Print Email Facebook Twitter Controlling the Morphology of Barrel-Shaped Nanostructures Grown via CuZn Electro-Oxidation Title Controlling the Morphology of Barrel-Shaped Nanostructures Grown via CuZn Electro-Oxidation Author Giziński, Damian (Military University of Technology) Mojsilović, Kristina (University of Belgrade) Brudzisz, Anna (Military University of Technology) Tiringer, U. (TU Delft Team Peyman Taheri) Vasilić, Rastko (University of Belgrade) Taheri, P. (TU Delft Team Peyman Taheri) Stępniowski, Wojciech J. (Military University of Technology) Date 2022 Abstract Herein, we report a feasible method for forming barrel-like hybrid Cu(OH)2-ZnO structures on α-brass substrate via low-potential electro-oxidation in 1 M NaOH solution. The presented study was conducted to investigate the electrochemical behavior of CuZn in a passive range (−0.2 V–0.5 V) and its morphological changes that occur under these conditions. As found, morphology and phase composition of the grown layer strongly depend on the applied potential, and those material characteristics can be tuned by varying the operating conditions. To the best of our knowledge, the yielded morphology of barrel-like structure has not been previously observed for brass anodizing. Additionally, photoactivity under both UV and daylight irradiation-induced degradation of organic dye (methyl orange) using Cu(OH)2-ZnO composite was explored. Obtained results proved photocatalytic activity of the material that led to degradation of 43% and 36% of the compound in UV and visible light, respectively. The role of Cu(OH)2 in improving ZnO photoactivity was recognized and discussed. As implied by both the undertaken research and the literature on the subject, cupric hydroxide can act as a trap for photoexcited electrons, and thus contributes to stabilizing electron-hole recombination. This resulted in improved light-absorbing properties of the photoactive component, ZnO. Subject brass passivationelectro-oxidationorganic dye photodegradationZnO-CuO nanostructures To reference this document use: http://resolver.tudelft.nl/uuid:0ae94875-4629-42d7-83bf-8035be77f0e3 DOI https://doi.org/10.3390/ma15113961 ISSN 1996-1944 Source Materials, 15 (11) Part of collection Institutional Repository Document type journal article Rights © 2022 Damian Giziński, Kristina Mojsilović, Anna Brudzisz, U. Tiringer, Rastko Vasilić, P. Taheri, Wojciech J. Stępniowski Files PDF materials_15_03961.pdf 2.46 MB Close viewer /islandora/object/uuid:0ae94875-4629-42d7-83bf-8035be77f0e3/datastream/OBJ/view