{"title":"Characterization of Silylated Ti–SiO2 Prepared by Chemical Vapor Deposition and Its Catalytic Performance in Green Epoxidation of Soybean Oil","authors":"Xuefeng Li, Like Zhang","doi":"10.1134/S1070427224040013","DOIUrl":null,"url":null,"abstract":"<p>Silylated Ti–SiO<sub>2</sub> (S–Ti–SiO<sub>2</sub>) was prepared by the chemical vapor deposition of TiCl<sub>4</sub> and following hexamethyldisilazane (HMDS) on SiO<sub>2</sub>. Its specific surface area and pore size are decreased compared with Ti-SiO<sub>2</sub> while it keeps highly dispersed Ti species with low coordination. More importantly, S–Ti–SiO<sub>2</sub> possesses higher hydrophobicity than Ti-SiO<sub>2</sub>, which can explain the fact that it performs better than Ti-SiO<sub>2</sub> in catalytic epoxidation of soybean oil using 30% aqueous H<sub>2</sub>O<sub>2</sub> as oxidant. The relative conversion to oxirane (RCO) of S–Ti–SiO<sub>2</sub> can reach 27% and the catalyst can be used 3 times under the best reaction conditions.</p>","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"97 4","pages":"454 - 462"},"PeriodicalIF":0.6000,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Journal of Applied Chemistry","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1134/S1070427224040013","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}
引用次数: 0
Abstract
Silylated Ti–SiO2 (S–Ti–SiO2) was prepared by the chemical vapor deposition of TiCl4 and following hexamethyldisilazane (HMDS) on SiO2. Its specific surface area and pore size are decreased compared with Ti-SiO2 while it keeps highly dispersed Ti species with low coordination. More importantly, S–Ti–SiO2 possesses higher hydrophobicity than Ti-SiO2, which can explain the fact that it performs better than Ti-SiO2 in catalytic epoxidation of soybean oil using 30% aqueous H2O2 as oxidant. The relative conversion to oxirane (RCO) of S–Ti–SiO2 can reach 27% and the catalyst can be used 3 times under the best reaction conditions.
期刊介绍：
Russian Journal of Applied Chemistry (Zhurnal prikladnoi khimii) was founded in 1928. It covers all application problems of modern chemistry, including the structure of inorganic and organic compounds, kinetics and mechanisms of chemical reactions, problems of chemical processes and apparatus, borderline problems of chemistry, and applied research.
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