{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,21]],"date-time":"2026-04-21T19:42:36Z","timestamp":1776800556150,"version":"3.51.2"},"reference-count":62,"publisher":"MDPI AG","issue":"21","license":[{"start":{"date-parts":[[2020,10,31]],"date-time":"2020-10-31T00:00:00Z","timestamp":1604102400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>Mixed oxides containing zinc and lanthanum were prepared by coprecipitation in alkaline medium, followed by calcination at 400 \u00b0C. The initial precipitation product and the calcined form were characterized by Brunauer\u2013Emmett\u2013Teller (BET) method adsorption of nitrogen at \u2212196 \u00b0C, Scanning Electron Microscopy\/Electron-Probe Microanalysis (SEM\/EPM), Ultraviolet\u2014Diffuse Reflectance Spectroscopy (UV-DRS) and Infrared (IR) spectroscopy. The band gap slightly changes from 3.23 eV to 3 eV by calcination. The photocatalytic performance of the solids were investigated in diluted aqueous medium, by using clofibric acid (CA), a stable and toxic molecule used as precursor in some pesticides and drugs, as test compound, possibly found in the wastewaters in low concentrations. The effects of the degradation extent, determined by high performance liquid chromatography (HPLC) and total organic carbon (TOC) measurements, were investigated at different initial concentrations of CA. Within about 60 min the CA degradation is almost total at low concentration values (3 ppm) and reaches over 80% in 180 min for an initial concentration of 50 ppm. Moreover, the CA removal performance of photocatalyst remains excellent after three cycles of use: the removal yield was practically total after 60 min in the first two cycles and reached 95% even in the third cycle.<\/jats:p>","DOI":"10.3390\/ma13214916","type":"journal-article","created":{"date-parts":[[2020,10,31]],"date-time":"2020-10-31T21:39:56Z","timestamp":1604180396000},"page":"4916","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Zn\/La Mixed Oxides Prepared by Coprecipitation: Synthesis, Characterization and Photocatalytic Studies"],"prefix":"10.3390","volume":"13","author":[{"given":"Amalia Maria","family":"Sescu","sequence":"first","affiliation":[{"name":"Department of Chemical Engineering, Faculty of Chemical Engineering and Environmental Protection, \u201cGheorghe Asachi\u201d Technical University of Iasi, 73, Prof.dr.doc. D. Mangeron Blvd., 700050 Iasi, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0152-0748","authenticated-orcid":false,"given":"Maria","family":"Harja","sequence":"additional","affiliation":[{"name":"Department of Chemical Engineering, Faculty of Chemical Engineering and Environmental Protection, \u201cGheorghe Asachi\u201d Technical University of Iasi, 73, Prof.dr.doc. D. Mangeron Blvd., 700050 Iasi, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7864-0062","authenticated-orcid":false,"given":"Lidia","family":"Favier","sequence":"additional","affiliation":[{"name":"Ecole Nationale Sup\u00e9rieure de Chimie de Rennes, Univ Rennes, CNRS, ISCR\u2014UMR6226, F-35000 Rennes, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Laurence Oughebbi","family":"Berthou","sequence":"additional","affiliation":[{"name":"Ecole Nationale Sup\u00e9rieure de Chimie de Rennes, Univ Rennes, CNRS, ISCR\u2014UMR6226, F-35000 Rennes, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Consuelo","family":"Gomez de Castro","sequence":"additional","affiliation":[{"name":"Department of Materials and Chemical Engineering, Faculty of Chemical, Complutense University of Madrid, Av. S\u00e9neca, 2, 28040 Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Aurel","family":"Pui","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Faculty of Chemistry, \u201cAlexandru Ioan Cuza\u201d University of Iasi, Bvld. Carol I No 11, 700506 Iasi, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3959-0891","authenticated-orcid":false,"given":"Doina","family":"Lutic","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Faculty of Chemistry, \u201cAlexandru Ioan Cuza\u201d University of Iasi, Bvld. Carol I No 11, 700506 Iasi, Romania"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2020,10,31]]},"reference":[{"key":"ref_1","unstructured":"Yu, J., Jaroniec, M., and Jiang, C. (2020). 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