Thermal synthesis of rGO and rGO-Co3O4 and their application as adsorbents for anionic dye removal

Assis, Aluiz M.A.D.; Silva, Karolyne S. da; Araújo, Maysa K.S.; Sales, Deivson Cesar Silva; Ferreira, Maryanne Chaves; Araújo, Ana Cláudia Vaz de; Azevêdo, W.M. de; Falcão, Eduardo H.L.

doi:10.1016/j.colsurfa.2020.124837

Cited by 17 publications

(3 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, careful consideration of the desired properties is necessary to select the appropriate annealing atmosphere for a specific application. Several atmospheres were employed including, inert gases like Nitrogen (N 2 ) [139,147] and Argon [148], oxidizing atmospheres such as ambient air [19,149,150], reducing atmospheres such as Hydrogen (H 2 ) [151], mixed gases atmospheres like Argon-Hydrogen (Ar-H 2 ) [152][153][154], and Ultra-high-vacuum (UHV) [118]. UHV has been recognized as the optimal environment for thermally annealing GOBMs, generating almost oxygen-free T-RGOBMs without the introduction of impurities.…”

Section: Effect Of Annealing Atmospherementioning

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.

View full text Add to dashboard Cite

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.

show abstract

Section: Effect Of Annealing Atmospherementioning

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.

View full text Add to dashboard Cite

show abstract

“…However, these analyses demand exhaustive procedures, difficulties in carrying out in situ measurements, expensive reagents and equipment, the need for qualified operators, and the requirement for several samples, which are prepared through steps such as extraction, cleaning and pre-concentration [11,12]. In contrast to these, electrochemical techniques show a quicker detection, high sensitivity, selectivity and low measurement costs when compared to other methods [13]. The insertion of chemically active materials on the surface of electrodes can further increase the analytical response and electrochemical stability.…”

Section: Introductionmentioning

confidence: 99%

Reduced Graphene Oxide‐based Sensor for 17α‐Ehinylestradiol Voltammetric Determination in Wastewater, Tablets and Synthetic Urine Samples

et al. 2022

View full text Add to dashboard Cite

The following study reports the development of modified electrode with reduced graphene oxide (ErGO) for the voltammetric determination of 17α‐ethinylestradiol (EE2). The structural and morphological characterizations of the rGO were carried out by FTIR, Raman, UV‐Vis, TEM and SEM, and showed the typical formation of the nanomaterial. Electrochemical analyses were performed using Differential Pulse Voltammetry (DPV). Under optimized conditions, an analytical curve was generated for the sensor, which presented a linear dynamic range (LDR) from 0.04 to 8.28 μmol L−1 (R2=0.9999), with limit of detection (LOD) of 6.79 nmol L−1 and limit of quantification (LOQ) of 22.60 nmol L−1. The reproducibility and repeatability studies showed relative standard deviations (RSD) of 2.31 % and 5.23 %, respectively. ErGO was used to determine EE2 in wastewater, tablets, and synthetic urine samples with recovery values between 94.8 % and 110.1 %. The results obtained with ErGO show that the developed sensor can be used for the identification and quantification of EE2 in several matrices, due the excellent analytical performance presented.

show abstract

“…Due to the hydrophobic nature of graphene, hydrophilic graphene derivatives, such as graphene oxide (GO) and reduced graphene oxide (RGO), have been more extensively used in the development of electrochemical sensors. RGO and GO have a similar structure to graphene [22,23], though, in contrary to graphene, they contain residual oxygen-containing groups and have some structural defects, predominantly in the basal plane [24,25]; however, their performance is satisfactory enough to be utilized for practical applications [23,26]. When comparing the properties of graphene with GO and RGO, the latter behaves as an intermediate state between graphene and GO [23].…”

Section: Introductionmentioning

confidence: 99%

Electroanalytical Study of Fungicide Bixafen on Paste Electrode Based on the Thermally Reduced Graphene Oxide Synthesized in Air Conditions and its Determination in River Water Samples

et al. 2022

View full text Add to dashboard Cite

An electrochemical study of the fungicide bixafen using a paste electrode based on thermally reduced graphene oxide (TRGOPE) synthesized in air is presented for the first time. Cyclic voltammetry and square-wave voltammetry (SWV) were conducted to characterize the mechanism of the underlying electrode process of bixafen. Optimization of the procedure for the quantitative determination of bixafen was carried out by SWV. Excellent electroanalytical performance in terms of a limit of detection of 31.5 nmol L À 1 was achieved. The TRGOPE was effectively employed to analyze bixafen in spiked river and tap water samples. The selectivity towards bixafen determination was also assessed.

show abstract

Thermal synthesis of rGO and rGO-Co3O4 and their application as adsorbents for anionic dye removal

Cited by 17 publications

References 55 publications

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

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

Reduced Graphene Oxide‐based Sensor for 17α‐Ehinylestradiol Voltammetric Determination in Wastewater, Tablets and Synthetic Urine Samples

Electroanalytical Study of Fungicide Bixafen on Paste Electrode Based on the Thermally Reduced Graphene Oxide Synthesized in Air Conditions and its Determination in River Water Samples

Contact Info

Product

Resources

About