Pilot preparation study of gold nanoparticle-chitosan composite catalyst

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F24%3A63579600" target="_blank" >RIV/70883521:28610/24:63579600 - isvavai.cz</a>

Result on the web

<a href="https://www.confer.cz/nanocon/2023/4776-pilot-preparation-study-of-gold-nanoparticle-chitosan-composite-catalyst" target="_blank" >https://www.confer.cz/nanocon/2023/4776-pilot-preparation-study-of-gold-nanoparticle-chitosan-composite-catalyst</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.37904/nanocon.2023.4776" target="_blank" >10.37904/nanocon.2023.4776</a>

Result language

angličtina

Original language name

Pilot preparation study of gold nanoparticle-chitosan composite catalyst

Original language description

The wide range of applications of AuNPs is related to their different shapes and sizes, which are dependent on the synthesis process and reaction parameters. Therefore, the optimization of a novel and highly efficient approach to chitosan substrate decoration by AuNPs via covalent bonding using dialdehyde cellulose (DAC) is presented here. The covalent binding of AuDAC to chitosan nanofibers is mediated by a Schiff base reaction. This improves particle binding compared to conventional methods such as simple dip coating where AuNPs bind to the substrate only via weak interaction. In this work, initial attempts for the preparation of a composite material based on mixing the AuDAC solution with a chitosan solution were conducted. However, this process was found to be inefficient due to the inhomogeneous morphology of the resulting material, i.e., the formation of irregular chitosan micro-nanofibers and sheets sparsely decorated with AuDAC. Therefore, an optimized approach based on the binding of pre-made AuDAC nanoparticles to electrospun chitosan nanofibers was utilized. This method showed high binding efficiency and very dense decoration of nanofibers with AuDAC opposed to method involving mixing of chitosan and AuDAC solutions. Subsequently, the ability of the composite material in the form of a thin filtration layer to catalytically reduce 4-nitrophenol (4NP) to 4-aminophenol (4AP) was demonstrated. The efficacy of binding AuNPs to nanofibers was also compared to nanoparticles synthesized using another type of polysaccharide, specifically hyaluronic acid dialdehyde (DAH).

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

21001 - Nano-materials (production and properties)

Project

<a href="/en/project/GA23-07361S" target="_blank" >GA23-07361S: Synthesis of gold nanoparticles for SERS and catalysis guided by selectively oxidized polysaccharides</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

NANOCON 2023 Conference Proceedings

ISBN

978-80-88365-15-0

ISSN

2694-930X

e-ISSN

—

Number of pages

6

Pages from-to

130-135

Publisher name

Tanger Ltd.

Place of publication

Ostrava

Event location

Brno

Event date

Oct 18, 2023

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

001234125400021