Evaluation of different carbon materials in adsorption and solid-phase microextraction of 2,4,6-trichlorophenol from water

Kuśmierek, Krzysztof; Borucka, Monika; Świątkowski, Andrzej; Dąbek, Lidia

doi:10.5004/dwt.2019.24124

Cited by 3 publications

(2 citation statements)

References 40 publications

(39 reference statements)

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“…where h is the equilibrium relative pressure, a is the adsorption (mmol/g), c is the equation constant, and a0 is the number of primary adsorption centers (mmol/g). A detailed procedure is described in Kuśmierek et al (2019). The a0 values allow the characterization of the degree of polarity of the adsorbent surface to estimate its hydrophilic or hydrophobic character.…”

Section: Nutshells Characterizationmentioning

confidence: 99%

Nutshells as modifiers of carbon paste electrodes used in detecting chloroorganic water pollutants

Skrzypczyńska

Kuśmierek

Świątkowski

et al. 2019

BioRes

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Electrochemical properties of a carbon paste electrode (graphite) modified with hazelnut and walnut shells were investigated. The adsorption of 4-chlorophenol (4-CP) on the studied materials was determined, and the hazelnut shells were found to provide a higher adsorption capacity. The hazelnut and walnut shells were used to modify the carbon paste electrode to detect 4-CP by cyclic voltammetry. Compared to an unmodified electrode, all of the new paste electrodes showed much higher sensitivity in the 4-CP detection.

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Section: Nutshells Characterizationmentioning

confidence: 99%

Nutshells as modifiers of carbon paste electrodes used in detecting chloroorganic water pollutants

Skrzypczyńska

Kuśmierek

Świątkowski

et al. 2019

BioRes

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“…Among the developed materials, activated carbon presented unique advantages as a SPME coating for efficiently capturing organic compounds from environmental samples, owing to its high surface area, hydrophobic interaction, low cost, and ease to obtain from agricultural waste [33][34][35][36]. For instance, Ji et al [37] fabricated a type of nitrogen-doped porous carbon derived from marine algae with a large specific surface area and wide pore size distribution, and used it as an SPME coating for the determination of chlorobenzenes from water.…”

Section: Introductionmentioning

confidence: 99%

Polyacrylic Acid Functionalized Biomass-Derived Carbon Skeleton with Highly Porous Hierarchical Structures for Efficient Solid-Phase Microextraction of Volatile Halogenated Hydrocarbons

Long

Liu

et al. 2022

Nanomaterials

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In this study, polyacrylic acid functionalized N-doped porous carbon derived from shaddock peels (PAA/N-SPCs) was fabricated and used as a solid-phase microextraction (SPME) coating for capturing and determining volatile halogenated hydrocarbons (VHCs) from water. Characterizations results demonstrated that the PAA/N-SPCs presented a highly meso/macro-porous hierarchical structure consisting of a carbon skeleton. The introduction of PAA promoted the formation of polar chemical groups on the carbon skeleton. Consequently, large specific surface area, highly hierarchical structures, and abundant chemical groups endowed the PAA/N-SPCs, which exhibited superior SPME capacities for VHCs in comparison to pristine N-SPCs and commercial SPME coatings. Under the optimum extraction conditions, the proposed analytical method presented wide linearity in the concentration range of 0.5–50 ng mL−1, excellent reproducibility with relative standard deviations of 5.8%–7.2%, and low limits of detection varying from 0.0005 to 0.0086 ng mL−1. Finally, the proposed method was applied to analyze VHCs from real water samples and observed satisfactory recoveries ranging from 75% to 116%. This study proposed a novel functionalized porous carbon skeleton as SPME coating for analyzing pollutants from environmental samples.

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Improving Stability of CO₂ Electroreduction by Incorporating Ag NPs in N-Doped Ordered Mesoporous Carbon Structures

Van den Hoek,

Daems,

Arnouts

et al. 2023

ACS Appl. Mater. Interfaces

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The electroreduction of carbon dioxide (eCO 2 RR) to CO using Ag nanoparticles as an electrocatalyst is promising as an industrial carbon capture and utilization (CCU) technique to mitigate CO 2 emissions. Nevertheless, the long-term stability of these Ag nanoparticles has been insufficient despite initial high Faradaic efficiencies and/or partial current densities. To improve the stability, we evaluated an up-scalable and easily tunable synthesis route to deposit low-weight percentages of Ag nanoparticles (NPs) on and into the framework of a nitrogen-doped ordered mesoporous carbon (NOMC) structure. By exploiting this so-called nanoparticle confinement strategy, the nanoparticle mobility under operation is strongly reduced. As a result, particle detachment and agglomeration, two of the most pronounced electrocatalytic degradation mechanisms, are (partially) blocked and catalyst durability is improved. Several synthesis parameters, such as the anchoring agent, the weight percentage of Ag NPs, and the type of carbonaceous support material, were modified in a controlled manner to evaluate their respective impact on the overall electrochemical performance, with a strong emphasis on operational stability. The resulting powders were evaluated through electrochemical and physicochemical characterization methods, including X-ray diffraction (XRD), N 2 -physisorption, Inductively coupled plasma mass spectrometry (ICP-MS), scanning electron microscopy (SEM), SEM-energy-dispersive X-ray spectroscopy (SEM-EDS), high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM), STEM-EDS, electron tomography, and X-ray photoelectron spectroscopy (XPS). The optimized Ag/soft-NOMC catalysts showed both a promising selectivity (∼80%) and stability compared with commercial Ag NPs while decreasing the loading of the transition metal by more than 50%. The stability of both the 5 and 10 wt % Ag/soft-NOMC catalysts showed considerable improvements by anchoring the Ag NPs on and into a NOMC framework, resulting in a 267% improvement in CO selectivity after 72 h (despite initial losses) compared to commercial Ag NPs. These results demonstrate the promising strategy of anchoring Ag NPs to improve the CO selectivity during prolonged experiments due to the reduced mobility of the Ag NPs and thus enhanced stability.

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Evaluation of different carbon materials in adsorption and solid-phase microextraction of 2,4,6-trichlorophenol from water

Cited by 3 publications

References 40 publications

Nutshells as modifiers of carbon paste electrodes used in detecting chloroorganic water pollutants

Nutshells as modifiers of carbon paste electrodes used in detecting chloroorganic water pollutants

Polyacrylic Acid Functionalized Biomass-Derived Carbon Skeleton with Highly Porous Hierarchical Structures for Efficient Solid-Phase Microextraction of Volatile Halogenated Hydrocarbons

Improving Stability of CO₂ Electroreduction by Incorporating Ag NPs in N-Doped Ordered Mesoporous Carbon Structures

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Evaluation of different carbon materials in adsorption and solid-phase microextraction of 2,4,6-trichlorophenol from water

Cited by 3 publications

References 40 publications

Nutshells as modifiers of carbon paste electrodes used in detecting chloroorganic water pollutants

Nutshells as modifiers of carbon paste electrodes used in detecting chloroorganic water pollutants

Polyacrylic Acid Functionalized Biomass-Derived Carbon Skeleton with Highly Porous Hierarchical Structures for Efficient Solid-Phase Microextraction of Volatile Halogenated Hydrocarbons

Improving Stability of CO2 Electroreduction by Incorporating Ag NPs in N-Doped Ordered Mesoporous Carbon Structures

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Improving Stability of CO₂ Electroreduction by Incorporating Ag NPs in N-Doped Ordered Mesoporous Carbon Structures