TiO2@PEI-Grafted-MWCNTs Hybrids Nanocomposites Catalysts for CO2 Photoreduction
by
Caterina Fusco 1,*
, Michele Casiello 2, Lucia Catucci 2, Roberto Comparelli 3, Pietro Cotugno 2, Aurelia Falcicchio 4, Francesco Fracassi 2, Valerio Margiotta 3, Anna Moliterni 4, Francesca Petronella 3, Lucia D’Accolti 1,2,* and Angelo Nacci 1,2,*
Caterina Fusco 1,*, Michele Casiello 2, Lucia Catucci 2, Roberto Comparelli 3, Pietro Cotugno 2, Aurelia Falcicchio 4, Francesco Fracassi 2, Valerio Margiotta 3, Anna Moliterni 4, Francesca Petronella 3, Lucia D’Accolti 1,2,* and Angelo Nacci 1,2,*
1
ICCOM-CNR (Istituto di Chimica dei Composti OrganoMetallici-Consiglio Nazionale delle Ricerche), SS Bari, Via Orabona 4, 70126 Bari, Italy
2
Dipartimento di Chimica, Università di Bari “A. Moro”, Via Orabona 4, 70126 Bari, Italy
3
IPCF-CNR (Istituto per i Processi Chimico Fisici–Consiglio Nazionale delle Ricerche), SS Bari, Via Orabona 4, 70126 Bari, Italy
4
CNR-IC (Consiglio Nazionale delle Ricerche–Istituto di Cristallografia), Via Amendola 122/O, 70126 Bari, Italy
*
Authors to whom correspondence should be addressed.
Materials 2018, 11(2), 307; https://doi.org/10.3390/ma11020307
Received: 19 January 2018 / Revised: 13 February 2018 / Accepted: 13 February 2018 / Published: 20 February 2018
(This article belongs to the Special Issue Hard and Soft Hybrid Functional Materials)
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 forming a carbamate intermediate allowing to accomplish the first example in the literature of polyamines/nanotubes/TiO2 mediated CO2 photoreduction to carboxylic acids.
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MDPI and ACS Style
Fusco, C.; Casiello, M.; Catucci, L.; Comparelli, R.; Cotugno, P.; Falcicchio, A.; Fracassi, F.; Margiotta, V.; Moliterni, A.; Petronella, F.; D’Accolti, L.; Nacci, A. TiO2@PEI-Grafted-MWCNTs Hybrids Nanocomposites Catalysts for CO2 Photoreduction. Materials 2018, 11, 307.
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