magistrsko delo
Abstract
PoliHIPE materiali, so porozni polimeri, ki jih dobimo z mešanjem dveh nemešljivih tekočin, kjer je ena izmed tekočin dispergirana v drugo v obliki kapljic. Delež notranje faze mora predstavljati vsaj 74% vol celotne emulzije. Prednosti teh materialov se kažejo pri separacijskih procesih, katalitskim reakcijah, biomedicini in mikroelektroniki. Z magistrskim delom smo želeli primerjati katalitsko aktivnost poliHIPE nosilcev prekritih s srebrnimi nanoploščicami (srebrovi poliHIPE nosilci) z enakimi vzorci, na katere pa je bilo z galvansko izmenjavo odloženo zlato. Kot modelno reakcijo smo uporabili redukcijo 4-nitrofenola. Po uspešni sintezi poliHIPE vzorcev in koloidne raztopine srebrovih nanoploščic, smo na vzorce s pomočjo črpalke naložili srebrove nanoploščice. Dobljene vzorce smo karakterizirali in preverili njihovo katalitsko aktivnost. Nato smo skozi vzorce z že naloženimi srebrnimi nanoploščicami prečrpali še raztopino HAuCl4. Vzorcem smo nato še enkrat preverili katalitsko aktivnost in z analizami ugotovili, da vzorci z dodatkom zlata bolje katalizirajo reakcijo, v primerjavi s srebrovimi nanoploščicami.
Keywords
porozni materiali;poliHIPE;srebrove nanoploščice;katalitske reakcije;redukcija 4-nitrofenola;tetrakloroaurična kislina;magistrska dela;
Data
Language: |
Slovenian |
Year of publishing: |
2023 |
Typology: |
2.09 - Master's Thesis |
Organization: |
UL FKKT - Faculty of Chemistry and Chemical Technology |
Publisher: |
[M. Travica] |
UDC: |
678:620.3(043.2) |
COBISS: |
172645379
|
Views: |
54 |
Downloads: |
5 |
Average score: |
0 (0 votes) |
Metadata: |
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Other data
Secondary language: |
English |
Secondary title: |
Synthesis and characterization of silver nanoparticles on polyHIPE support |
Secondary abstract: |
PolyHIPE materials are porous polymers obtained by mixing two immiscible liquids, where one is dispersed into the other in the form of droplets. Internal phase must constitute from at least 74% of volume of the total emulsion. The advantages of these materials are shown in separation processes, catalytic reactions, biomedicine, and microelectronics. In master’s thesis, we aimed to compare the catalytic activity of silver-coated polyHIPE supports with the same samples onto which gold was deposited by galvanic replacement. We used the reduction of 4-nitrophenol as a model reaction. After successfully synthesizing polyHIPE samples and a colloidal solution of silver nanoplates, we deposited silver nanoplate on samples using a pump. We also characterized the obtained samples and verified their catalytic activity. After that we pumped a solution of HAuCl4 through samples, that already contained silver nanoplates. We subsequently re-evaluated the catalytic activity of the samples through analyses. Samples, with addition of gold performed better catalytic activity compared to samples with silver nanoplates only. |
Secondary keywords: |
polyHIPE;silver nanoparticles;reduction of 4-nitrophenol;chloroauric acid;Polimeri;Nanodelci;Univerzitetna in visokošolska dela; |
Type (COBISS): |
Master's thesis/paper |
Study programme: |
1000376 |
Embargo end date (OpenAIRE): |
1970-01-01 |
Thesis comment: |
Univ. v Ljubljani, Fak. za kemijo in kemijsko tehnologijo, smer Kemijsko inženirstvo |
Pages: |
47 str. |
ID: |
19987783 |