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This ultrafast synthesis route results in uniform and well\u2010crystallized WO<jats:sub>3<\/jats:sub> nanostructured films fully covering the substrates. A plate\u2010like hierarchical structure is observed at 150\u2009\u00b0C, and closely packed rectangular nanorods are formed at 180\u2009\u00b0C. For both temperatures, the nanostructures self\u2010organize into larger flower\u2010like structures. The increase of the synthesis time from 5 to 10\u2009min at 180\u2009\u00b0C results in thicker films, reaching \u22484\u2009\u03bcm. X\u2010ray diffraction (XRD) and Raman spectroscopy reveal that the films grow with the WO<jats:sub>3<\/jats:sub> orthorhombic crystalline phase (<jats:italic>o<\/jats:italic>\u2010WO<jats:sub>3<\/jats:sub>\u00b70.33H<jats:sub>2<\/jats:sub>O). Photoluminescence (PL) measurements are performed for all the films, and their optical bandgaps are estimated through diffuse reflectance spectroscopy. The WO<jats:sub>3<\/jats:sub> films have their photocatalytic activity assessed from rhodamine B (RhB) degradation under solar radiation. The Mott\u2013Schottky plots confirm the n\u2010type character of the films with the flat\u2010band potentials and electron concentrations being estimated for the best photocatalysts. This study associates the eco\u2010friendly, fast, and low\u2010cost aspects of the synthesis route to the production of highly photoactive materials, which can effectively contribute to environmental remediation.<\/jats:p><\/jats:sec>","DOI":"10.1002\/pssr.202100196","type":"journal-article","created":{"date-parts":[[2021,7,8]],"date-time":"2021-07-08T17:12:37Z","timestamp":1625764357000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":22,"title":["Ultrafast Microwave Synthesis of WO<sub>3<\/sub> Nanostructured Films for Solar Photocatalysis"],"prefix":"10.1002","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3115-6588","authenticated-orcid":false,"given":"Daniela","family":"Nunes","sequence":"first","affiliation":[{"name":"i3N\/CENIMAT, Department of Materials Science NOVA School of Science and Technology, Campus de Caparica  Caparica 2829-516 Portugal"}]},{"given":"Ana Rita","family":"Fragoso","sequence":"additional","affiliation":[{"name":"i3N\/CENIMAT, Department of Materials Science NOVA School of Science and Technology, Campus de Caparica  Caparica 2829-516 Portugal"}]},{"given":"Tomas","family":"Freire","sequence":"additional","affiliation":[{"name":"i3N\/CENIMAT, Department of Materials Science NOVA School of Science and Technology, Campus de Caparica  Caparica 2829-516 Portugal"},{"name":"AlmaScience Colab Madan Parque  Caparica 2829-516 Portugal"}]},{"given":"Mariana","family":"Matias","sequence":"additional","affiliation":[{"name":"i3N\/CENIMAT, Department of Materials Science NOVA School of Science and Technology, Campus de Caparica  Caparica 2829-516 Portugal"},{"name":"AlmaScience Colab Madan Parque  Caparica 2829-516 Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6878-1040","authenticated-orcid":false,"given":"Ana Carolina","family":"Marques","sequence":"additional","affiliation":[{"name":"i3N\/CENIMAT, Department of Materials Science NOVA School of Science and Technology, Campus de Caparica  Caparica 2829-516 Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1997-7669","authenticated-orcid":false,"given":"Rodrigo Ferr\u00e3o de Paiva","family":"Martins","sequence":"additional","affiliation":[{"name":"i3N\/CENIMAT, Department of Materials Science NOVA School of Science and Technology, Campus de Caparica  Caparica 2829-516 Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4202-7047","authenticated-orcid":false,"given":"Elvira","family":"Fortunato","sequence":"additional","affiliation":[{"name":"i3N\/CENIMAT, Department of Materials Science NOVA School of Science and Technology, Campus de Caparica  Caparica 2829-516 Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1236-9262","authenticated-orcid":false,"given":"Ana","family":"Pimentel","sequence":"additional","affiliation":[{"name":"i3N\/CENIMAT, Department of Materials Science NOVA School of Science and Technology, Campus de Caparica  Caparica 2829-516 Portugal"}]}],"member":"311","published-online":{"date-parts":[[2021,7,29]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1039\/C4CS00126E"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1039\/C3CS60378D"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1021\/cs400993w"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10853-015-9125-7"},{"key":"e_1_2_8_6_1","doi-asserted-by":"publisher","DOI":"10.1155\/2019\/6501923"},{"key":"e_1_2_8_7_1","doi-asserted-by":"publisher","DOI":"10.1039\/C8CY02375A"},{"key":"e_1_2_8_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.elecom.2005.10.034"},{"key":"e_1_2_8_9_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ceramint.2018.01.123"},{"key":"e_1_2_8_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.enmm.2019.100255"},{"key":"e_1_2_8_11_1","first-page":"12","volume":"17","author":"Hashimoto K.","year":"2007","journal-title":"Assoc. 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