Characteristic Evaluation of Graphene Oxide for Bisphenol A Adsorption in Aqueous Solution

Phatthanakittiphong, Thatchaphong; Seo, Gyutae

doi:10.3390/nano6070128

Cited by 64 publications

(23 citation statements)

References 53 publications

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“…During the polymerization of pyrrole to form polypyrrole (either chemically or electrochemically), positive charges are created in its structure (polarons and bipolarons) [26]. Therefore, here PPy was not only used for conductive polymers, but also used as an effective linker for help in the immobilization of RGO and nanoAu on the electrode surface due to electrostatic interactions, π-π interactions [10,26,27], which contributes mechanical stability and proper conjugation to the nanohybrid composite [28]. The resulting PPy–RGO–nanoAu is expected to exhibit excellent material properties of parent components on the electrode surface, which may improve the charge transport properties, immobilization ability, and enhance signal responses due to the synergistic effect.…”

Section: Resultsmentioning

confidence: 99%

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Electrochemical Synthesis of Polypyrrole, Reduced Graphene Oxide, and Gold Nanoparticles Composite and Its Application to Hydrogen Peroxide Biosensor

Zhao

Hou

et al. 2016

Nanomaterials

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Here we report a facile eco-friendly one-step electrochemical approach for the fabrication of a polypyrrole (PPy), reduced graphene oxide (RGO), and gold nanoparticles (nanoAu) biocomposite on a glassy carbon electrode (GCE). The electrochemical behaviors of PPy–RGO–nanoAu and its application to electrochemical detection of hydrogen peroxide were investigated by cyclic voltammetry. Graphene oxide and pyrrole monomer were first mixed and casted on the surface of a cleaned GCE. After an electrochemical processing consisting of the electrooxidation of pyrrole monomer and simultaneous electroreduction of graphene oxide and auric ions (Au3+) in aqueous solution, a PPy–RGO–nanoAu biocomposite was synthesized on GCE. Each component of PPy–RGO–nanoAu is electroactive without non-electroactive substance. The obtained PPy–RGO–nanoAu/GCE exhibited high electrocatalytic activity toward hydrogen peroxide, which allows the detection of hydrogen peroxide at a negative potential of about −0.62 V vs. SCE. The amperometric responses of the biosensor displayed a sensitivity of 40 µA/mM, a linear range of 32 µM–2 mM, and a detection limit of 2.7 µM (signal-to-noise ratio = 3) with good stability and acceptable reproducibility and selectivity. The results clearly demonstrate the potential of the as-prepared PPy–RGO–nanoAu biocomposite for use as a highly electroactive matrix for an amperometric biosensor.

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Section: Resultsmentioning

confidence: 99%

“…The acceptable stability of the biosensor could be mainly attributed to the good stability of parent components. Notably, PPy is an effective linker for help in the immobilization of RGO and nanoAu on the electrode surface [10,26,27,28]. Moreover, the RGO coating is stable as a result of its poor solubility in common solvents [38].…”

Section: Resultsmentioning

confidence: 99%

Electrochemical Synthesis of Polypyrrole, Reduced Graphene Oxide, and Gold Nanoparticles Composite and Its Application to Hydrogen Peroxide Biosensor

Zhao

Hou

et al. 2016

Nanomaterials

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“…This amphiphilic property is similar to HTC@ANS-200, which contains hydrophilic functional groups and hydrophobic basal plane. The compatibility of properties in the adsorbate and adsorbent may lead to strong adsorption [84]. Additionally, the length of BPA and diuron molecules are 0.94 nm and 0.75 nm, respectively and the average pore size of HTC@ ANS-200 is 2 nm, which shows that BPA and diuron molecules enter easily on the porous structure of HTC@ANS-200 and are adsorbed on the adsorption sites.…”

Section: Adsorption Mechanismmentioning

confidence: 99%

“…The kinetic data for the adsorption of BPA and diuron on HTC@ANS-200 were examined using the pseudo-first-order (PFO) and pseudo-second-order (PSO) equations [49]. The model constants were calculated using Eqs.…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Hydrothermal Carbonization of Argan Nut Shell: Functional Mesoporous Carbon with Excellent Performance in the Adsorption of Bisphenol A and Diuron

