{"title":"Decolorization of RhB on three-dimensional porous CeO<sub>2</sub>/LaFeO<sub>3</sub>/SrTiO<sub>3</sub> catalyst via photo-fenton-like catalysis.","authors":"Lihua Zhang, Guowen Dong, Xiaomin Liu, Yu Niu, Wei Gao, Qiong Yang, Zaixing Li","doi":"10.1007/s43630-024-00619-1","DOIUrl":null,"url":null,"abstract":"<p><p>The catalysts with three-dimensional porous (3DP) CeO<sub>2</sub>, LaFeO<sub>3</sub> and SrTiO<sub>3</sub> are synthesized by sol-gel method and chemical precipitation method. The resulting multi-component 3DP CeO<sub>2</sub>/LaFeO<sub>3</sub>/SrTiO<sub>3</sub> composite material featured a high specific surface area (26.08 m<sup>2</sup>/g), which can provide more surface active sites to improve adsorption capacity and catalytic performance. The photocatalytic, Fenton-like, photo-Fenton-like performance of the catalyst are studied on decolorization of RhB under UV irradiation, respectively. 3DP CeO<sub>2</sub>/LaFeO<sub>3</sub>/SrTiO<sub>3</sub> exhibits high catalytic performance. Compared with photocatalytic or Fenton-like performance, 3DP CeO<sub>2</sub>/LaFeO<sub>3</sub>/SrTiO<sub>3</sub> catalyst exhibits higher photo-Fenton-like performance, facilitating efficient decolorization of the rhodamine B. Moreover, the initial reaction rate on decolorization of RhB with 3DP CeO<sub>2</sub>/LaFeO<sub>3</sub>/SrTiO<sub>3</sub> is 10.55, 5.52, 3.67 and 1.51 times higher than that with SrTiO<sub>3</sub>, LaFeO<sub>3</sub>, 3DP CeO<sub>2</sub> and 3DP CeO<sub>2</sub>/LaFeO<sub>3</sub>, respectively. Meanwhile, 3DP LaFeO<sub>3</sub>/CeO<sub>2</sub>/SrTiO<sub>3</sub> has a wider pH usage range in the synergistic reaction. Finally, a catalytic mechanism for the decolorization of rhodamine B is proposed. The continuous cycling of Fe<sup>3+</sup>/Fe<sup>2+</sup> and Ce<sup>4+</sup>/Ce<sup>3+</sup> and the production of active substances are achieved under the photo-Fenton-like effect of the catalyst.</p>","PeriodicalId":98,"journal":{"name":"Photochemical & Photobiological Sciences","volume":" ","pages":"1659-1672"},"PeriodicalIF":2.7000,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Photochemical & Photobiological Sciences","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1007/s43630-024-00619-1","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/8/26 0:00:00","PubModel":"Epub","JCR":"Q3","JCRName":"BIOCHEMISTRY & MOLECULAR BIOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
The catalysts with three-dimensional porous (3DP) CeO2, LaFeO3 and SrTiO3 are synthesized by sol-gel method and chemical precipitation method. The resulting multi-component 3DP CeO2/LaFeO3/SrTiO3 composite material featured a high specific surface area (26.08 m2/g), which can provide more surface active sites to improve adsorption capacity and catalytic performance. The photocatalytic, Fenton-like, photo-Fenton-like performance of the catalyst are studied on decolorization of RhB under UV irradiation, respectively. 3DP CeO2/LaFeO3/SrTiO3 exhibits high catalytic performance. Compared with photocatalytic or Fenton-like performance, 3DP CeO2/LaFeO3/SrTiO3 catalyst exhibits higher photo-Fenton-like performance, facilitating efficient decolorization of the rhodamine B. Moreover, the initial reaction rate on decolorization of RhB with 3DP CeO2/LaFeO3/SrTiO3 is 10.55, 5.52, 3.67 and 1.51 times higher than that with SrTiO3, LaFeO3, 3DP CeO2 and 3DP CeO2/LaFeO3, respectively. Meanwhile, 3DP LaFeO3/CeO2/SrTiO3 has a wider pH usage range in the synergistic reaction. Finally, a catalytic mechanism for the decolorization of rhodamine B is proposed. The continuous cycling of Fe3+/Fe2+ and Ce4+/Ce3+ and the production of active substances are achieved under the photo-Fenton-like effect of the catalyst.
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