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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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