20.500.12556/RUL-150863 Priprava in karakterizacija srebrovih poliHIPE nosilcev Synthesis and characterization of silver nanoparticles on polyHIPE support 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. 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. poliHIPE srebrovi nanodelci redukcija 4-nitrofenola HAuCl4 polyHIPE silver nanoparticles reduction of 4-nitrophenol HAuCl4 true false false Slovenski jezik Angleški jezik Magistrsko delo/naloga 2023-09-25 09:40:01 2023-09-25 09:40:05 2023-11-17 13:37:01 0000-00-00 00:00:00 2023 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 22042 172645379 Travica_Marko_-_Priprava_in_karakterizacija_srebrovih_poliHIPE_nosilcev.pdf Travica_Marko_-_Priprava_in_karakterizacija_srebrovih_poliHIPE_nosilcev.pdf 1 44D1F318FDA3584CBCF3D55FAD470FE6 de5639f8cfe5cbc6175a6562a29b262e0e67c3f22983921b6bf912f8dd877666 beaec0dd-5b76-11ee-be43-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=175680 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0