{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,17]],"date-time":"2026-02-17T02:41:39Z","timestamp":1771296099078,"version":"3.50.1"},"reference-count":57,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2022,3,27]],"date-time":"2022-03-27T00:00:00Z","timestamp":1648339200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","doi-asserted-by":"publisher","award":["SFRH\/BD\/132436\/2017"],"award-info":[{"award-number":["SFRH\/BD\/132436\/2017"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","doi-asserted-by":"publisher","award":["COVID\/BD\/151965\/2021"],"award-info":[{"award-number":["COVID\/BD\/151965\/2021"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","doi-asserted-by":"publisher","award":["UIDB\/00195\/2020"],"award-info":[{"award-number":["UIDB\/00195\/2020"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"name":"PIDDAC","award":["UIDB\/00195\/2020"],"award-info":[{"award-number":["UIDB\/00195\/2020"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>In this study, Bi-doped SrTiO3 perovskites (Sr1\u2212xBixTiO3, x = 0, 0.03, 0.05, 0.07 and 0.1) were synthesized using the solid-state method, characterized, and tested as photocatalysts in the degradation of the azo dye acid orange 7 (AO7) under visible light. The perovskites were successfully synthesized, and XRD data showed a predominant, well-crystallized phase, belonging to the cubic perovskite symmetry. For the doped samples, a minority phase, identified as bismuth titanate, was detected. All doped samples exhibited improved photocatalytic activity under visible light, on the degradation of AO7 (10 mg L\u22121), when compared with the undoped SrTiO3, with an increase in relative Abs484 nm decay from 3.7% to \u226567.8% after 1 h, for a powder suspension of 0.2 g L\u22121. The best photocatalytic activity was exhibited by the Sr0.95Bi0.05TiO3 perovskite. Reusability studies showed no significant loss in photocatalytic activity under visible light. The final solutions showed no toxicity towards D. magna, proving the efficiency of Sr0.95Bi0.05TiO3 as a visible-light-driven photocatalyst to degrade both the AO7 dye as well as its toxic by-products. A degradation mechanism is proposed.<\/jats:p>","DOI":"10.3390\/ma15072465","type":"journal-article","created":{"date-parts":[[2022,3,27]],"date-time":"2022-03-27T21:29:36Z","timestamp":1648416576000},"page":"2465","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":25,"title":["Visible-Light-Driven AO7 Photocatalytic Degradation and Toxicity Removal at Bi-Doped SrTiO3"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6245-5479","authenticated-orcid":false,"given":"Maria Jo\u00e3o","family":"Nunes","sequence":"first","affiliation":[{"name":"Fiber Materials and Environmental Technologies (FibEnTech-UBI), Universidade da Beira Interior, R. Marqu\u00eas de D\u2019\u00c1vila e Bolama, 6200-001 Covilh\u00e3, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4545-5784","authenticated-orcid":false,"given":"Ana","family":"Lopes","sequence":"additional","affiliation":[{"name":"Fiber Materials and Environmental Technologies (FibEnTech-UBI), Universidade da Beira Interior, R. Marqu\u00eas de D\u2019\u00c1vila e Bolama, 6200-001 Covilh\u00e3, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8268-6872","authenticated-orcid":false,"given":"Maria Jos\u00e9","family":"Pacheco","sequence":"additional","affiliation":[{"name":"Fiber Materials and Environmental Technologies (FibEnTech-UBI), Universidade da Beira Interior, R. Marqu\u00eas de D\u2019\u00c1vila e Bolama, 6200-001 Covilh\u00e3, Portugal"}]},{"given":"Lurdes","family":"Cir\u00edaco","sequence":"additional","affiliation":[{"name":"Fiber Materials and Environmental Technologies (FibEnTech-UBI), Universidade da Beira Interior, R. Marqu\u00eas de D\u2019\u00c1vila e Bolama, 6200-001 Covilh\u00e3, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2022,3,27]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"451","DOI":"10.1016\/j.jhazmat.2009.02.052","article-title":"Photocatalytic degradation of three azo dyes using immobilized TiO2 nanoparticles on glass plates activated by UV light irradiation: Influence of dye molecular structure","volume":"168","author":"Khataee","year":"2009","journal-title":"J. Hazard. Mater."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"357","DOI":"10.1016\/j.seppur.2010.03.005","article-title":"Photocatalytic degradation of azo dye in aqueous TiO2 suspension: Reaction pathway and identification of intermediates products by LC\/MS","volume":"72","author":"Bansal","year":"2010","journal-title":"Sep. Purif. 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