Thermal reduction of graphene oxide in the presence of carbon suboxide

Aukštakojytė, Rūta; Gaidukevič, Justina; Barkauskas, Jurgis

doi:10.1016/j.jssc.2021.122365

Cited by 6 publications

(5 citation statements)

References 40 publications

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“…The results of GO indicated that the diffraction peak at 2θ=10.2°, assigned to the crystalline plane (002) [27] . The distinctive diffraction peak of GO corresponded to the interlayer distance of d 002 = 0.866 nm, which revealed that the oxygen‐containing functional groups bonding with the GO surface increased the distance between monolayers compared to the structure of graphite [28,29] . The XRD pattern of GOA is similar to that of GO, despite the diffraction peak (002) shifting to 2θ=9.8° (d 002 = 0.914 nm).…”

Section: Resultsmentioning

confidence: 90%

“…[27] The distinctive diffraction peak of GO corresponded to the interlayer distance of d 002 = 0.866 nm, which revealed that the oxygen-containing functional groups bonding with the GO surface increased the distance between monolayers compared to the structure of graphite. [28,29] The XRD pattern of GOA is similar to that of GO, despite the diffraction peak (002) shifting to 2θ = 9.8°(d 002 = 0.914 nm). The increase in interlayer spacing between GO laminates could have resulted from the expansion in the volume of the frozen intercalated water molecules.…”

Section: Characterization Of Materialsmentioning

confidence: 80%

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Optimization of Conditions for Removal Phenolic Compounds from Water by a Graphene Oxide Aerogel

Hieu

Hương

et al. 2022

ChemistrySelect

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In this study, graphene oxide (GO) was prepared from graphite by improved Hummers’ method. Graphene oxide aerogel (GOA) was synthesized via the ice segregation induced self‐assembly method. Various modern analytical methods were utilized to characterize GOA. The results revealed the aerogel structure with a pore size of 100–150 μm, a specific surface area of 515.21 m2/g, and a pore volume of 2.08–2.16 cm3/g. The synthesized GOA was applied as an adsorbent for the removal of phenol (PN) and bisphenol A (BPA) with a maximum adsorption capacity of 117.65 and 70.17 mg/g, respectively. Response surface methodology involving a rotating central composite design was applied to investigate simultaneously the effects of adsorption variables including adsorption time, pH, and initial concentration on the removal efficiency of GOA for PN or BPA. The results showed that the optimal adsorption efficiency for PN was 92.15 % with an adsorption time of 208.52 min, a pH of 6.08, and an initial PN concentration of 30 mg/L. Regarding BPA, the optimal adsorption efficiency was 95.27 % with an adsorption time of 352.79 min, a pH of 4.91, and an initial BPA concentration of 20 mg/L. The adsorption of both PN and BPA onto GOA was appropriate with the Langmuir model, in which the maximum adsorption capacity of GOA for PN and BPA was 117.65 and 70.175 mg/g, respectively. The results confirmed that the adsorption of PN and BPA onto GOA was monolayer adsorption on a homogeneous surface. The adsorption mechanism of GOA for PN or BPA depended mainly on the electrostatic interaction and hydrogen bonding between −OH of PN, BPA, and oxygen‐containing functional groups of GOA. Besides, π‐π interaction between carbon rings of GOA and PN or BPA also contributed to the enhancement of adsorption performance. The results showed that GOA exhibited potential application in the treatment of organic pollutants. Besides, the evaluation of the morphology of the GOA and the simultaneous effects of different factors can contribute to the advancement of graphene‐based materials and the improvement of wastewater treatment.

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Section: Resultsmentioning

confidence: 90%

Section: Characterization Of Materialsmentioning

confidence: 80%

Optimization of Conditions for Removal Phenolic Compounds from Water by a Graphene Oxide Aerogel

Hieu

Hương

et al. 2022

ChemistrySelect

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“…For comparative experiments, we prepared Ag-free precursor thin film (GC) and reduced thin film scaffold (rGC) using the same method. Both GC and GCA have typical characteristics of GO thermogravimetric curve: [39][40][41][42] when the temperature was around 190°C, a large number of oxygen-containing functional groups were reduced and consumed in precursor film. The generated water vapor, CO 2 and other gases accumulated between the graphene layers, so that the layer spacing increased.…”

