NDLI: A novel core–shell nanocomposite Ni–Ca@mSiO$_{2}$ for benzophenone selective hydrogenation

Content Provider	Springer Nature Link
Author	Han, Xue Feng, Wenhui Chu, Xiaoning Chu, Hailong Niu, Libo Bai, Guoyi
Copyright Year	2017
Abstract	A novel core–shell nanocomposite Ni–Ca@mSiO$_{2}$ was first prepared by a modified Stöber method in this paper. It has a core–shell structure with Ni (about 8 nm in diameter) and Ca as the cores and mesoporous silica as the outer shell, as proven by the transmission electron microscopy. This nanocomposite exhibited good catalytic performance in the selective hydrogenation of benzophenone, with 96.1% conversion and 94.9% selectivity for benzhydrol under relatively mild reaction conditions. It was demonstrated that addition of small amounts of alkaline Ca can not only markedly improve the dispersion of the active species but also tune the acid–base property of this nanocomposite, resulting in the efficient suppression of benzhydrol dehydration to achieve a high selectivity. Furthermore, the core–shell nanocomposite Ni–Ca@mSiO$_{2}$ can be recycled four runs without appreciable loss of its initial activity, more stable than the traditional supported nanocatalyst Ni–Ca/mSiO$_{2}$. It was suggested that the outer mesoporous silica shell of Ni–Ca@mSiO$_{2}$ can prevent both the aggregation and the leaching of the active Ni species, accounting for its relatively good stability. Graphical abstract A magnetic core–shell nanocomposite Ni–Ca@mSiO2 exhibited good activity, selectivity, and reusability in benzophenone selective hydrogenation.
Starting Page	1
Ending Page	12
Page Count	12
File Format	PDF
ISSN	13880764
Journal	Journal of Nanoparticle Research
Volume Number	19
Issue Number	2
e-ISSN	1572896X
Language	English
Publisher	Springer Netherlands
Publisher Date	2017-02-21
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Core–shell Nanocomposite Hydrogenation Benzophenone Acid–base property Nanotechnology Inorganic Chemistry Characterization and Evaluation of Materials Physical Chemistry Optics, Lasers, Photonics, Optical Devices
Content Type	Text
Resource Type	Article
Subject	Chemistry Nanoscience and Nanotechnology Atomic and Molecular Physics, and Optics Condensed Matter Physics Bioengineering Modeling and Simulation

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