{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,27]],"date-time":"2026-06-27T05:46:49Z","timestamp":1782539209197,"version":"3.54.5"},"reference-count":40,"publisher":"MDPI AG","issue":"13","license":[{"start":{"date-parts":[[2026,6,23]],"date-time":"2026-06-23T00:00:00Z","timestamp":1782172800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100012190","name":"Ministry of Science and Higher Education of the Russian Federation","doi-asserted-by":"crossref","award":["FENN-2024-0006"],"award-info":[{"award-number":["FENN-2024-0006"]}],"id":[{"id":"10.13039\/501100012190","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>In this work, we introduce the novel possibility of producing blue fluorescent ultraviolet pigments from phosphogypsum. The obtained materials are characterized by X-ray diffraction (XRD), transmission electron microscopy, and X-ray photoelectron spectroscopy (XPS). The formation of the CaS phase in the sample during the reduction of calcium sulfate was established. Thermal treatment of phosphogypsum in the presence of a reducing agent (potato starch) under environmental isolation conditions is found to yield high-quality products with high added value. The highest luminosity is established in samples containing 0.6 mol. %, which were heat-treated under a temperature of 1100 \u00b0C for 60 min. The synthesized CaS:Cu materials are shown to emit light in the blue region of the spectrum, with an emission maximum at a wavelength of 480\u2013490 nm. The developed technological methods open the possibility to recycle chemical industry waste, which contributes to the achievement of sustainable development goals, in particular, the goal of ensuring rational consumption and production patterns.<\/jats:p>","DOI":"10.3390\/molecules31132202","type":"journal-article","created":{"date-parts":[[2026,6,23]],"date-time":"2026-06-23T17:11:49Z","timestamp":1782234709000},"page":"2202","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Phosphogypsum Processing into Blue Fluorescent Pigments Under Ultraviolet Excitation"],"prefix":"10.3390","volume":"31","author":[{"given":"Marina A.","family":"Egorova","sequence":"first","affiliation":[{"name":"Department of Ecology and Industrial Safety, Faculty of Technology, Platov South-Russian State Polytechnic University (NPI), Novocherkassk 346428, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Darya V.","family":"Yakhonova","sequence":"additional","affiliation":[{"name":"Department of Ecology and Industrial Safety, Faculty of Technology, Platov South-Russian State Polytechnic University (NPI), Novocherkassk 346428, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vera A.","family":"Baranova","sequence":"additional","affiliation":[{"name":"Department of Ecology and Industrial Safety, Faculty of Technology, Platov South-Russian State Polytechnic University (NPI), Novocherkassk 346428, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Oleg A.","family":"Medennikov","sequence":"additional","affiliation":[{"name":"Department of Ecology and Industrial Safety, Faculty of Technology, Platov South-Russian State Polytechnic University (NPI), Novocherkassk 346428, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0830-1268","authenticated-orcid":false,"given":"Valentina V.","family":"Utochnikova","sequence":"additional","affiliation":[{"name":"Department of Nanomaterials, Faculty of Materials Sciences, Lomonosov Moscow State University, Moscow 119991, Russia"},{"name":"Center of Advanced Research, National Research University \u201cHigher School of Economics\u201d, Moscow 108028, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2534-2835","authenticated-orcid":false,"given":"Anastasia V.","family":"Orlova","sequence":"additional","affiliation":[{"name":"Department of Nanomaterials, Faculty of Materials Sciences, Lomonosov Moscow State University, Moscow 119991, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8266-2128","authenticated-orcid":false,"given":"Nina P.","family":"Shabelskaya","sequence":"additional","affiliation":[{"name":"Department of Ecology and Industrial Safety, Faculty of Technology, Platov South-Russian State Polytechnic University (NPI), Novocherkassk 346428, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Asatullo M.","family":"Radzhabov","sequence":"additional","affiliation":[{"name":"Department of Ecology and Industrial Safety, Faculty of Technology, Platov South-Russian State Polytechnic University (NPI), Novocherkassk 346428, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alexandr V.","family":"Vyaltsev","sequence":"additional","affiliation":[{"name":"Department of Ecology and Industrial Safety, Faculty of Technology, Platov South-Russian State Polytechnic University (NPI), Novocherkassk 346428, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6099-6098","authenticated-orcid":false,"given":"Sergey I.","family":"Sulima","sequence":"additional","affiliation":[{"name":"Department of Chemical Technologies, Faculty of Technology, Platov South-Russian State Polytechnic University (NPI), Novocherkassk 346428, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,6,23]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"182532","DOI":"10.1016\/j.jallcom.2025.182532","article-title":"A superb blue phosphor Na3Ba2Sr(PO4)3:Eu2+ with high quantum yield and zero-thermal-quenching for plant growth LEDs","volume":"1037","author":"Tang","year":"2025","journal-title":"J. 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