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Surface energy-driven ex situ hierarchical assembly of low-dimensional nanomaterials on graphene aerogels: a versatile strategy

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Abstract

Hybrid aerogels composed of functional low-dimensional nanomaterials (LDNs) and reduced graphene oxide (rGO) hold great promise in fields ranging from catalysis to energy storage and conversion. However, the challenge of developing a general strategy for the hierarchical assembly of LDNs on rGO aerogels remains unsolved. Here, we propose a surface energy-driven strategy for ex situ hierarchical assembly of LDNs on preformed rGO aerogels. This strategy is versatile and generally applicable to a broad variety of LDNs regardless of their composition, shapes, and dimensionalities. Experimental and simulation results reveal that the organically modified, energetically stable LDNs thermodynamically tend to uniformly and densely reside on the rGO aerogels, thereby reducing the surface energy of the aerogels and the free energy of the solution system. Four kinds of LDNs are successfully decorated on rGO aerogels, including 0D Mn3O4 nanocubes and Ag nanospheres, and 1D TiO2 nanochains and SnO2 nanowires. As a possible application harnessing the unique structural features of these materials, the Mn3O4@rGO hybrid aerogels were tested as anodes in lithium ion battery half cells, delivering a high reversible lithium storage capacity (1.35 mA h cm−2 at 3.5 mA cm−2) at high mass loading density (up to 7 mg cm−2).

Graphical abstract: Surface energy-driven ex situ hierarchical assembly of low-dimensional nanomaterials on graphene aerogels: a versatile strategy

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Publication details

The article was received on 29 Jul 2018, accepted on 08 Sep 2018 and first published on 10 Sep 2018


Article type: Paper
DOI: 10.1039/C8TA07338D
Citation: J. Mater. Chem. A, 2018, Advance Article
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    Surface energy-driven ex situ hierarchical assembly of low-dimensional nanomaterials on graphene aerogels: a versatile strategy

    L. Pan, P. Gao, E. Tervoort, A. M. Tartakovsky and M. Niederberger, J. Mater. Chem. A, 2018, Advance Article , DOI: 10.1039/C8TA07338D

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