Self-assembly of 2D MnO<sub>2</sub>nanosheets into high-purity aerogels with ultralow density

Liu, Zhenning; Xu, Kongliang; She, Ping; Yin, Shengyan; Zhu, Xuedong; Sun, Hang

doi:10.1039/c5sc03217b

Cited by 41 publications

(24 citation statements)

References 59 publications

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“…This process had been introduced in 2012 together with model of a belt-like growth27. Meanwhile, the working principle of the CVD synthesis was confirmed by other authors282930. By modifying the CVD parameters several variants can be synthesized, which differ in walls morphology (closed or open) and/or inner graphitic fillings27.…”

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confidence: 85%

Nanomechanics of individual aerographite tetrapods

et al. 2017

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Carbon-based three-dimensional aerographite networks, built from interconnected hollow tubular tetrapods of multilayer graphene, are ultra-lightweight materials recently discovered and ideal for advanced multifunctional applications. In order to predict the bulk mechanical behaviour of networks it is very important to understand the mechanics of their individual building blocks. Here we characterize the mechanical response of single aerographite tetrapods via in situ scanning electron and atomic force microscopy measurements. To understand the acquired results, which show that the overall behaviour of the tetrapod is governed by the buckling of the central joint, a mechanical nonlinear model was developed, introducing the concept of the buckling hinge. Finite element method simulations elucidate the governing buckling phenomena. The results are then generalized for tetrapods of different size-scales and shapes. These basic findings will permit better understanding of the mechanical response of the related networks and the design of similar aerogels based on graphene and other two-dimensional materials.

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confidence: 85%

Nanomechanics of individual aerographite tetrapods

et al. 2017

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“…[145,149] Thef inal materials are efficient absorbents for removing toxic vapors from air. [145,149] Thef inal materials are efficient absorbents for removing toxic vapors from air.…”

Section: Gels From Oxide Nanoparticlesmentioning

confidence: 99%

Modern Inorganic Aerogels

et al. 2017

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Essentially, the term aerogel describes a special geometric structure of matter. It is neither limited to any material nor to any synthesis procedure. Hence, the possible variety of materials and therefore the multitude of their applications are almost unbounded. In fact, the same applies for nanoparticles. These are also just defined by their geometrical properties. In the past few decades nano-sized materials have been intensively studied and possible applications appeared in nearly all areas of natural sciences. To date a large variety of metal, semiconductor, oxide, and other nanoparticles are available from colloidal synthesis. However, for many applications of these materials an assembly into macroscopic structures is needed. Here we present a comprehensive picture of the developments that enabled the fusion of the colloidal nanoparticle and the aerogel world. This became possible by the controlled destabilization of pre-formed nanoparticles, which leads to their assembly into three-dimensional macroscopic networks. This revolutionary approach makes it possible to use precisely controlled nanoparticles as building blocks for macroscopic porous structures with programmable properties.

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“…Aerogel MnO 2 with ultralow density (~0.5 mg·cm −3 ) was prepared from nanosheet colloids via an ice-template method for use as an effective absorbent for toxic reducing gas [96]. …”

Section: Synthesis Of Mno2 Nanomaterialsmentioning

confidence: 99%

Nanostructured MnO2 as Electrode Materials for Energy Storage

2017

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Manganese dioxides, inorganic materials which have been used in industry for more than a century, now find great renewal of interest for storage and conversion of energy applications. In this review article, we report the properties of MnO2 nanomaterials with different morphologies. Techniques used for the synthesis, structural, physical properties, and electrochemical performances of periodic and aperiodic frameworks are discussed. The effect of the morphology of nanosized MnO2 particles on their fundamental features is evidenced. Applications as electrodes in lithium batteries and supercapacitors are examined.

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Self-assembly of 2D MnO₂nanosheets into high-purity aerogels with ultralow density

Abstract: Organic-free MnO2 aerogels with ultralow density have been achieved by self-assembly of two dimensional MnO2 nanosheets via an ice-templating approach.

Cited by 41 publications

References 59 publications

Nanomechanics of individual aerographite tetrapods

Nanomechanics of individual aerographite tetrapods

Modern Inorganic Aerogels

Nanostructured MnO2 as Electrode Materials for Energy Storage

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Self-assembly of 2D MnO2nanosheets into high-purity aerogels with ultralow density

Abstract: Organic-free MnO2 aerogels with ultralow density have been achieved by self-assembly of two dimensional MnO2 nanosheets via an ice-templating approach.

Cited by 41 publications

References 59 publications

Nanomechanics of individual aerographite tetrapods

Nanomechanics of individual aerographite tetrapods

Modern Inorganic Aerogels

Nanostructured MnO2 as Electrode Materials for Energy Storage

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Product

Resources

About

Self-assembly of 2D MnO₂nanosheets into high-purity aerogels with ultralow density