Section: Resultsmentioning

confidence: 99%

Highly Stable Potassium Metal Anodes with Controllable Thickness and Area Capacity

Zhang

Cai

Zhu

et al. 2023

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K metal battery is a kind of high‐energy‐density storage device with economic advantages. However, due to the dendrite growth and difficult processing characteristics, it is difficult to prepare stable K metal anode with thin thickness and fixed area capacity, which severely limits its development. In this work, a multi‐functional 3D skeleton (rGCA) is synthesized by simple vacuum filtration and thermal reduction, and K metal anodes with controllable thickness and area capacity (K content) can be fabricated by changing the raw material mass and graphene layer spacing of rGCA. Moreover, the graphene sheet layer of rGCA can relax stress and relieve volume expansion; carbon nanotubes can serve as the fast transport channel of electrons, reducing internal impedance and local current density; Ag nanoparticles can induce the uniform nucleation and deposition of K+. The K metal composite anodes (rGCA‐K) based on the conductive skeleton can effectively suppress dendrites and exhibit excellent electrochemical performance in symmetric and full cells. The controllable fabrication process of stable K metal anode is expected to help K metal batteries move toward the stage of commercial production.

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“…Additionally, the mathematical kinetic model was determined by Borchardt-Daniels's approach. Accordingly, the mechanism is (f(α)= (1-α) 0.7 ), suggesting that the thermal degradation of GOBMs involves successive zero and first-order reactions [211].…”

Section: Kinetics Of Thermal Reduction Of Gobmsmentioning

confidence: 99%

“…Apparently, the introduction of carbon suboxide reduces the energy released from the decomposition of GOBMS. It has been found that was reduced from 1487 to 1184 KJ.g -1 ; additionally, the activation energy was decreased by about 27KJ.g -1 [211]. In a separate study, Barkauskas et al studied the influence of nitrogen-based dyes on the thermal decomposition of GOBMs.…”

Section: Reducing the Energy Released During The Reduction Of Gobmsmentioning

confidence: 99%

Correlating Heat Treatment Conditions with the Physicochemical Properties of Thermally Reduced Graphene Oxide-Based Materials: A Comprehensive Review

AKBI,

RAFAI,

MEKKI

et al. 2024

Univers. J. Carbon Res.

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The straightforward, cost-efficient, and scalable route of preparing graphene oxide-based materials (GOBMs) from graphite and transforming them into thermally reduced graphene oxide-based materials (T-RGOBMs) through heat treatment offers unparalleled versatility in customizing and refining the physicochemical properties of T-RGOBMs for various applications. To fully exploit the potential of this route, it is essential to determine the correlation between the physicochemical properties of the resulting T-RGOBMs and the preparation and heat treatment conditions of GOBMs. This article intends to provide a comprehensive discussion of the use of heat treatment routes to prepare T-RGOBMs with finely tuned physicochemical properties for specific applications. The review will focus on the key factors that can affect the end-product features, including the method of preparation of graphite oxide, the physical form of the ensuing GOBMs, and the parameters of the heat treatment process, such as temperature, heating rate, duration, atmosphere, and pressure. Furthermore, it will concentrate on the thermal transformations that take place during heat treatment, delve into the mechanisms and kinetics governing thermal decomposition, evaluate the potential risks associated with reducing GOBMs through heat treatment, and outline strategies to ensure a safe reduction process. The review will also explore recent advancements in the application of T-RGOBMs, providing examples of heat treatment strategies employed across various fields, including supercapacitors, gas sensing, and interference shielding. It serves as a useful guide for researchers and practitioners looking to appropriately prepare GOBMs and safely utilize the heat treatment to fine-tune their properties toward specific applications.

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Thermal reduction of graphene oxide in the presence of carbon suboxide

Cited by 6 publications

References 40 publications

Optimization of Conditions for Removal Phenolic Compounds from Water by a Graphene Oxide Aerogel

Optimization of Conditions for Removal Phenolic Compounds from Water by a Graphene Oxide Aerogel

Highly Stable Potassium Metal Anodes with Controllable Thickness and Area Capacity

Correlating Heat Treatment Conditions with the Physicochemical Properties of Thermally Reduced Graphene Oxide-Based Materials: A Comprehensive Review

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