Stepwise rapid electrolytic synthesis of graphene oxide for efficient adsorption of organic pollutants

Xu, Wenqing; Zhu, Wenjie; Shen, Junliang; Kuai, Mingyue; Zhang, Yi; Huang, Weihong; Yang, Wenming; Li, Mengmeng; Yang, Sheng

doi:10.1039/d2nr06617c

Cited by 3 publications

(3 citation statements)

References 52 publications

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“…Of note, two peaks at 1346 cm −1 (D band) and 1599 cm −1 (G band) over the GO/WO 3 were observed, and the corresponding intensity ratio of I D /I G was 1.12 (Figure 1c). 40 Moreover, the bending vibrations of the ν(O−W−O) group and the stretching vibrations of the ν(O−W−O) group over the WO 3 were also observed in our as-fabricated WO 3 and GO/WO 3 . 41,42 As depicted in Figure 1d, the WO 3 and GO/WO 3 contain W−O and W−O−W bonds.…”

Section: Resultssupporting

confidence: 61%

“…The diffraction peaks at 2θ of 23.4, 23.9, 24.7, and 34.5° in all samples are sequentially indexed to (002), (020), (200), and planes of monoclinic WO 3 (JCPDS 43–1035). , However, the diffraction peak related to GO over the as-fabricated GO/WO 3 photoanode was not observed, which may be due to the diffraction summit of GO was masked by the XRD diffraction peaks of WO 3 crystals with higher crystallinity. Of note, two peaks at 1346 cm −1 (D band) and 1599 cm −1 (G band) over the GO/WO 3 were observed, and the corresponding intensity ratio of I D / I G was 1.12 (Figure c) . Moreover, the bending vibrations of the ν(O–W–O) group and the stretching vibrations of the ν(O–W–O) group over the WO 3 were also observed in our as-fabricated WO 3 and GO/WO 3 . , As depicted in Figure d, the WO 3 and GO/WO 3 contain W–O and W–O–W bonds .…”

Section: Resultssupporting

confidence: 58%

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Graphene Oxide Covered WO₃ Nanosheet Arrays as Photoelectrode for Photoelectrochemical Detection of Trace H₂O₂

Du,

Jia,

Zhang

et al. 2024

ACS Appl. Nano Mater.

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Accurate detection of trace hydrogen peroxide (H 2 O 2 ) by the anode photoelectrochemical (PEC) method is highly attractive in the modern chemical industry. However, the sluggish hole migration kinetics in photocatalysts are severely unfavorable for hole enrichment on the photoanodic surface, limiting the method's sensitivity and detection limit in practical applications. Herein, we proposed graphene oxide (GO) with high conductivity as cocatalyst to capture and aggregate hole tactics for tackling this formidable mission. As a proof of concept, GO covered tungsten trioxide (WO 3 ) nanosheet arrays as photoelectrode were selected and cast as a prototype. The as-synthesized WO 3 nanosheet only showed a thickness of 120−140 nm. Optical and structural characterizations demonstrate that GO was validated to accelerate the oxidation of H 2 O 2 to O 2 rather than • OH by improving the hole density on the surface of GO/WO 3 and reducing the overpotential of H 2 O 2 decomposition. Subsequently, it helps to boost the oxidation current of H 2 O 2 on the GO/WO 3 photoanode (24.7 μA cm −2 in 2 mM H 2 O 2 ) at a lower potential of 0.7 V vs RHE. As a result, the lower minimum detection limit and sensitivity of H 2 O 2 detection by the GO/WO 3 photoanode are up to 0.1 mM and 8.14 μA cm −2 mM −1 , respectively, which are 0.25 (0.4 mM) and 2.91 (2.79 μA cm −2 mM −1 ) times sensitive than that of WO 3 photoanode. This work affords a strategy to boost the sensitivity and detection limit of trace H 2 O 2 detection, which may have applications in biological analysis and the early detection of diseases.

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Section: Resultssupporting

confidence: 61%

Section: Resultssupporting

confidence: 58%

Graphene Oxide Covered WO₃ Nanosheet Arrays as Photoelectrode for Photoelectrochemical Detection of Trace H₂O₂

Du,

Jia,

Zhang

et al. 2024

ACS Appl. Nano Mater.

