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Fabrication and characterization of SiO2@TiO2@silicalite-1 catalyst and its application for degradation of rhodamine B

机译:SiO2 @ TiO2硅胶-1催化剂的制备与表征及其在罗丹明B降解中的应用

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摘要

SiO2@TiO2@silicalite-1 catalyst, with TiO2 (Degussa P25) nanoparticles encapsulated by SiO2 and adhered on the surface of silicalite-1 zeolite, was successfully fabricated by combining pressing, sintering and infiltration methods. The samples were characterized by XRD, SEM, FT-IR, TEM, nitrogen sorption, and UV-vis diffuse reflectance spectra. The photocatalytic properties were investigated by degradation of rhodamine B (RhB) aqueous solution under UV light. The results show that TiO2 nanoparticles are coated with a SiO2 shell and bonded together. The core/shell structure of TiO2@SiO2 is attached to the surface of silicalite-1 particles. The photocatalytic efficiency of TiO2@silicalite-1 is 97.4%. When the catalyst is coated with SiO2, its photocatalytic efficiency is significantly improved to 99.7%. Furthermore, the rate of degradation using SiO2@TiO2@silicalite-1 is 1.54 times faster than that using TiO2@silicalite-1.
机译:通过组合压制,烧结和渗透方法,成功地制造了SiO 2(Degussa P25)纳米颗粒并粘附在硅钛-1沸石表面上的硅酸盐-1催化剂。 样品的特征在于XRD,SEM,FT-IR,TEM,氮吸附和UV-Vis漫反射谱。 通过UV光下的罗丹明B(RHB)水溶液的降解研究光催化性质。 结果表明,TiO2纳米颗粒用SiO 2壳涂覆并粘合在一起。 TiO2 @ SiO 2的核心/壳结构附着在硅藻土-1颗粒的表面上。 TiO2的光催化效率为97.4%。 当催化剂涂有SiO 2时,其光催化效率显着提高至99.7%。 此外,使用SiO2 @ TiO2 @硅钛矿-1的降解速率比使用TiO2 @硅藻土-1快1.54倍。

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  • 来源
    《RSC Advances》 |2016年第107期|共7页
  • 作者单位

    Xiamen Univ Coll Mat Fujian Key Lab Adv Mat Xiamen 361005 Peoples R China;

    Xiamen Univ Coll Mat Fujian Key Lab Adv Mat Xiamen 361005 Peoples R China;

    Xiamen Univ Coll Mat Fujian Key Lab Adv Mat Xiamen 361005 Peoples R China;

    Xiamen Univ Coll Mat Fujian Key Lab Adv Mat Xiamen 361005 Peoples R China;

    Xiamen Univ Coll Mat Fujian Key Lab Adv Mat Xiamen 361005 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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