A Graphene Acid - TiO2 Nanohybrid as Multifunctional Heterogeneous Photocatalyst for the Synthesis of 1,3,4-Oxadiazoles
Entity
UAM. Departamento de Química OrgánicaPublisher
American Chemical SocietyDate
2022-07-25Citation
10.1021/acsami.2c07880
ACS Applied Materials & Interfaces 14.30 (2022): 34975−34984
ISSN
1944-8244 (print); 1944-8252 (online)DOI
10.1021/acsami.2c07880Funded by
Financial support was provided by the Spanish Government (RTI2018-095038-B-I00), FotoaArt “Comunidad de Madrid”, and European Structural Funds (S2018/NMT-4367) proyectos sinérgicos I+D (Y2020/NMT-6469) and Comunidad Autónoma de Madrid (SI1/PJI/2019-00237). M.B. and M.B. thank the Spanish MICINN for the Juan de la Cierva Incorporación contracts (IJC2019-042157-I and IJC2019- 042430-I). We also acknowledge the electron microscopy analysis from CNME. This work was supported by the national project NovaCO2 (PID2020-118593RB-C22) funded by MCIN/AEI/10.13039/501100011033Project
Comunidad de Madrid. SI1/PJI/2019-00237; Gobierno de España. PID2020-118593RB-C22; Gobierno de España. AEI/10.13039/501100011033Editor's Version
https://doi.org/10.1021/acsami.2c07880Subjects
Electronic communication; Graphene acid; Oxadiazoles; Photocatalysis; TiO 2; QuímicaRights
© 2022 American Chemical SocietyAbstract
The immobilization of TiO2 nanoparticles on
graphene acid (GA), a conductive graphene derivative densely
functionalized with COOH groups, is presented. The interaction
between the carboxyl groups of the surface and the titanium
precursor leads to a controlled TiO2 heterogenization on the
nanosheet according to microscopic and spectroscopic characterizations. Electronic communication shared among graphene and
semiconductor nanoparticles shifts the hybrid material optical
features toward less energetic radiation but maintaining the conductivity. Therefore, GA-TiO2 is employed as heterogeneous
photocatalyst for the synthesis of 2,5-disubstituted 1,3,4-oxadiazoles using ketoacids and hydrazides as substrates. The material
presented enhanced photoactivity compared to bare TiO2, being able to yield a large structural variety of oxadiazoles in reaction
times as fast as 1 h with full recyclability and stability. The carbocatalytic character of GA is the responsible for the substrates
condensation and the GA-TiO2 light interaction ability is able to photocatalyze the cyclization to the final 1,3,4-oxadiazoles,
demonstrating the optimal performance of this multifunctional photocatalytic material
Files in this item
Google Scholar:Sciarretta, Martina
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Barawi, Mariam
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Navío Bernabeu, Cristina
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De La Peña O. Shea, Víctor A.
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Blanco Fernández, Matías
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Alemán Lara, José Julián
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