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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Consecutive interlayer disassembly-reassembly during alumination of UOV zeolites: insight into the mechanism
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Consecutive interlayer disassembly-reassembly during alumination of UOV zeolites: insight into the mechanism

机译：连续的中间层拆卸 - 在uov沸石的化膦中进行重组：洞察机制

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摘要

Investigation of the kinetics of UOV germanosilicate alumination by X-ray diffraction, Al-27 and Si-29 MAS NMR, ICP/OES and FTIR spectroscopy showed the multi-stage mechanism of the process. The first step consists of degermanation and partial disassembly followed by Al incorporation into the UOV germanosilicate framework in the second step. The Al atoms stabilize the UOV framework by healing the defects formed after rapid hydrolysis of Ge-O-Si bonds, which was evidenced by comparison with the reference treatment of initial UOV samples with HNO3 (pH = 2). Post-synthesis alumination of UOV leads to the generation of strong Bronsted and Lewis acid sites; their ratio in aluminated UOV derivatives can be adjusted by the variation of treatment conditions. The intrinsic properties of parent UOV germanosilicates determine the textural properties of aluminated derivatives.
机译：通过X射线衍射，Al-27和Si-29mas NMR，ICP / OES和FTIR光谱研究UOV锗硅酸盐铝酸盐的动力学显示了该方法的多级机制。 第一步由甲醛和部分拆卸组成，然后在第二步中掺入UOV锗硅酸盐框架。 Al原子通过愈合在快速水解的Ge-O-Si键后愈合形成的缺陷来稳定UOV框架，这通过与HNO 3（pH = 2）的初始UOV样品的参考处理进行了证明。 uov后合成铝制媒介导致强富棱镜和路易斯酸部位的产生; 它们在铝化型UOV衍生物中的比率可以通过处理条件的变异来调节。 亲本乌伐奈米氏菌素的内在特性确定了铝化衍生物的纹理性质。

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    Kasneryk Valeryia; Opanasenko Maksym; Shamzhy Mariya; Musilova Zuzana; Avadhut Yamini S.; Hartmann Martin; Cejka Jiri;

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    Acad Sci Czech Republ J Heyrovsky Inst Phys Chem Dolejskova 3 CR-18223 Prague 8 Czech Republic;

    Charles Univ Prague Fac Sci Dept Phys &

    Macromol Chem Hlavova 8 Prague 12843 2 Czech Republic;

    Charles Univ Prague Fac Sci Dept Phys &

    Macromol Chem Hlavova 8 Prague 12843 2 Czech Republic;

    Acad Sci Czech Republ J Heyrovsky Inst Phys Chem Dolejskova 3 CR-18223 Prague 8 Czech Republic;

    Friedrich Alexander Univ Erlangen Nurnberg FAU Erlangen Catalysis Resource Ctr Egerlandstr 3 D-91058 Erlangen Germany;

    Friedrich Alexander Univ Erlangen Nurnberg FAU Erlangen Catalysis Resource Ctr Egerlandstr 3 D-91058 Erlangen Germany;

    Acad Sci Czech Republ J Heyrovsky Inst Phys Chem Dolejskova 3 CR-18223 Prague 8 Czech Republic;

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  • 正文语种 eng
  • 中图分类 工程材料学;
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