20.500.12556/DKUM-92207 Synthesis of Ni/Y2O3 nanocomposite through USP and lyophilisation for possible use as coating The Ni/Y2O3 catalyst showed high catalytic activity. Based on this, the aim of this study was to create Ni/Y2O3 nanocomposites powder with two innovative technologies, Ultrasonic Spray Pyrolysis (USP) and lyophilisation. In the USP process, thermal decomposition of the generated aerosols in an N2/H2 reduction atmosphere caused a complete decomposition of the nickel (II) nitrate to elemental Ni, which became trapped on the formed Y2O3 nanoparticles. The Ni/Y2O3 nanocomposite particles were captured via gas washing in an aqueous solution of polyvinylpyrrolidone (PVP) in collection bottles. PVP was chosen for its ability to stabilise nano-suspensions and as an effective cryoprotectant. Consequently, there was no loss or agglomeration of Ni/Y2O3 nanocomposite material during the lyophilisation process. The Ni/Y2O3 nanocomposite powder was analysed using ICP-MS, SEM-EDX, and XPS, which showed the impact of different precursor concentrations on the final Ni/Y2O3 nanocomposite particle composition. In a final step, highly concentrated Ni/Y2O3 nanocomposite ink (Ni/Y2O3 > 0.140 g/mL) and test coatings from this ink were prepared by applying them on a white matte photo paper sheet. The reflection curve of the prepared Ni/Y2O3 nanocomposite coating showed a local maximum at 440 nm with a value of 39% reflection. Given that Ni is located on the surface of the Ni/Y2O3 nanocomposite in the elemental state and according to the identified properties, tests of the catalytic properties of this coating will be performed in the future. Ultrasonic Spray Pyrolysis (USP) lyophilisation Ni/Y2O3 nanocomposite characterisation coatings ultrazvočna razpršilna piroliza liofilizacija Ni/Y2O3 nanocompoziti karakterizacija premazi true false true MDPI Angleški jezik Slovenski jezik https://www.mdpi.com/journal/materials © 2022 by the authors Članek v reviji 2025-03-20 13:37:53 2025-03-20 13:37:53 2025-03-21 03:10:51 0000-00-00 00:00:00 2022 0 0 17 str. iss. 8 (2856) Vol. 15 April 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2022-02-26 2022-04-11 2022-04-13 669.2/.8:620.3 104836099 10.3390/ma15082856 1996-1944 materials-15-02856.pdf materials-15-02856.pdf 1 74E191571A5D09FB200739C5592A8481 dfe9903c91f4c4a50e284871fe03b46cdef5f1b2e9747fbf6135493daa6a287f 7b100e98-0588-11f0-9be3-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=189527 https://www.mdpi.com/1996-1944/15/8/2856 0 80e6f819-0588-11f0-9be3-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=189528 Fakulteta za strojništvo 0 0 0