{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,10]],"date-time":"2025-11-10T13:54:23Z","timestamp":1762782863222,"version":"build-2065373602"},"reference-count":55,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2023,2,9]],"date-time":"2023-02-09T00:00:00Z","timestamp":1675900800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Nucleu Program within the National Research Development and Innovation Plan 2022\u20132027","award":["29N\/2023","CNCS\/CCCDI-UEFISCDI","PN-III-P2-2.1-PED-2021-2421"],"award-info":[{"award-number":["29N\/2023","CNCS\/CCCDI-UEFISCDI","PN-III-P2-2.1-PED-2021-2421"]}]},{"name":"MCID","award":["29N\/2023","CNCS\/CCCDI-UEFISCDI","PN-III-P2-2.1-PED-2021-2421"],"award-info":[{"award-number":["29N\/2023","CNCS\/CCCDI-UEFISCDI","PN-III-P2-2.1-PED-2021-2421"]}]},{"name":"Romanian National Authority for Scientific Research and Innovation","award":["29N\/2023","CNCS\/CCCDI-UEFISCDI","PN-III-P2-2.1-PED-2021-2421"],"award-info":[{"award-number":["29N\/2023","CNCS\/CCCDI-UEFISCDI","PN-III-P2-2.1-PED-2021-2421"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Inorganics"],"abstract":"<jats:p>This study focuses on the development of a Ca-Bi-O system (CBO) with efficiency in the degradation of Rhodamine B, which is extremely toxic to many organisms and can have long-term negative consequences if not safely removed from the water. The conventional precipitation method was used to create a stable phase of Ca2Bi2O5 with a stoichiometric 1:1 molar ratio of Ca:Bi. Before obtaining the pure phase, the details of the reaction processes were investigated and the various intermediate products were identified using X-ray diffraction followed by Fourier transform infrared, UV-Vis, and Raman spectroscopy. An ab initio calculation evaluated with the HSE06 functional yields a band gap of 3.5 eV, similar to the band gap obtained by diffuse reflectance recorded on Ca2Bi2O5. This newly synthesized compound is addressed to the environmental application by investigating the photocatalytic properties of CBO materials obtained at different calcination temperatures. The investigation of pure Ca2Bi2O5, with characterization techniques and complemented by new first-principles calculations to investigate the photocatalysis provide valuable new insights for this scarcely studied yet potentially interesting compound.<\/jats:p>","DOI":"10.3390\/inorganics11020079","type":"journal-article","created":{"date-parts":[[2023,2,10]],"date-time":"2023-02-10T05:18:35Z","timestamp":1676006315000},"page":"79","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Preparing a Ca-Bi-O System by the Precipitation Method and Studying Its Intermediate Structural Properties for Applications in Water Treatment"],"prefix":"10.3390","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7001-3542","authenticated-orcid":false,"given":"Adrian Ionu\u021b","family":"Cadi\u0219","sequence":"first","affiliation":[{"name":"\u201cRaluca Ripan\u201d Institute for Research in Chemistry, \u201cBabes-Bolyai\u201d University, Fantanele 30, 400294 Cluj-Napoca, Romania"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8505-0733","authenticated-orcid":false,"given":"Florina \u0218tefania","family":"Rus","sequence":"additional","affiliation":[{"name":"National Institute for Research and Development in Electrochemistry and Condensed Matter, 300569 Timisoara, Romania"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9057-378X","authenticated-orcid":false,"given":"Jo\u00e3o Nuno","family":"Gon\u00e7alves","sequence":"additional","affiliation":[{"name":"CICECO\u2014Aveiro Institute of Materials and Departamento de F\u00edsica, Universidade de Aveiro, 3810-193 Aveiro, Portugal"}]},{"given":"M\u0103d\u0103lina","family":"Ivanovici","sequence":"additional","affiliation":[{"name":"National Institute for Research and Development in Electrochemistry and Condensed Matter, 300569 Timisoara, Romania"}]}],"member":"1968","published-online":{"date-parts":[[2023,2,9]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1264","DOI":"10.3390\/w7031264","article-title":"Impact of Population Growth and Climate Change on the Freshwater Resources of Lamu Island, Kenya","volume":"7","author":"Okello","year":"2015","journal-title":"Water"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"557","DOI":"10.1016\/j.apcatb.2018.01.054","article-title":"Microstructure and Performance of Z-Scheme Photocatalyst of Silver Phosphate Modified by MWCNTs and Cr-Doped SrTiO3 for Malachite Green Degradation","volume":"227","author":"Lin","year":"2018","journal-title":"Appl. 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