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“…There are several works in literature dealing with the electrochemical exfoliation of graphene oxide (EGO), These studies have offered insights into various methodologies and techniques for achieving effective electrochemical exfoliation of GO. [65][66][67][68][69][70][71] However, the current article focusing on the Intercalation-Exfoliation process, differently from previous works, uniquely capitalizes on the combined I-E approach, harnessing its inherent benefits such as controlled layer separation, improved scalability, and enhanced exfoliation efficiency. By underscoring these differentiating factors, we highlight the potential of the approach for efficient GO exfoliation and subsequent applications.…”

Section: àmentioning

confidence: 99%

Electrochemical Exfoliation of Graphene Oxide: Unveiling Structural Properties and Electrochemical Performance

Gutiérrez‐Pineda,

Subrati,

Rodríguez‐Presa

et al. 2023

Chemistry A European J

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An electrochemical exfoliation method for the production of graphene oxide and its characterization by electrochemical techniques are presented here. Graphite rods are used as working electrode in a three‐electrode electrochemical cell, and electro‐exfoliation is achieved by applying anodic polarization in a sulfuric acid solution. The electrochemical process involved two steps characterized by an intercalation at lower potential and an exfoliation at higher potential. The electrochemical behavior of the produced GO is studied through cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). X ray Photoelectronic Spectroscopy (XPS), Raman spectroscopy, Transmission Electron Microscopy (TEM), and Atomic Force Microscopy (AFM) are employed to characterize the structural and chemical properties of the synthesized GO. The results demonstrate that the electrochemical exfoliation method yieldsd GO materials with varying degrees of oxidation, defect density, and crystallite size, depending on the applied potential and acid concentration. The graphene oxide samples exhibite distinct electrochemical properties, including charge transfer resistance, interfacial capacitance, and relaxation times for the charge transfer, as revealed by CV and EIS measurements with a specifically selected redox probe. The comprehensive characterization provides valuable insights into the structure‐property relationships of the GO materials synthesized through electrochemical exfoliation of graphite

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High aspect ratio graphene oxide: a highly efficient plasmid DNA deliverer for plant seed

Jiang,

Pan,

et al. 2024

Preprint

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Plant genetic engineering plays a central role in crop improvement and the biosynthesis of natural products. However, the plant cell wall serves as a natural barrier that restricts the efficient delivery of exogenous biomolecules, particularly the direct transfer of plasmid DNA into plant seeds. Here, we introduce a novel form of graphene oxide characterized by a high aspect ratio, synthesized through low-voltage, low-current, and prolonged electrochemical oxidation in a 0.5 mol/L NaOH aqueous solution. The high aspect ratio graphene oxide (HARGO) can effectively deliver plasmid DNA to Poa crymophila Keng seeds, achieving a 90% success rate. Furthermore, it is effective for both wheat and rice seeds. The underlying mechanism of this efficient delivery is that HARGO can physically absorb plasmid DNA and transport the adsorbed plasmid DNA into plant cells and deeper tissues through passive transport, eliminating the need for chemical modification of polyethylene glycol (PEG) and polyethyleneimine (PEI). These findings offer a dependable non-integrating plasmid DNA delivery tool for plant genetic engineering, which will significantly impact the advancement of plant biotechnology.

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Stepwise rapid electrolytic synthesis of graphene oxide for efficient adsorption of organic pollutants

Abstract: Graphene oxide (GO) has been widely used in energy devices, biomedicine, environmental protection, composite materials with global production capacity of million tons per year. Hummers method is currently one of...

Cited by 3 publications

References 52 publications

Graphene Oxide Covered WO₃ Nanosheet Arrays as Photoelectrode for Photoelectrochemical Detection of Trace H₂O₂

Graphene Oxide Covered WO₃ Nanosheet Arrays as Photoelectrode for Photoelectrochemical Detection of Trace H₂O₂

Electrochemical Exfoliation of Graphene Oxide: Unveiling Structural Properties and Electrochemical Performance

High aspect ratio graphene oxide: a highly efficient plasmid DNA deliverer for plant seed

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Stepwise rapid electrolytic synthesis of graphene oxide for efficient adsorption of organic pollutants

Abstract: Graphene oxide (GO) has been widely used in energy devices, biomedicine, environmental protection, composite materials with global production capacity of million tons per year. Hummers method is currently one of...

Cited by 3 publications

References 52 publications

Graphene Oxide Covered WO3 Nanosheet Arrays as Photoelectrode for Photoelectrochemical Detection of Trace H2O2

Graphene Oxide Covered WO3 Nanosheet Arrays as Photoelectrode for Photoelectrochemical Detection of Trace H2O2

Electrochemical Exfoliation of Graphene Oxide: Unveiling Structural Properties and Electrochemical Performance

High aspect ratio graphene oxide: a highly efficient plasmid DNA deliverer for plant seed

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Product

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Graphene Oxide Covered WO₃ Nanosheet Arrays as Photoelectrode for Photoelectrochemical Detection of Trace H₂O₂

Graphene Oxide Covered WO₃ Nanosheet Arrays as Photoelectrode for Photoelectrochemical Detection of Trace H₂O₂