Zbair

Bottlinger

Ainassaari

et al. 2018

Waste Biomass Valor

101

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Hydrochar derived from Argan nut shell (ANS) was synthesized and applied to remove bisphenol A (BPA) and diuron. The results indicated that the hydrochar prepared at 200 °C (HTC@ANS-200) possessed a higher specific surface area (42 m 2 /g) than hydrochar (HTC@ANS-180) prepared at 180 °C (17 m 2 /g). The hydrochars exhibited spherical particles, which are rich in functional groups. The HTC@ANS-200 exhibited high adsorption efficiency, of about 92% of the BPA removal and 95% of diuron removal. The maximum Langmuir adsorption capacities of HTC@ANS-200 at room temperature were 1162.79 mg/for Bisphenol A and 833.33 mg/g for diuron (higher than most reported adsorbents). The adsorption process was spontaneous (− ΔG°) and exothermic (− ΔH°). Excellent reusability was reclaimed after five cycles, the removal efficiency showed a weak decrease of 4% for BPA and 1% for diuron. The analysis of Fourier transforms infrared spectrometry demonstrated that the aromatic C=C and OH played major roles in the adsorption mechanisms of BPA and diuron in this study. The high adsorption capacity was attributed to the beneficial porosity (The pore size of HTC@ANS-200 bigger than the size of BPA and diuron molecule) and surface functional groups. BPA and diuron adsorption occurred also via multiple adsorption mechanisms, including pore filling, π-π interactions, and hydrogen bonding interactions on HTC@ANS-200. Statement of NoveltyTo our knowledge, this is the first paper introduces a new technique to produce hydrochar from argan nut shell and its studies as an adsorbent for the removal of bisphenol A and diuron. This study does not only open up a novel way to recycle argan nut shell but also presents a beneficial approach to synthesize low-cost materials for wastewater treatment.

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“…Studying the varying effect of adsorbent mass on adsorption efficiency is important in the optimization of dosage required the adsorption process thereby saving operation cost (Phatthanakittiphong and Seo 2016). Figure 6 shows the effect of varying adsorbent dosage on the adsorption of the lead ions in the range of 0.01-0.05 g. This variation resulted in an increase in adsorption up till 0.04 g for lead ions.…”

Section: Effect Of Adsorbent Dosementioning

confidence: 99%

Adsorption of lead ions on magnetically separable Fe3O4 watermelon composite

2020

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The search for green methods for the synthesis of eco-friendly and sustainable materials is the focus of many studies. In this paper, magnetite nanoparticles (WM-Fe3O4) were synthesized using watermelon rind as a stabilizing agent and their adsorption capacity for the removal of lead ions was evaluated. The synthesized WM-Fe3O4 was characterized using Fourier transform infrared spectroscopy, X-ray diffraction and scanning electron microscopy. Adsorption capacity and mechanism of WM-Fe3O4 for the removal of lead ions from water were evaluated. The adsorption isotherms data were well described by both Langmuir and Freundlich isotherms showing the heterogeneous nature of the adsorbent. Adsorption kinetics followed the pseudo-second-order model which confirmed the heterogeneity of the adsorbent and shows that adsorption followed chemisorption. Adsorption capacity was found to be 138 mg/g for lead. The initial solution pH had an influence on the adsorption. The removal efficiency decreased after pH 7. Effect of varying adsorbent mass indicates that a low dosage is required thereby favouring industrial scale up. The adsorption of lead ions was mainly controlled by electrostatic attraction and polar interactions. This adsorbent has potentials for the efficient capture of heavy metals with possibilities for the future replacement of expensive adsorbents.

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Characteristic Evaluation of Graphene Oxide for Bisphenol A Adsorption in Aqueous Solution

Cited by 64 publications

References 53 publications

Electrochemical Synthesis of Polypyrrole, Reduced Graphene Oxide, and Gold Nanoparticles Composite and Its Application to Hydrogen Peroxide Biosensor

Electrochemical Synthesis of Polypyrrole, Reduced Graphene Oxide, and Gold Nanoparticles Composite and Its Application to Hydrogen Peroxide Biosensor

Hydrothermal Carbonization of Argan Nut Shell: Functional Mesoporous Carbon with Excellent Performance in the Adsorption of Bisphenol A and Diuron

Adsorption of lead ions on magnetically separable Fe3O4 watermelon composite

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