Direct 3D Printing of Ultralight Graphene Oxide Aerogel Microlattices

Jiang, Yanqiu; Xu, Zhen; Huang, Tieqi; Liu, Yingjun; Guo, Fangwei; Xi, Jiabin; Gao, Weiwei

doi:10.1002/adfm.201707024

Cited by 302 publications

(294 citation statements)

References 50 publications

Supporting

Mentioning

283

Contrasting

Order By: Relevance

“…Depending on building material, strength of the bonds between forming particles/rods/sheets and presence of the dopants in the porous matrix, aerogels can be applied as adsorbents [2], filters [3], catalysts [4,5] or sensors [5,6]. Among the others, graphene oxide (GO) is one of the most interesting building materials for aerogel structures [7], which thanks to the high specific surface area and threedimensional structure can be applied as electrodes in supercapacitors [8,9]. The typical process of the aerogel formation from colloidal dispersion of GO sheets is based on the hydrothermal reduction in oxygen functional groups, which leads to cross-linking of individual graphene oxide sheets into partially reduced graphene oxide (prGO) hydrogel structure [10,11].…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of partially reduced graphene oxide aerogels doped with transition metal ions

et al. 2018

View full text Add to dashboard Cite

This work presents the preparation and characterization of pristine and transition metal doped partially reduced graphene oxide aerogels. The step-by-step preparation of aerogels from graphene oxide with an assistance of VCl 3 , CrCl 3 , FeCl 2 Á4H 2 O, CoCl 2 , NiCl 2 and CuCl 2 chlorides as reducing agents is shown and explained. The influence of reducing agents on the structural and magnetic properties of prepared aerogels is investigated. The use of electron paramagnetic resonance in purification during synthesis of GO and characterization afterwards is shown. It was found that VCl 3 was the strongest reducing agent leading to the formation of the most dense reduced graphene oxide aerogel, whereas vanadium is visible in EPR spectrum in form of V 4? complex as a VO 2?groups.

show abstract

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of partially reduced graphene oxide aerogels doped with transition metal ions

et al. 2018

View full text Add to dashboard Cite

show abstract

“…The Raman spectra of GO and RGO revealed the characteristic peaks located at 1590 cm −1 (graphite band, G‐band) and 1350 cm −1 (defect band, D ‐band) (Figure b). The intensity ratio of D‐band and G‐band ( I D / I G ) increased from 0.94 (for GO) to 1.10 (for RGO), resulting from chemical reduction and indicating the increase of defects . The elemental analysis revealed that the atomic ratio of C/O increased from 0.73 (for GO) to 1.28 (for RGO) (Table S1).…”

Section: Resultsmentioning

confidence: 93%

“…Thei ntensity ratio of D-band and G-band (I D /I G )i ncreasedf rom 0.94 (for GO) to 1.10 (for RGO), resulting from chemicalr eduction and indicating the increase of defects. [33] The elemental analysisr evealed that the atomic ratio of C/O increasedf rom 0.73 (for GO) to 1.28 (for RGO) (Table S1). XPS was employed to investigate the surface chemical composition of RGO (Figure 4c-e).…”

Section: Resultsmentioning

confidence: 98%

Photothermal Conversion Material Derived from Used Cigarette Filters for Solar Steam Generation

Sun

Zhu

et al. 2019

ChemSusChem

View full text Add to dashboard Cite

Solar steam generation by photothermal materials has recently emerged as a new and feasible approach to effectively harvest solar energy in a variety of applications. This work reports an efficient heat localization material based on the renewable cellulose acetate cigarette filters and a reduced graphene oxide coating (RGO‐CF) as the light‐to‐heat conversion layer for solar steam generation. RGO‐CF possessed an aligned structure with superhydrophilic nature, lower thermal conductivity (0.0733 Wm−1 K−1), and broad light adsorption (≈100 %). These characteristics enable rapid water transportation and excellent light‐to‐heat conversion by the resulting RGO‐CF with an energy conversion efficiency of 94 % under stimulated solar illumination (1 kW m−2), which demonstrates that RGO‐CF is a promising photothermal conversion material for solar steam generation. Such strategy for preparation of photothermal materials not only reduces the fabrication cost but also provides a fundamental guidance for the practical application of renewable polymer resources from used cigarette filters.

