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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Synthesis of mesoporous ZnO/TiO2-SiO2 composite material and its application in photocatalytic adsorption desulfurization without the addition of an extra oxidant
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Synthesis of mesoporous ZnO/TiO2-SiO2 composite material and its application in photocatalytic adsorption desulfurization without the addition of an extra oxidant

机译：中孔ZnO / TiO2-SiO2复合材料的合成及其在光催化吸附脱硫的情况下添加额外氧化剂

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Photocatalytic adsorption desulfurization (PADS) technology has attracted enormous attention in the deep desulfurization field. Therefore, a good material with high photocatalytic activity and adsorption capacity toward organic sulfide is desirable. Herein, mesoporous ZnO/TiO2-SiO2 (ZTS) was synthesized for the first time and successfully applied in the photocatalytic desulfurization of dibenzothiophene (DBT). The composite materials were characterized by means of X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), N-2-physisorption, transmission electron microscopy (TEM), UV-Vis diffusive reflectance spectra (UV-Vis DRS), X-ray photo-electron spectroscopy (XPS), photoluminescence (PL) and electron spin resonance (ESR). The results show that the doping of TiO2 promotes the photocatalytic and adsorption abilities of the catalysts dramatically. ZTS-3 with Si/Ti = 3 exhibits the best photocatalytic desulfurization activity compared with other proportions of titanium doping. The final DBT conversion can reach 97%, and the maximum adsorption of DBT over ZTS-3 is 47 mg-S per g-cat. The photocatalytic test indicates that the remarkable photocatalytic activity of ZTS is due to the formation of a heterojunction by the interaction of ZnO and TiO2, which can successfully expand solar light absorption, improving the charge separation efficiency and inhibiting the recombination of photocatalytic electron-hole pairs. Moreover, no extra oxidants (such as O-2, H2O2 or an organic oxidant) were added, which is highly beneficial for the consequent treatment of the fuel and can reduce the processing cost markedly.
机译：光催化吸附脱硫（PAD）技术在深脱硫领域引起了巨大的关注。因此，希望具有高光催化活性和朝向有机硫化物的吸附能力的良好材料。在此，首次合成中孔ZnO / TiO2-SiO 2（ZTS）并成功地应用于二苯并噻吩的光催化脱硫（DBT）。通过X射线衍射（XRD），场发射扫描电子显微镜（FESEM），N-2物理，透射电子显微镜（TEM），UV-VI扩散反射光谱（UV-VIS DRS），将复合材料表征。 ，X射线照片电子光谱（XPS），光致发光（PL）和电子自旋共振（ESR）。结果表明，TiO2的掺杂促进了催化剂的光催化和吸附能力。与Si / Ti = 3的ZTS-3表现出最佳的光催化脱硫活性，与其他比例的钛掺杂相比。最终的DBT转换可以达到97％，并且DBT过度ZTS-3的最大吸附是每G-Cat的47 mg-s。光催化试验表明，ZTS的显着光催化活性是由于ZnO和TiO2的相互作用形成了异质结，这可以成功地扩展太阳光吸收，提高电荷分离效率并抑制光催化电子 - 孔对的重组。此外，不加入额外的氧化剂（例如O-2，H 2 O 2或有机氧化剂），这对于随后的燃料处理非常有益，并且可以显着降低加工成本。

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