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http://hdl.handle.net/10773/24933
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DC Field | Value | Language |
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dc.contributor.author | Maltanava, Hanna | pt_PT |
dc.contributor.author | Poznyak, Sergey | pt_PT |
dc.contributor.author | Ovodok, Evgeni | pt_PT |
dc.contributor.author | Ivanovskaya, Maria | pt_PT |
dc.contributor.author | Maia, Frederico | pt_PT |
dc.contributor.author | Kudlash, Alexander | pt_PT |
dc.contributor.author | Scharnagl, Nico | pt_PT |
dc.contributor.author | Tedim, João | pt_PT |
dc.date.accessioned | 2018-12-18T12:26:10Z | - |
dc.date.issued | 2018 | - |
dc.identifier.uri | http://hdl.handle.net/10773/24933 | - |
dc.description.abstract | Mesoporous ZnO materials have been synthesized through chemical deposition of different precursors from aqueous or water-ethanol solutions followed by their thermal decomposition at 400°C in air. The microstructure and morphology of the precursors and obtained ZnO powders were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM) and nitrogen adsorption-desorption (BET) methods. The structure of the precursor and physico-chemical properties of final zinc oxide powders were shown to be considerably influenced by the presence of Cl– ions and ethanol in solution. In water-ethanol solutions, Zn5(OH)8Cl2∙H2O or Zn5(OH)8(NO3)2∙(H2O)2 precursors are formed, while ZnO particles are directly deposited from aqueous solution. The photocatalytic activity of the synthesized ZnO materials was evaluated by the decolorization of Rhodamine B (RhB) upon UV irradiation. The ZnO powders have demonstrated high photocatalytic efficiency, enabling decomposition of 81.497.4 % RhB within 3 hours. The increased photocatalytic efficiency of ZnO prepared by annealing of Zn5(OH)8Cl2∙H2O precursor or deposited directly from aqueous chloride-containing solutions can be originated from the presence of Cl-containing compounds remaining after thermal treatment of simonkolleite as well as from introduction of Cl-dopant in ZnO. | pt_PT |
dc.language.iso | eng | pt_PT |
dc.publisher | Elsevier | pt_PT |
dc.relation | info:eu-repo/grantAgreement/EC/H2020/645662/EU | pt_PT |
dc.rights | openAccess | pt_PT |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | pt_PT |
dc.subject | Zinc oxide | pt_PT |
dc.subject | Simonkolleite | pt_PT |
dc.subject | Chemical precipitation | pt_PT |
dc.subject | Photocatalysis | pt_PT |
dc.title | Synthesis of ZnO mesoporous powders and their application in dye photodegradation | pt_PT |
dc.type | article | pt_PT |
dc.description.version | published | pt_PT |
dc.peerreviewed | yes | pt_PT |
degois.publication.firstPage | 17414 | pt_PT |
degois.publication.issue | 9 | pt_PT |
degois.publication.lastPage | 17421 | pt_PT |
degois.publication.title | Materials Today: Proceedings | pt_PT |
degois.publication.volume | 5 | pt_PT |
dc.date.embargo | 2019-08-29 | - |
dc.identifier.doi | 10.1016/j.matpr.2018.06.043 | pt_PT |
dc.identifier.essn | 2214-7853 | pt_PT |
Appears in Collections: | CICECO - Artigos |
Files in This Item:
File | Description | Size | Format | |
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manuscript ID3- 2017Materials Today Proceedings.pdf | 705.26 kB | Adobe PDF | View/Open |
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