show abstract

“…Although not directly related to printable ink formulations, the recent work of Deng et al, discussed in section 4.3.1, showing cation-induced gelation of MXene hydrogels [54], introduces another promising way of developing MXene-based inks with desirable rheology, with the possibility of using additives that can actually tune and enhance their electrochemical properties after processing. A cation-induced gelation with trace addition of Ca 2+ ions was already successfully demonstrated to directly print self-standing graphene aerogel microlattices from GO-based ink and this approach could be a good base to explore MXene-based inks [94].…”

Section: Additive Manufacturingmentioning

confidence: 99%

MXene-based 3D porous macrostructures for electrochemical energy storage

et al. 2020

View full text Add to dashboard Cite

2D transition metal carbides and nitrides (MXenes) have shown outstanding potential as electrode materials for energy storage applications due to a combination of metallic conductivity, wide interlayer spacing, and redox-active, metal oxide-like surfaces capable of exhibiting pseudocapacitive behavior. It is well known that 2D materials have a strong tendency to restack and aggregate, due to their strong van der Waals interactions, reducing their surface availability and inhibiting electrochemical performance. In order to overcome these problems, work has been done to assemble 2D materials into 3D porous macrostructures. Structuring 2D materials in 3D can prevent agglomeration, increase specific surface area and improve ion diffusion, whilst also adding chemical and mechanical stability. Although still in its infancy, a number of papers already show the potential of 3D MXene architectures for energy storage, but the impact of the processing parameters on the microstructure of the materials, and the influence this has on electrochemical properties is still yet to be fully quantified. In some situations the reproducibility of works is hindered by an oversight of parameters which can, directly or indirectly, influence the final architecture and its properties. This review compiles publications from 2011 up to 2020 about the research developments in 3D porous macrostructures using MXenes as building blocks, and assesses their application as battery and supercapacitor electrodes. Recommendations are also made for future works to achieve a better understanding and progress in the field. carbon and/or nitrogen and T x represents surface terminations which vary depending on the synthesis method used (for example, hydroxyl, oxygen, or fluorine) [10].With less than 10 years since their discovery, efforts are still mainly pointed towards the assessment of its potentialities and exploration of its properties, while their integration and application in various engineering fields are still very much in their infancy. Nevertheless, investigations have shown very competitive results in energy storage devices attracting a lot of interest in the field. In particular, the inner conductive metal carbide layers provide fast electron supply to electrochemically active sites, and functional groups on the surface, allow water intercalation and fast redox activity for pseudocapacitive energy storage [11][12][13]. Besides energy storage, MXenes also showed promising properties and have been researched for a variety of other areas, such as electromagnetic shielding, environmental, sensors, optoeletronic devices, and renewable energy [9,[14][15][16].For most practical applications, the MXene powders must be assembled or processed into a macroscopic sample such as, for example, an electrode. Conventionally this is done either by mixing it with a solvent to form a slurry which is painted over a substrate, by directly vacuum filtration, by spin coating, or by spraying the MXene suspension to form a compact film. During these processes, there i...

show abstract

Direct 3D Printing of Ultralight Graphene Oxide Aerogel Microlattices

Cited by 302 publications

References 50 publications

Preparation and characterization of partially reduced graphene oxide aerogels doped with transition metal ions

Preparation and characterization of partially reduced graphene oxide aerogels doped with transition metal ions

Photothermal Conversion Material Derived from Used Cigarette Filters for Solar Steam Generation

MXene-based 3D porous macrostructures for electrochemical energy storage

Contact Info

Product

Resources

About