20.500.12556/DKUM-56263 Synthesis of Au nanoparticles prepared with ultrasonic spray pyrolysis and hydrogen reduction Sinteza Au-nanodelcev, pripravljenih z ultrazvočno razpršilno pirolizo in redukcijo z vodikom Golden nanoparticles of different sizes and shapes (spherical, cylindrical, triangular and round) where prepared during a synthesis of gold with ultrasonic spray pyrolysis (USP) and hydrogen reduction. The experimental investigations of the (USP) method were performed with an ultrasonic source of 0.8 MHz and 2.5 MHz, acting on the water solution of HAuCl4 forming aerosols with micron-sized and nanosized droplets. The results of the investigation show that the final shape and size of the Au particles depend on the characteristics of the solution and the frequency of the ultrasound. The second step of synthesizing the Au nanoparticles includes the subsequent thermal decomposition of the aerosol droplets in a hydrogen atmosphere between 260°C and 500°C. The investigations showed that the Au nanoparticles prepared in this way are smaller and more homogeneous. Zlate nanodelce različnih velikosti in oblik (sferični, cilindrični, trikotni in okrogli) smo pripravili s sintezo zlata z uporabo ultrazvočne razpršilne pirolize (USP) in redukcije. Eksperimentalne raziskave USP-metode so bile izvedene z ultrazvočnim izvirom s frekvenco med 0,8 MHz in 2,5 MHz z delovanjem na vodno raztopino HAuCl4, kjer je prišlo do formiranja aerosolov z mikro- in nanovelikostjo kapljic. Rezultati preiskav kažejo, da je oblika in velikost nastalih Au-delcev odvisna od karakteristik raztopine in od frekvence ultrazvoka. Drugi proces sinteze Au-nanodelcev je vključeval kasnejšo toplotno dekompozicijo kapljic aerosola. Izveden je bil v vodikovi atmosferi med 260°C in 500°C. Preiskave so pokazale, da so tako izdelani Au-delci bolj homogeni in manjši. gold ultrasonic spray pyrolysis reduction nanoparticles zlato ultrazvočna razpršilna piroliza redukcija nanodelci true false true Angleški jezik Slovenski jezik Znanstveno delo 2015-12-21 16:59:39 2015-12-21 16:59:39 2022-06-11 03:09:00 2022-03-30 03:08:53 2013 0 0 str. 577-583 št. 5 Letn. 47 sep.-okt. 2013 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1580-2949 669.21:620.3:66.017 106193664 17274390 1580-2949 URN:SI:UM:DK:AMKJOBJ5 Materiali_in_tehnologije_2013_Stopic_et_al._Synthesis_of_Au_Nanoparticles_Prepared_With_Ultrasonic_Spray_Pyrolysis_and_Hydrogen_Reductio.pdf Materiali_in_tehnologije_2013_Stopic_et_al._Synthesis_of_Au_Nanoparticles_Prepared_With_Ultrasonic_Spray_Pyrolysis_and_Hydrogen_Reductio.pdf 1 91DE512173CD3CBCBB627B8F4C977E34 2d4febfef2da597cd68bb34afceda16a21c1b2416cbb83ba50b1637fe68f66c0 02fe064a-7c0e-11eb-bb7a-00155d0001ca https://dk.um.si/Dokument.php?lang=slv&id=110076 http://mit.imt.si/Revija/izvodi/mit135/stopic.pdf 1 https://dk.um.si/Dokument.php?lang=slv&id=110077 Fakulteta za strojništvo 0 0 0