Three-dimensional chitosan/graphene oxide aerogel for high-efficiency solid-phase extraction of acidic herbicides in vegetables

A simple, facile method was adopted to synthesize three-dimensional chitosan grafted graphene oxide aerogel modified silica (3D CS/GOA@Sil) as an eco-friendly, sustainable extraction material for the preconcentration of phenoxy acid herbicides.

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Stable metal anodes enabled by a labile organic molecule bonded to a reduced graphene oxide aerogel

Proceedings of the National Academy of Sciences ◽

10.1073/pnas.2001837117 ◽

2020 ◽

Vol 117 (48) ◽

pp. 30135-30141

Author(s):

Yue Gao ◽

Daiwei Wang ◽

Yun Kyung Shin ◽

Zhifei Yan ◽

Zhuo Han ◽

...

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

High Efficiency ◽

High Current Density ◽

Solid Electrolyte Interphase ◽

Metal Deposition ◽

Reduced Graphene ◽

Lithium Deposition ◽

Reduced Graphene Oxide Aerogel ◽

Graphene Oxide Aerogel

Metallic anodes (lithium, sodium, and zinc) are attractive for rechargeable battery technologies but are plagued by an unfavorable metal–electrolyte interface that leads to nonuniform metal deposition and an unstable solid–electrolyte interphase (SEI). Here we report the use of electrochemically labile molecules to regulate the electrochemical interface and guide even lithium deposition and a stable SEI. The molecule, benzenesulfonyl fluoride, was bonded to the surface of a reduced graphene oxide aerogel. During metal deposition, this labile molecule not only generates a metal-coordinating benzenesulfonate anion that guides homogeneous metal deposition but also contributes lithium fluoride to the SEI to improve Li surface passivation. Consequently, high-efficiency lithium deposition with a low nucleation overpotential was achieved at a high current density of 6.0 mA cm−2. A Li|LiCoO2cell had a capacity retention of 85.3% after 400 cycles, and the cell also tolerated low-temperature (−10 °C) operation without additional capacity fading. This strategy was applied to sodium and zinc anodes as well.

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Study on the thermal insulation performance of the core–shell skeleton graphene oxide/carbon composite aerogel

Journal of Polymer Engineering ◽

10.1515/polyeng-2021-0109 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Hongli Liu ◽

Peng Wang ◽

Wenjin Yuan ◽

Hongyan Li

Keyword(s):

Graphene Oxide ◽

Solid Phase ◽

Three Dimensional ◽

Carbon Aerogel ◽

Carbon Composite ◽

Core Shell ◽

Composite Aerogel ◽

Dimensional Network ◽

Heat Shielding ◽

Insulation Performance

Abstract Phenolic resin (PR) was grafted onto the surface of graphene oxide (GO) through π–π conjugation and chemical bonding. After carbonization, organic compounds turned into carbon layers with a thickness of about 10 nm and coated on the surface of GO formed a core–shell structure. Besides, the adiabatic interface formed during organic carbonization can effectively connect the aerogels into a three-dimensional network. The optimum mass ratio of GO was determined to be 10 wt% in the preparation of the precursor aerogel. The adiabatic interfaces (carbon) between GO lamellae could effectively reduce the solid phase heat transfer in aerogels (thermal conductivity is 0.0457 W m−1 K−1). At the same time, the existence of GO also ensured better mechanical properties of GO/carbon composite aerogel (compressive strength is 2.43 MPa) compared with the pure carbon aerogel (1.52 MPa), demonstrating the excellent heat-shielding performance and mechanical property of GO/carbon aerogel.

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Electrochemically prepared three-dimensional reduced graphene oxide-polyaniline nanocomposite as a solid-phase microextraction coating for ethion determination

Talanta ◽

10.1016/j.talanta.2019.120576 ◽

2020 ◽

Vol 209 ◽

pp. 120576 ◽

Cited By ~ 1

Author(s):

Maryam Heydari ◽

Mohammad Saraji ◽

Mohammad Taghi Jafari

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Solid Phase Microextraction ◽

Solid Phase ◽

Three Dimensional ◽

Reduced Graphene ◽

Polyaniline Nanocomposite

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Three-Dimensional Graphene Oxide-Supported Zinc Oxide Scaffold as a High-Efficiency Adsorbent for Desulfurization

NANO ◽

10.1142/s1793292020500599 ◽

2020 ◽

Vol 15 (05) ◽

pp. 2050059

Author(s):

Yan Liu ◽

Xiaojun Zhang ◽

Meiyan Yang ◽

Bowen Guo ◽

Jixiang Guo ◽

...

Keyword(s):

Zinc Oxide ◽

Graphene Oxide ◽

High Efficiency ◽

Porous Scaffold ◽

Specific Binding ◽

Three Dimensional ◽

3D Graphene ◽

Fcc Gasoline ◽

And Control ◽

Aryl Sulfides

Sulfur oxides are air pollutants derived mainly from the combustion of gasoline. Reducing the sulfur content of fluid catalytic cracking (FCC) gasoline is of key importance for the prevention and control of atmospheric pollution. We describe herein the fabrication and characterization of a porous, three-dimensional (3D) graphene oxide-supported zinc oxide (GO/ZnO) scaffold as an adsorbent for desulfurization with various model compounds and real FCC gasoline. The uniform and stable dispersion of ZnO nanoparticles on the surface of GO facilitates the specific binding of sulfides. Moreover, GO synergistically adsorbs aryl sulfides via [Formula: see text]–[Formula: see text] stacking interactions. The GO/ZnO nanosheets were further self-assembled into a 3D porous scaffold that effectively trapped sulfides and inhibited desorption. These scaffolds exhibited excellent desulfurization performance with maximum sulfur capacity up to 29.73[Formula: see text]mg S/g. This work provides a novel perspective on the fabrication of high-efficiency adsorbents for gasoline pretreatment.

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