Abstract
Recently, 3D graphene aerogels (3GAs) with high electrical conductivity, excellent mechanical properties, and fast mass and electron transport have attracted increasing attention and shown wide applications (such as flexible electronics devices, sensors, absorbents, catalysis, energy storage devices, solar steam generation devices, and so on). The drying process becomes an important factor limiting the large-scale preparation of 3GAs. Therefore, how to simplify the preparation process plays an important role in the large-scale application of 3GAs. In this study, we summarize the recent progresses of 3GAs by different drying methods and focus on the effect of robust graphene network on the simple preparation of 3GAs. Besides, the design and synthesis strategies of 3GAs with robust graphene network structures have been systematically discussed. Finally, the emerging challenges and prospective for developing simple preparation and functionalization of 3GAs were outlined. It is expected that our study will lay a foundation for large-scale preparation and application of 3GAs and inspire more new ideas in this field.
Highlights
The aerogel is a kind of three-dimensional porous material prepared from a precursor by a sol–gel process and a suitable drying method
Simple Preparation of 3D Graphene Aerogels conventional porous materials cannot offer (Lu et al, 2016; Huo et al, 2019; Li et al, 2019). 3D graphene aerogels (3GAs) can be used in a range of applications including flexible electronics devices (Qiu et al, 2014), sensors (Qiu et al, 2016; Kong et al, 2021), absorbents (Bi et al, 2012), catalysis (Liang et al, 2018), energy storage devices (Jiang et al, 2017; Qu et al, 2020), and solar steam generation devices (Zhang et al, 2017; Yang et al, 2018; Huo et al, 2019; Li et al, 2021)
Compared with the SiO2 aerogel network composed of Si-O covalent bonds, the 3GA is constructed by graphene sheets through π–π interaction, and the graphene sheets are prone to slip during supercritical drying, resulting in a larger volume shrinkage and a larger density (Zhang et al, 2011; Sui et al, 2012; Huang et al, 2013a)
Summary
The aerogel is a kind of three-dimensional porous material prepared from a precursor by a sol–gel process and a suitable drying method. Since the 2010 Nobel Prize in Physics honored “the new 2D graphene material”, the atomic-thick graphene has attracted significant attention because of its unprecedented properties such as high electrical conductivity, excellent mechanical properties, high thermal conductivity, and high surface area (Novoselov et al, 2005). Great efforts have been made to prepare a new family of 3GAs with extraordinary performances such as high electrical conductivity, excellent mechanical properties, and fast mass and electron transport, which. Simple Preparation of 3D Graphene Aerogels conventional porous materials cannot offer (Lu et al, 2016; Huo et al, 2019; Li et al, 2019). Simple Preparation of 3D Graphene Aerogels conventional porous materials cannot offer (Lu et al, 2016; Huo et al, 2019; Li et al, 2019). 3GAs can be used in a range of applications including flexible electronics devices (Qiu et al, 2014), sensors (Qiu et al, 2016; Kong et al, 2021), absorbents (Bi et al, 2012), catalysis (Liang et al, 2018), energy storage devices (Jiang et al, 2017; Qu et al, 2020), and solar steam generation devices (Zhang et al, 2017; Yang et al, 2018; Huo et al, 2019; Li et al, 2021)
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