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Research Article

Metallo-aerogels derived from chitosan with encapsulated metal nanoparticles as robust, efficient and selective nanocatalysts towards reduction of nitroarenes

Yajing Shen1, Qingshu Zheng1, Jianhong Liu1, Tao Tu1,2,3( )
Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200438, China
State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Kexue avenue, Zhengzhou 450001, China
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Abstract

A series of robust metallo-aerogels are readily fabricated by pyrolysis of xerogels derived from chitosan-metal (M = Fe, Co, Ni) hydrogels. Owing to the strong coordination between metal ions and the functional groups (NH2 and OH) of chitosan, metallo-aerogels consisting of encapsulated metal-nanoparticles (MNPs) by graphite shells were obtained, as supported by various characterizations including high-resolution transmission electron microscope (HR-TEM), X-ray diffraction (XRD), and Raman. The resulting metallo-aerogels could be functioned as highly stable, efficient and selective nanocatalysts towards the hydrogenation of nitroarenes to amines at low catalyst loading (1.2 mol.%-2.4 mol.%). Remarkably, the metallo-aerogels could be reused for more than 30 runs without obvious loss of activity and selectivity. These distinguished performances were attributed to the graphitic shells formed during the pyrolysis, which hampered the possible aggregation of MNPs, prevented metal leaching and increased their stability.

Keywords

pyrolysisreductionmetallo-aerogelsnanocatalystsnitroarenes

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Nano Research
Volume 14 Issue 1,
January 2021
Pages 59-65
DOI: 10.1007/s12274-020-3040-1
Cite this article:
Shen Y, Zheng Q, Liu J, et al. Metallo-aerogels derived from chitosan with encapsulated metal nanoparticles as robust, efficient and selective nanocatalysts towards reduction of nitroarenes. Nano Research, 2021, 14(1): 59-65. https://doi.org/10.1007/s12274-020-3040-1
Topics:
AerogelsMetal ionsMetal nanoparticlesMetalsNanocatalysts

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Received: 25 March 2020
Revised: 05 August 2020
Accepted: 05 August 2020
Published: 05 January 2021
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature
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