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@article{2352438,
author = {Dubravova, Alzbeta and Muchova, Monika and Skoda, David and Lovecka, Lenka and Šimoníková, Lucie and Kuritka, Ivo and Vicha, Jan and Munster, Lukas},
article_location = {OXFORD},
article_number = {JAN},
doi = {http://dx.doi.org/10.1016/j.carbpol.2023.121435},
keywords = {Gold nanoparticles; Dialdehyde cellulose; Chitosan; Nanofibers; Electrospinning; Catalysis},
language = {eng},
issn = {0144-8617},
journal = {Carbohydrate Polymers},
title = {Highly efficient affinity anchoring of gold nanoparticles on chitosan nanofibers via dialdehyde cellulose for reusable catalytic devices},
url = {https://www.sciencedirect.com/science/article/pii/S0144861723009001?via%3Dihub},
volume = {323},
year = {2024}
}
TY - JOUR
ID - 2352438
AU - Dubravova, Alzbeta - Muchova, Monika - Skoda, David - Lovecka, Lenka - Šimoníková, Lucie - Kuritka, Ivo - Vicha, Jan - Munster, Lukas
PY - 2024
TI - Highly efficient affinity anchoring of gold nanoparticles on chitosan nanofibers via dialdehyde cellulose for reusable catalytic devices
JF - Carbohydrate Polymers
VL - 323
IS - JAN
SP - 121435
EP - 121435
PB - ELSEVIER SCI LTD
SN - 01448617
KW - Gold nanoparticles
KW - Dialdehyde cellulose
KW - Chitosan
KW - Nanofibers
KW - Electrospinning
KW - Catalysis
UR - https://www.sciencedirect.com/science/article/pii/S0144861723009001?via%3Dihub
N2 - Polysaccharides are often utilized as reducing and stabilizing agents and as support in the synthesis of gold nanoparticles (AuNPs). However, using approaches like spin coating or dip coating, AuNPs are generally bound to the support only by weak interactions, which can lead to decreased stability of the composite. Here, a twostage approach for the preparation of composites with covalently anchored AuNPs is proposed. First, 5 nm AuNPs with high catalytic activity for the reduction of 4-nitrophenol (TOF = 15.8 min-1) were synthesized and stabilized using fully oxidized and solubilized 2,3-dialdehyde cellulose (DAC). Next, the carbonyl groups in the shell of prepared nanoparticles were used to tether AuNPs to chitosan nanofibers with quantitative efficacy in a process that we termed "affinity anchoring". Schiff bases formed during this process were subsequently reduced to secondary amines by borohydride, which greatly improved the stability of the composite in the broad pH range from 3 to 9. The catalytic efficacy of the resulting composite is demonstrated using a model catalytic device, showing high stability, fast conversion rates, and direct reusability.
ER -
DUBRAVOVA, Alzbeta, Monika MUCHOVA, David SKODA, Lenka LOVECKA, Lucie ŠIMONÍKOVÁ, Ivo KURITKA, Jan VICHA a Lukas MUNSTER. Highly efficient affinity anchoring of gold nanoparticles on chitosan nanofibers via dialdehyde cellulose for reusable catalytic devices. \textit{Carbohydrate Polymers}. OXFORD: ELSEVIER SCI LTD, 2024, roč.~323, JAN, s.~121435-121446. ISSN~0144-8617. Dostupné z: https://dx.doi.org/10.1016/j.carbpol.2023.121435.
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