysts for CO₂ photoreduction into formic and acetic acids in water suspension and under visible light irradiation. PEI-grafted nanotubes co-catalysts are believed to act as CO₂ activators by for  ...[more]

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