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Synergistic effect of Zr-incorporated framework and subsequent deposition of PEHA towards efficient and reusable HPW/PEHA/ZrSBA-15 composites
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  • 作者:Ling-Yan Meng (1)
    Shang-Ru Zhai (1)
    Zuo-Yi Xiao (1)
    Qing-Da An (1)
    Xiao-Wei Song (2)
  • 关键词:SBA ; 15 ; Zirconium ; Pentaethylenehexamine ; Stabilizing effect ; Oxidation
  • 刊名:Journal of Sol-Gel Science and Technology
  • 出版年:2014
  • 出版时间:August 2014
  • 年:2014
  • 卷:71
  • 期:2
  • 页码:354-363
  • 全文大小:982 KB
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  • 作者单位:Ling-Yan Meng (1)
    Shang-Ru Zhai (1)
    Zuo-Yi Xiao (1)
    Qing-Da An (1)
    Xiao-Wei Song (2)

    1. Faculty of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian, 116034, China
    2. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China
  • ISSN:1573-4846
文摘
Heteropolyacid-based catalysts with molecular level distributions of surface functionalities were synthesized by anchoring phosphotungstic acid (HPW) onto the pentaethylenehexamine (PEHA) layers stabilized by platelet ZrSBA-15 with short mesochannels. Namely, the presence of zirconium species in pore walls could significantly improve the surface acidity to attract and stabilize PEHA species, leading to a stronger interaction between them and a superiority to make HPW species highly stable. Standard characterizations of XRD, SEM, TEM, FT-IR, TG, N2 adsorption–desorption and N elemental analyses were preserved to demonstrate the synergistic effect. The resulting composite were investigated for the oxidation of benzaldehyde to benzoic acid in the H2O2-mediated environment, the catalyst 25?% HPW/PEHA/ZrSBA-15 screened high yield for benzoic acid (~99.7?%). Besides, various reaction parameters such as reaction temperature, reaction time, the amount of hydrogen peroxide and catalyst reusability were also investigated for the oxidation of benzaldehyde to benzoic acid with a target to confirm the validity of the catalyst.

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