Ionic liquid assisted hydrothermal synthesis of MoS<sub>2</sub> double-shell polyhedral cages with enhanced catalytic hydrogenation activities

Jiahe Li; Donge Wang; Huaijun Ma; Min Li; Zhendong Pan; Yuxia Jiang; Zhijian Tian

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Ionic liquid assisted hydrothermal synthesis of MoS₂ double-shell polyhedral cages with enhanced catalytic hydrogenation activities

机译：离子液体辅助水热合成增强催化加氢活性的MoS _{2 双壳多面体笼}

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MoS₂ double-shell polyhedral cages are synthesized via an ionic liquid assisted hydrothermal process, in which the polyhedral cages of organic–inorganic hybrid phosphomolybdic acid-ionic liquids (PMA-ILs) are formed in situ and serve as a sacrificial template. The as-synthesized MoS₂ hierarchical polyhedral cages have a lateral length of 0.5–1.5 μm and average shell thickness of about 150 nm. The surfaces of MoS₂ double-shell polyhedral cages are very rough and composed of small nanosheets. The synthesis parameters including ionic liquid dosage, crystallization time and sulfur source are investigated to clarify the growth mechanism. Polycyclic aromatic hydrocarbons including naphthalene and anthracene were used as model compounds to evaluate the catalytic hydrogenation performance of the as-synthesized MoS₂ sample. It turns out that MoS₂ double-shell polyhedral cages manifest better catalytic hydrogenation activities than MoS₂ nanoparticles and commercial bulk MoS₂. The double-shell hollow structure and the vertical-alignment of nanosheets in the polyhedral shell are responsible for the enhanced catalytic activities of MoS₂ double-shell polyhedral cages.

机译：MoS _{2 双壳多面体笼通过离子液体辅助水热法合成，其中有机-无机杂化磷钼酸的多面体笼离子液体（PMA-IL）是在原位形成的，并用作牺牲模板。合成后的MoS _{2 分层多面体笼的侧向长度为0.5–1.5μm，平均壳厚度约为150 nm。 MoS _{2 双壳多面体笼的表面非常粗糙，由小的纳米片组成。研究了离子液体用量，结晶时间和硫源等合成参数，以阐明其生长机理。以萘和蒽等多环芳烃为模型化合物，对合成的MoS _{2 样品的催化加氢性能进行了评价。结果表明，MoS _{2 双壳多面体笼罩比MoS _{2 纳米颗粒具有更好的催化加氢活性。批量MoS _{2 。多面体壳中的双壳中空结构和纳米片的垂直排列是MoS _{2 双壳多面体笼增强催化活性的原因。}}}}}}}}

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《RSC Advances》 |2017年第38期|共7页
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Jiahe Li; Donge Wang; Huaijun Ma; Min Li; Zhendong Pan; Yuxia Jiang; Zhijian Tian;
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Ionic liquid assisted hydrothermal synthesis of MoS2 double-shell polyhedral cages with enhanced catalytic hydrogenation activities

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Ionic liquid assisted hydrothermal synthesis of MoS₂ double-shell polyhedral cages with enhanced catalytic hydrogenation activities