Polarized ATR-IR spectroscopy for the identification of material structure: The case of graphene oxide

Botella, Romain; Piñeiro-García, Alexis; Semetey, Vincent; Lefèvre, Grégory

doi:10.1016/j.matlet.2022.132352

Cited by 14 publications

(3 citation statements)

References 21 publications

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“…At wavenumbers higher than 2900 cm − 1 the broad peak is assigned to vibrations of structurally bound hydroxyl groups or even from adsorbed water molecules, as the oxygen functional groups in GO permit good interaction of the material with polar solvents. [30,31] The FTIR spectrum of rGO (orange) shows a lack of peaks related to functional groups, indicating that the electrochemical process is e cient at removing most of them, although there are some weak residual peaks that are still observable. Moreover, a weak peak at 1549 cm − 1 is evident and this is assigned to the vibration of double bonds between sp 2 carbon atoms that constitute the graphitic structure that is only noticeable due to defects in their vicinities, inducing a difference in the dipole moment between the atoms.…”

Section: Rgo Preparation and Characterizationmentioning

confidence: 99%

Electrochemical determination of fenuron herbicide in environmental water samples by electro-reduced graphene oxide sensor

Borges,

Breslin,

Nossol

2024

J Appl Electrochem

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Fenuron (FEN) is a herbicide that acts as a weed growing inhibitor in crops. Due to its persistence and good solubility in water, its presence in water bodies is emerging as a concern for aquatic species. Herein, we propose a simple development of an electrochemically reduced graphene oxide (rGO) sensor for the monitoring of FEN in water samples. The electrochemical determination of FEN showed the best performance in a 0.1 mol L − 1 NaCl solution (pH = 2.5). Differential pulse voltammetry (DPV) was performed using optimal parameters and resulted in two linear ranges (0.4-12 µmol L − 1 and 20 to 50 µmol L − 1 ) with high sensitivities of 6.83 and 1.9 µA µmol − 1 L, respectively, and a low LD of 0.34 µmol L − 1 . Stability, reproducibility, and interference tests showed that rGO is su ciently reliable to be used as a sensor of FEN in real samples. Spiked tap and canal water samples returned recoveries close to 100%, exhibiting no statistically signi cant difference when compared to a UV-Vis method by an average paired t-test, attesting the viability of the rGO modi ed electrode as a promising sensor of FEN in environmental water samples.

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Section: Rgo Preparation and Characterizationmentioning

confidence: 99%

Electrochemical determination of fenuron herbicide in environmental water samples by electro-reduced graphene oxide sensor

Borges,

Breslin,

Nossol

2024

J Appl Electrochem

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“…[14] The epoxide group is located at borders and basal plane of the GO, and our research group recently reported a strategy to distinguish both contributions by polarized ATR-FTIR spectroscopy. [27] Most of the epoxides are situated in the basal plane where steric hindrance plays an important role. In order to have access to the major quantity of epoxides, the concentration of GO should be reduced so as to achieve the highest exposed surface area, as suggested previously.…”

Section: Classic Chemical Routes To Functionalize Graphene Oxidementioning

confidence: 99%

“…The first group to mention is the epoxide that exists in the higher concentration in the GO layers [14] . The epoxide group is located at borders and basal plane of the GO, and our research group recently reported a strategy to distinguish both contributions by polarized ATR‐FTIR spectroscopy [27] . Most of the epoxides are situated in the basal plane where steric hindrance plays an important role.…”

Section: Classic Chemical Routes To Functionalize Graphene Oxidementioning

confidence: 99%

The “How” and “Where” Behind the Functionalization of Graphene Oxide by Thiol‐ene “Click” Chemistry

Piñeiro-García

Semetey

2023

Chemistry A European J

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Graphene oxide (GO) is a 2D nanomaterial with unique chemistry due to the combination of sp2 hybridization and oxygen functional groups (OFGs) even in single layer. OFGs play a fundamental role in the chemical functionalization of GO to produce GO‐based materials for diverse applications. However, traditional strategies that employ epoxides, alcohols, and carboxylic acids suffer from low control and undesirable side reactions, including by‐product formation and GO reduction. Thiol‐ene “click” reaction offers a promising and versatile chemical approach for the alkene functionalization (−C=C−) of GO, providing orthogonality, stereoselectivity, regioselectivity, and high yields while reducing by‐products. This review examines the chemical functionalization of GO via thiol‐ene “click” reactions, providing insights into the underlying reaction mechanisms, including the role of radical or base catalysts in triggering the reaction. We discuss the “how” and “where” the reaction takes place on GO, the strategies to avoid unwanted side reactions, such as GO reduction and by‐product formation. We anticipate that multi‐functionalization of GO via the alkene groups will enhance GO physicochemical properties while preserving its intrinsic chemistry.

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Oxidation of glucose to glycolic acid using oxygen and pyrolyzed spent Li-ion battery electrode material as catalyst

Amarasekara

Herath

Grady

et al. 2022

Applied Catalysis A: General

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Polarized ATR-IR spectroscopy for the identification of material structure: The case of graphene oxide

Cited by 14 publications

References 21 publications

Electrochemical determination of fenuron herbicide in environmental water samples by electro-reduced graphene oxide sensor

Electrochemical determination of fenuron herbicide in environmental water samples by electro-reduced graphene oxide sensor

The “How” and “Where” Behind the Functionalization of Graphene Oxide by Thiol‐ene “Click” Chemistry

Oxidation of glucose to glycolic acid using oxygen and pyrolyzed spent Li-ion battery electrode material as catalyst

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