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Priprava in karakterizacija poliHIPE nosilcev s kristali srebra
ID Božič, Benjamin (Author), ID Podgornik, Aleš (Mentor) More about this mentor... This link opens in a new window

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Abstract
Polimerni materiali poliHIPE so tvorjeni iz emulzij z visokim deležem notranje faze. PoliHIPE materiali, ki vključujejo glicidil metakrilat so primerni za nadaljnjo funkcionalizacijo, zaradi na njem prisotne epoksi skupine. Posledično lahko polimer funkcionaliziramo z aldehidnimi skupinami ali pa s kvartarnim amonijevim kationom. Aldehidne skupine lahko služijo kot reducent za tvorbo nanodelcev z uporabo Tollensovega reagenta. Magistrsko delo prikazuje vpliv različnih parametrov in njihovih posledic na ta postopek. Kvartarni amonijev kation pa lahko služi za imobilizacijo srebrovih nanoploščic. V delu je predstavljeno, kako z dodajanjem vodikovega peroksida vplivamo na končno obliko srebrovih nanoploščic. Prikazan je tudi vpliv njihove velikost na površinsko plazmonsko resonanco. Srebrove nanoploščice so bile nato naložene na poliHIPE vzorce, ki so bili funkcionalizirani z različnimi koncentracijami kvartarnega amonijevega kationa in v delu vidimo, kako na imobilizacijo vplivajo razlike v njegovi koncentraciji. Preučena je bila kataliza reakcije, kjer reduciramo 4-nitrofenol v 4-aminofenol z uporabo na oba načina pripravljenih nanodelcev. Raziskana je bila tudi v heterogeni katalizi zelo pomembna stabilnost katalizatorjev.

Language:Slovenian
Keywords:srebrovi nanodelci, poliHIPE, 4-nitrofenol
Work type:Master's thesis/paper (mb22)
Typology:2.09 - Master's Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Technology
Year:2022
PID:20.500.12556/RUL-136671 This link opens in a new window
COBISS.SI-ID:108497411 This link opens in a new window
Publication date in RUL:13.05.2022
Views:77
Downloads:17
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Secondary language

Language:English
Title:Preparation and characterization of polyHIPE supports with silver crystals
Abstract:
PolyHIPE materials are polymers, which are formed by polymerization of high internal phase emulsions. PolyHIPEs that contain glycidyl methacrylate can be functionalized due to epoxy groups it possesses. To give an example, polymer can be consequently functionalized with aldehyde groups and quaternary amine cation. Aldehyde groups can be used as reducing agent when forming nanoparticles using Tollens’ reagent and this masters’ thesis presents this procedure’s different parameters and their influence. Quaternary amine cation can be used for immobilizing silver nanoplates. This thesis presents how by addition of hydrogen peroxide the shape of silver nanoplates can be influenced. The thesis also explores the influence of silver nanoplate’s size and shape on surface plasmon resonance. Silver nanoplates were immobilized od polyHIPE samples, which were functionalized with different concentrations of quaternary amine cation and this thesis shows, how those differences influence the immobilization. The catalytic reaction in which 4-nitrophenol is reduced to 4-aminophenol was explored by using composites involving nanoparticles produced by Tollen’s reagent and nanoplates produced with hydrogen peroxide, respectively. The stability of prepared samples was also explored as it is very important in heterogeneous catalysis.

Keywords:silver nanoparticles, polyHIPE, 4-nitrophenol

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