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Influence of nanoscale defects on the improvement of photocatalytic activity of Ag/ZnO
dc.creator | Muñoz-Fernandez, Lidia | |
dc.creator | Gómez-Villalba, Luz Stella | |
dc.creator | Milošević, Olivera | |
dc.creator | Rabanal, Maria Eugenia | |
dc.date.accessioned | 2022-12-21T14:29:54Z | |
dc.date.available | 2022-12-21T14:29:54Z | |
dc.date.issued | 2022 | |
dc.identifier.issn | 1044-5803 | |
dc.identifier.uri | https://dais.sanu.ac.rs/123456789/13517 | |
dc.description.abstract | This study presents the advances in the field of ZnO/Ag catalysts from the synthesis of hierarchical ZnO nanowires (NWs) decorated with Ag nanoparticles, prepared by a facile solvothermal method at 120°C. It evaluates the photocatalytic efficiency from studying the time reaction of Ag/Zn concentration ratio and the presence of cetyltrimethylammonium bromide (CTAB) as an organic dispersant. X-ray diffraction, scanning electron microscopy, and analytical/high-resolution transmission electron microscopy results confirmed the presence of homogeneous cylindrical ZnO nanowires and quasi-spherical Ag crystals. ZnO NWs exhibited hexagonal wurtzite structure and cubic FCC symmetry in Ag nanoparticles (NPS). Two types of nanostructures, including homogeneous cylindrical ZnO NWs in the absence of Ag and simultaneous presence of ZnO NWs and Ag NPs, formed depending on experimental conditions. The photocatalytic activity was evaluated by studying methylene blue (MB) degradation time under UV light excitation. Diffuse reflectance UV–Vis spectrophotometry (UV–Vis DRS) allowed identifying the ZnO absorption band at ~393 nm. Crystal size varied depending on the reaction time and the addition of CTAB. Synthesis time increased bandgap values, getting better photocatalytic performance in samples synthesized in intermediate times (6 h), higher Ag+/Zn2+ molar ratio (0.2/1.0), and CTAB. According to HRTEM observations, the presence of silver nanocrystals with high content of defects (twinning, stacking faults) could play an essential role in the photocatalytic response. In this context, the specific synthesis conditions of Ag/ZnO might be more appropriate for their use in organic dyes degradation in water and the potential use in protective treatments against materials biodeterioration processes. © 2022 The Authors | |
dc.relation | Innovation and Education Ministry of Spain (ref. MAT2013-47460-C5-5-P and MAT2016-80875-C3-3-R) | |
dc.relation | Autonomous Region Program of Madrid (ref. S2018/NMT-4411 and S2013/MIT-2862) | |
dc.relation | Geomateriales 2 program (S2013/MIT_2914) | |
dc.relation | TOP Heritage (P2018/NMT-4372) of the Community of Madrid | |
dc.relation | Innovation and Education Ministry (MAT201347460-C5-5-P) | |
dc.relation | info:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172035/RS// | |
dc.relation | info:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45020/RS// | |
dc.rights | openAccess | |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/4.0/ | |
dc.source | Materials Characterization | |
dc.subject | Molar ratio | |
dc.subject | Zinc sulfide | |
dc.subject | Scanning electron microscopy | |
dc.subject | Nanowires | |
dc.subject | II-VI semiconductors | |
dc.subject | Aromatic compounds | |
dc.subject | ZnO nanowires | |
dc.subject | photocatalysis | |
dc.subject | photocatalytic activity | |
dc.subject | synthesis (chemical) | |
dc.subject | high resolution transmission electron microscopy | |
dc.subject | metal nanoparticles | |
dc.subject | photocatalytic efficiency | |
dc.subject | cetyltrimethylammonium bromide | |
dc.subject | ZnO nanoparticles | |
dc.subject | silver nanoparticles | |
dc.subject | Ag/ZnO | |
dc.subject | nanocatalysts | |
dc.subject | solvothermal method | |
dc.subject | concentration ratio | |
dc.subject | Ag catalysts | |
dc.subject | nanoscale defects | |
dc.subject | nanostructured system | |
dc.subject | nanostructured systems | |
dc.title | Influence of nanoscale defects on the improvement of photocatalytic activity of Ag/ZnO | |
dc.type | article | en |
dc.rights.license | BY-NC-ND | |
dc.citation.volume | 185 | |
dc.identifier.wos | 000766146900005 | |
dc.identifier.doi | 10.1016/j.matchar.2021.111718 | |
dc.identifier.scopus | 2-s2.0-85123033953 | |
dc.type.version | publishedVersion | |
dc.identifier.fulltext | http://dais.sanu.ac.rs/bitstream/id/53959/Munoz-Fernandez_Materials-Characterization_2022.pdf | |
dc.identifier.rcub | https://hdl.handle.net/21.15107/rcub_dais_13517 |