RT Journal Article
T1 Improving sustainability of cellulose nanofibrils production: FTIR spectroscopy for online control of the synthesis of recyclable magnetic TEMPO catalyst
A1 Xu, Hongyu
A1 Balea Martín, Ana
A1 Merayo, Noemí
A1 Martínez, Ainhoa
A1 Negro Álvarez, Carlos Manuel
AB 2,2,6,6-tetramethylpiperidine-N-oxyl (TEMPO) and its derivatives are well-established catalysts for various oxidation processes, despite its hazardous nature, causing harm to aquatic ecosystems. Thus, the reuse of TEMPO with a sustained high activity has gained significant importance for its industrial application, which has led to the development of supported TEMPO catalyst. In this context, the efficiency of the support process acquires high relevance. Therefore, this research is aimed at the improvement of the TEMPO supported on silica magnetically modified with Fe3O4 through the application of an online Fourier transform infrared spectroscopy (FTIR) probe to monitor its synthesis. FTIR effectively controlled the synthesis of supported TEMPO, by tracking online the concentration of 3-aminopropyltriethoxysilane (APTES) and tetraethyl orthosilicate (TEOS). Additionally, the presence of Fe3O4 particles in the core of the catalyst allowed its convenient recovery and subsequent reuse. Furthermore, the supported TEMPO catalyst was successfully applied in the oxidation of cellulose to produce nano/microfibrils. The carboxyl groups of the initial untreated cellulose increase from 0.05 mmol/g to 0.68 mmol/g with the supported TEMPO catalyst in presence of sodium hypochlorite and sodium bromide at 50 °C
PB Elsevier
SN 2666-8939
YR 2024
FD 2024-06
LK https://hdl.handle.net/20.500.14352/105194
UL https://hdl.handle.net/20.500.14352/105194
LA eng
NO Xu, H.; Balea, A.; Merayo, N.; Martínez, A.; Negro, C. Improving Sustainability of Cellulose Nanofibrils Production: FTIR Spectroscopy for Online Control of the Synthesis of Recyclable Magnetic TEMPO Catalyst. Carbohydrate Polymer Technologies and Applications 2024, 7, 100417. https://doi.org/10.1016/j.carpta.2023.100417
NO 2024 Acuerdo transformativo financiado por la CRUE
NO Ministerio de Ciencia e Innovación (España)
NO Comunidad de Madrid
DS Docta Complutense
RD 21 jul 2025