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Ionic-liquid-modified CMK-3 as a support for the immobilization of molybdate ions (MoO42-): Heterogeneous nanocatalyst for selective oxidation of sulfides and benzylic alcohols
Biomaterials Advances ( IF 7.9 ) Pub Date : 2020-01-07 , DOI: 10.1016/j.msec.2019.110577
Fereshteh Hosseini-Eshbala , Alireza Sedrpoushan , Bernhard Breit , Farajollah Mohanazadeh , Hojat Veisi

A nanometric carbon CMK-3 modified with octylimidazolium ionic liquid and MoO42 as a new hybrid catalyst was synthesized. The study is the first to report a successful immobilization of MoO4= on the CMK-3/OctIm as a hybrid nanocatalyst. A variety of analytical methods were utilized to determine the properties of the structure and morphology of the synthesized nanocatalyst [CMK-3/Im/MoO42]. The analytical techniques were transmission electron microscopy (TEM), scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDS), inductively coupled plasma (ICP), X-ray diffraction (XRD), N2 isotherms (BET), IR spectroscopy and thermogravimetric analysis (TGA). CMK-3/OctIm/MoO42 hybrid catalyst demonstrated a considerable catalytic activity. It is a recyclable nanocatalyst that is utilized to chemoselectively oxidize different types of sulfides to the corresponding sulfoxides and benzylic alcohols to aldehydes using the green oxidant, hydrogen peroxide (H2O2) in high-yields. With a little leaching and variation in activity, it is possible to recover and reuse the catalyst frequently. A combination of molybdate anion and the CMK-3 order mesoporous carbon resulted in an improvement in the performance of catalysis and ease of separation for the reaction procedure.



中文翻译:

离子液体改性的CMK-3,用于固定钼酸根离子(MoO 4 2-):用于选择性氧化硫化物和苯甲醇的非均相纳米催化剂

甲纳米碳CMK-3修饰辛基咪唑鎓离子液体和的MoO 4 2 -作为新的混合催化剂的合成。该研究是第一个报告MoO 4 =成功作为混合纳米催化剂固定在CMK-3 / OctIm上的研究。多种分析方法用于确定所合成的纳米催化剂的结构和形态的性质[CMK-3 / IM /的MoO 4 2 - ]。分析技术为透射电子显微镜(TEM),扫描电子显微镜(SEM),能量色散X射线光谱仪(EDS),电感耦合等离子体(ICP),X射线衍射(XRD),N 2等温线(BET),红外光谱和热重分析(TGA)。CMK-3 / OctIm /的MoO 4 2 -杂化催化剂表现出相当大的催化活性。它是一种可循环利用的纳米催化剂,可用于使用绿色氧化剂过氧化氢(H 2 O 2)以高收率将不同类型的硫化物化学选择性地氧化为相应的亚砜,将苄醇氧化为醛。通过少量的浸出和活性变化,可以频繁地回收和再利用催化剂。钼酸根阴离子和CMK-3级中孔碳的组合可提高催化性能,并易于分离反应过程。

更新日期:2020-01-07
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