{"title":"Fabrication of SnO2/TiO2 composite by a chemical co-precipitation method for efficient electrocatalytic oxidation of methylene blue","authors":"","doi":"10.1007/s43153-024-00438-y","DOIUrl":null,"url":null,"abstract":"<h3>Abstract</h3> <p>In the present research, the Tin dioxide/Titanium dioxide (SnO<sub>2</sub>/TiO<sub>2</sub>) composite has been successfully fabricated by a chemical co-precipitation method. SnO<sub>2</sub>/TiO<sub>2</sub> composite precursors were calcined at different temperatures (400 °C, 500 °C 600 °C, 700 °C). The degradation experiment of methylene blue (MB) dye using SnO<sub>2</sub>/TiO<sub>2</sub> composite material was conducted to analyze the electrocatalytic performance. The degradation efficiency of the composite material can reach 96.6% (calcination at 500 °C). The logarithm of methylene blue concentration exhibits a strong linear relationship with reaction time, and the correlation coefficient R for each curve exceeds 0.99. This suggests that the electrocatalytic degradation process of methylene blue follows quasi-first order reaction kinetics. The ⋅OH present in the whole system can oxidize methylene blue (MB) into CO<sub>2</sub> and H<sub>2</sub>O, and the reaction is accompanied by oxygen evolution reaction. The inactive electrode has weak adsorption to the free ⋅OH, so the SnO<sub>2</sub>/TiO<sub>2</sub> electrode in the system has obvious advantages. The composite material electrode calcinated at 500 °C has the fastest electrocatalytic decolorization reaction rate and the highest catalytic capacity, which is consistent with the results of degradation efficiency.</p> <span> <h3>Graphical abstract</h3> <p> <span> <span> <img alt=\"\" src=\"https://static-content.springer.com/image/MediaObjects/43153_2024_438_Figa_HTML.png\"/> </span> </span></p> </span>","PeriodicalId":9194,"journal":{"name":"Brazilian Journal of Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":1.5000,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Brazilian Journal of Chemical Engineering","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1007/s43153-024-00438-y","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
In the present research, the Tin dioxide/Titanium dioxide (SnO2/TiO2) composite has been successfully fabricated by a chemical co-precipitation method. SnO2/TiO2 composite precursors were calcined at different temperatures (400 °C, 500 °C 600 °C, 700 °C). The degradation experiment of methylene blue (MB) dye using SnO2/TiO2 composite material was conducted to analyze the electrocatalytic performance. The degradation efficiency of the composite material can reach 96.6% (calcination at 500 °C). The logarithm of methylene blue concentration exhibits a strong linear relationship with reaction time, and the correlation coefficient R for each curve exceeds 0.99. This suggests that the electrocatalytic degradation process of methylene blue follows quasi-first order reaction kinetics. The ⋅OH present in the whole system can oxidize methylene blue (MB) into CO2 and H2O, and the reaction is accompanied by oxygen evolution reaction. The inactive electrode has weak adsorption to the free ⋅OH, so the SnO2/TiO2 electrode in the system has obvious advantages. The composite material electrode calcinated at 500 °C has the fastest electrocatalytic decolorization reaction rate and the highest catalytic capacity, which is consistent with the results of degradation efficiency.
期刊介绍：
The Brazilian Journal of Chemical Engineering is a quarterly publication of the Associação Brasileira de Engenharia Química (Brazilian Society of Chemical Engineering - ABEQ) aiming at publishing papers reporting on basic and applied research and innovation in the field of chemical engineering and related areas.
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