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首页> 外文期刊>Applied Surface Science >Highly selective epoxidation of styrene over mesoporous Au-Ti-SBA-15 via photocatalysis process: Synthesis, characterization, and catalytic application
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Highly selective epoxidation of styrene over mesoporous Au-Ti-SBA-15 via photocatalysis process: Synthesis, characterization, and catalytic application

机译：苯乙烯在介孔Au-Ti-SBA-15上通过光催化过程的高选择性环氧化：合成，表征和催化应用

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摘要

Highly ordered Au-Ti-SBA-15 mesoporous molecular sieves were successfully synthesized by one-pot hydrothermal synthesis in acid medium, and were characterized by XRD, UV-vis, SEM, element-mapping, HRTEM, N_2 adsorption, XPS, ~29Si MAS NMR, NH3-TPD and FT-IR. The as-prepared Au-Ti-SBA-15 samples were possessed of highly ordered mesostructures with larger pore diameter, pore volume and uniform mesopore size distribution. In the oxidation of styrene with H_2O_2 as the oxidant over Au-Ti-SBA-15 catalyst under photo-irradiation, reaction parameters, such as molar ratio of H_2O_2 to styrene, reaction time, solvent, the amount of catalyst, catalyst species, and the amount of 3% NaOH, were conditioned at length. As a result, highly selective epoxidation of styrene over catalyst was carried out perfectly for 10 min with high TOF of 4.75 ×10~3 min~(-1).
机译：通过一锅水热法在酸性介质中成功合成了高阶Au-Ti-SBA-15介孔分子筛，并通过XRD，UV-vis，SEM，元素映射，HRTEM，N_2吸附，XPS，〜29Si表征MAS NMR，NH3-TPD和FT-IR。所制备的Au-Ti-SBA-15样品具有高度有序的介孔结构，具有较大的孔径，孔体积和均一的介孔尺寸分布。在光辐照下，Au-Ti-SBA-15催化剂上以H_2O_2为氧化剂氧化苯乙烯时，反应参数如H_2O_2与苯乙烯的摩尔比，反应时间，溶剂，催化剂用量，催化剂种类和长期调节3％NaOH的量。结果，苯乙烯在催化剂上的高选择性环氧化反应完美进行了10分钟，TOF为4.75×10〜3 min〜（-1）。

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  • 来源
    《Applied Surface Science》 |2011年第3期|p.1082-1090|共9页
  • 作者

    Yajie Guo; Zhengwang Liu; Guangjian Wang; Yanhog Huang; Fangfang Kang;

  • 作者单位

    School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, Anhui, PR China;

    School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, Anhui, PR China;

    School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, Anhui, PR China;

    School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, Anhui, PR China;

    School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, Anhui, PR China;

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  • 正文语种 eng
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  • 关键词

    Au-Ti-SBA-15; surface properties; photo-catalysis; high selectivity; epoxidation;

    机译：Au-Ti-SBA-15;表面性质光催化;高选择性环氧化;

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