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首页> 外文期刊>RSC Advances >Catalytic and photocatalytic oxidation of diphenyl sulphide to diphenyl sulfoxide over titanium dioxide doped with vanadium, zinc, and tin
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Catalytic and photocatalytic oxidation of diphenyl sulphide to diphenyl sulfoxide over titanium dioxide doped with vanadium, zinc, and tin

机译：用钒，锌和锡掺杂二氧化钛二苯基硫化二苯基硫化苯基硫化物的催化和光催化氧化

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Samples of TiO2 (P25) doped with zinc, tin, and vanadium, thermally treated at 550 degrees C for 6 h, were tested as catalysts and photocatalysts for the oxidation of diphenyl sulphide to diphenyl sulfoxide and sulfone, using hydrogen peroxide as an oxidation agent. Thermal treatment of pure TiO2 and its vanadium-doped forms resulted in a decrease of anatase and an increase of rutile content. The opposite effect was observed for TiO2 doped with zinc or tin, where thermal treatment resulted in the rutile to anatase phase transition. The role of V, Zn, and Sn admixtures as TiO2 phase-composition controllers was postulated. The catalytic and photocatalytic activity was found to be influenced more by the rutile and anatase contents of the samples than the presence of admixtures. The rutile-containing samples, TiO2 and V-TiO2, presented much better activity in the catalytic oxidation of diphenyl sulphide compared with the catalysts that only contained the anatase phase, Sn-TiO2 and Zn-TiO2. The reaction efficiency was significantly improved under UV radiation. In this case, the best photocatalytic activity was found for calcined TiO2, containing both anatase and rutile components. An increase in rutile content, observed in the vanadium-doped TiO2, decreased the efficiency of the photocatalytic diphenyl sulphide oxidation. Thus, the presence of both anatase and rutile phases, with their favourable contributions, typical for P25, is necessary for the effective oxidation of Ph2S to Ph2SO. Moreover, it was shown that for the second oxidation stage, Ph2SO to Ph2SO2, the presence of the rutile phase is very important.
机译：掺杂有锌，锡和钒的TiO 2（P25）的样品在550℃下热处理6小时，用氧化氢作为氧化剂作为催化剂和光催化剂，以氧化二苯基硫醚和砜，作为氧化剂。纯TiO 2的热处理及其钒掺杂形式导致锐钛矿的降低和金红石含量的增加。用锌或锡掺杂的TiO2观察到相反的效果，其中热处理导致金红石与锐钛矿相转变。假设V，Zn和Sn和Snapxtures作为TiO2相组合控制器的作用。发现催化和光催化活性受到样品的金红石和锐钛矿含量的影响，而不是混合物的存在。与仅含有锐钛矿相，Sn-TiO2和Zn-TiO 2的催化剂相比，含金红石的样品TiO 2和V-TiO 2在二苯基硫化物的催化氧化中呈现了更好的活性。在紫外线辐射下，反应效率显着改善。在这种情况下，发现含有锐钛矿和金红石组分的煅烧TiO 2的最佳光催化活性。在钒掺杂TiO 2中观察到的金红石含量的增加降低了光催化二苯基硫化物氧化的效率。因此，锐钛矿和金红石相的存在具有典型的P25的良好贡献，对于PH2S至pH2SO的有效氧化是必要的。此外，表明对于第二氧化阶段，PH2SO至pH 2 SO 2，金红石相的存在非常重要。

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  • 来源
    《RSC Advances》 |2020年第7期|共9页
  • 作者

    Radko Marcelina; Kowalczyk Andrzej; Mikrut Pawe; Witkowski Stefan; Mozgawa Wodzimierz; Macyk Wojciech; Chmielarz Lucjan;

  • 作者单位

    Jagiellonian Univ Fac Chem Gronostajowa 2 PL-30387 Krakow Poland;

    Jagiellonian Univ Fac Chem Gronostajowa 2 PL-30387 Krakow Poland;

    Jagiellonian Univ Fac Chem Gronostajowa 2 PL-30387 Krakow Poland;

    Jagiellonian Univ Fac Chem Gronostajowa 2 PL-30387 Krakow Poland;

    AGH Univ Sci &

    Technol Fac Mat Sci &

    Ceram Mickiewicza 30 PL-30059 Krakow Poland;

    Jagiellonian Univ Fac Chem Gronostajowa 2 PL-30387 Krakow Poland;

    Jagiellonian Univ Fac Chem Gronostajowa 2 PL-30387 Krakow Poland;

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  • 中图分类 化学;
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