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首页> 外文期刊>Applied Surface Science >Visible-light-driven titania/silica photocatalyst co-doped with boron and ferrum
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Visible-light-driven titania/silica photocatalyst co-doped with boron and ferrum

机译：掺有硼和铁的可见光驱动二氧化钛/二氧化硅光催化剂

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The sol-gel route was employed to prepare a titania/silica photocatalyst co-doped with boron and ferrum. The microstructure and the optical property of the photocatalyst were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV-vis diffusive reflectance spectroscopy (DRS), Fourier transform infrared spectroscopy (FT-IR), and N_2 adsorption-desorption isotherm. The decomposition of phenol under visible light irradiation was used as probe reaction to evaluate the photocatalytic activity. The results revealed that the dopants could inhibit phase transformation of TiO_2, and that there were intimate molecule-level interactions between titania and silica. The doping boron led to the response to visible light. The doping ferrum, which existed in the form of Fe_2O_3 and dispersed on the surface of TiO_2, increased photoquantum efficiency and resulted in the enhancement of catalytic performance. The photocatalytic activity related to the annealing temperature and component. The synergistic effects of co-doping and intimate interaction between titania and silica were responsible for the increase of photoactivity.
机译：采用溶胶-凝胶法制备了硼和铁共掺杂的二氧化钛/二氧化硅光催化剂。通过X射线衍射（XRD），X射线光电子能谱（XPS），紫外可见漫反射光谱（DRS），傅里叶变换红外光谱（FT-IR）和X射线衍射来表征光催化剂的微观结构和光学性质。 N_2吸附-解吸等温线。以可见光照射下苯酚的分解为探针反应，评价其光催化活性。结果表明，掺杂剂可以抑制TiO_2的相变，二氧化钛与二氧化硅之间存在密切的分子级相互作用。掺杂硼导致对可见光的响应。以Fe_2O_3形式存在并分散在TiO_2表面上的掺杂铁提高了光量子效率，并提高了催化性能。光催化活性与退火温度和组分有关。共掺杂和二氧化钛与二氧化硅之间密切相互作用的协同作用是光活性增加的原因。

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