@misc{10481/93863,
year = {2024},
month = {5},
url = {https://hdl.handle.net/10481/93863},
abstract = {Acid catalysis plays a pivotal role in the industrial landscape
due to its multifaceted contributions to various chemical
processes in numerous sectors, including petrochemicals,
polymers, food processing, and biodiesel production, among
others. Sulfonated graphenes hold notable relevance as heterogeneous
acid catalysts due to their unique combination of
graphene’s structural properties and the introduction of sulfonic
groups as catalytic acid sites. Herein, we report the preparation
of three sulfonated graphene-based materials – sulfonated
reduced graphene oxide (rGO-SO3H), chlorosulfonated reduced
graphene oxide (rGO-HSO3Cl) and sulfonated graphene oxide
(GO-SO3H) – by different synthetic approaches. Physicochemical,
textural, morphological, and acidic properties of all
materials were characterized in detail by different instrumental
techniques. Innovatively, these materials have been evaluated
as heterogeneous acid catalysts in the solketal synthesis by
acetalization of glycerol, which is considered an interesting
building block to produce added-value products. The density of
acidic active sites and hydrophobicity were found to be
conditioning parameters of the resulting catalytic activity in
terms of conversion and selectivity. The best catalytic performance
was obtained by rGO-SO3H, reaching the maximum
conversion towards solketal in 15 minutes under mild reaction
conditions. The reusability and stability of all materials were
also examined after three consecutive acetalization reactions
with only a slight loss of catalytic activity.},
organization = {Andalusian Regional Government (Project ProyExcel_00492 and
FQM-346 group)},
organization = {Feder Funds},
organization = {Spanish Ministry of Science and
Innovation (Mecanismo de Recuperación y Resiliencia de la
Unión Europea-Next Generation EU) for the projects PID2019-
104953RB-I00/MCIN/AEI/10.13039/501100011033, FEDER,UE,
PID2022/42657OB-I00/MCIN/AEI/10.13039/501100011033/FEDER,
UE, TED2021-132224B-I00/ NextGenerationEU/PRTR,
PID2022-142275OB-I00/MCIN /AEI /10.13039/501100011033/
FEDER,UE, and PDC2022-133973-I00/AEI/10.13039/
501100011033/FEDER,UE,},
organization = {Instituto
Químico para la Energía y el Medioambiente (IQUEMA)},
organization = {Servicios Centrales de Apoyo a la Investigación (SCAI) de la
Universidad de Córdoba (Spain)},
organization = {University Teacher Training (FPU) with reference
FPU17/03981 funded by Ministry of Science, Innovation and
Universities (Spanish Government)},
organization = {“Juan de la Cierva”
fellowship with reference JDC 2022–048903-I, funded by MCIN/
AEI/10.13039/ 501100011033 and the European Union “NextGenerationEU”/
PRTR”},
organization = {“Juan de la Cierva
– Incorporación” fellowship (IJC2020-045041-I), funded by
MCIN/AEI/10.13039/501100011033 and the European Union
“NextGenerationEU/PRTR”},
organization = {Plan Propio de Investigación
2023 de la Universidad de Córdoba (UCOLIDERA, OLIVE2BATTERY
project)},
organization = {Universidad de
Córdoba/CBUA},
publisher = {Wiley Online Library},
title = {Sulfonated Graphene-Based Materials as Heterogeneous Acid Catalysts for Solketal Synthesis by Acetalization of Glycerol},
doi = {10.1002/cctc.202400251},
author = {G. Gil-Gavilán, Dolores and Amaro Gahete, Juan and Rojas-Luna, Raúl and Benítez, Almudena and Estevez, Rafael and Esquivel, Dolores and Bautista, Felipa M. and Romero Salguero, Francisco J.},
}