A structural study of size selected WSe2 nanoflakes prepared via liquid phase exfoliation: X-ray absorption to electrochemical application

Saisopa, Thanit; Bunpheng, Aritsa; Wechprasit, Tirapat; Kidkhunthod, Pinit; Songsiriritthigul, Prayoon; Jiamprasertboon, Arreerat; Bootchanont, Atipong; Sailuam, Wutthigrai; Rattanachai, Yuttakarn; Nualchimplee, Chakrit; Hirunpinyopas, Wisit; Iamprasertkun, Pawin

doi:10.1016/j.radphyschem.2023.110788

Cited by 5 publications

(4 citation statements)

References 44 publications

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“…It is observed that the quantity of water added during exfoliation did not significantly impact the peak’s location but did affect its intensity (inset of Figure a). Furthermore, the full width at half maximum (FWHM) of each exfoliated MoS 2 was noticeably wider than that of the bulk powder, indicating lower flake dimensions were obtained . The FWHM and d -spacing values at 2θ around 14.45° of the bulk and exfoliated MoS 2 nanosheets prepared with varying amounts of water in NMP are provided in Table S1, which confirms that adding water content during exfoliation did not change the phase of MoS 2 ; rather, only the dimensions were reduced.…”

Section: Resultsmentioning

confidence: 62%

Tuning Surface Energy to Enhance MoS₂ Nanosheet Production via Liquid-Phase Exfoliation: Understanding the Electrochemical Adsorption of Cesium Chloride

Chavalekvirat,

Nakkiew,

Kunaneksin

et al. 2023

Inorg. Chem.

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Environmental pollution caused by radionuclides like Cs-137 and Cs-134 has increased global attention toward public health. Electrochemical adsorption has emerged as a feasible, rapid, and scalable method to treat contaminated water sources. However, graphene and its derivatives have limitations in ion adsorption via physisorption, forming a double layer that restricts the electrode’s adsorption capacity. To address this, we propose the use of molybdenum disulfide (MoS2) with its extensive intercalation galleries of MoS2 nanosheets for cesium removal via an electrochemical route. Liquid-phase exfoliation with water and N-methyl-2-pyrrolidone (NMP) was then used to produce MoS2 nanosheets in a scalable quantity (high-yield production). The formation of a mixed solvent possessing relatively equivalent surface energy for exfoliation enabled us to achieve a remarkable exfoliation yield of up to ca. 1.26 mg mL–1, which is one of the highest yields reported to date (without a surfactant being added) and to the best of our knowledge. The 35% v/v of water in NMP displayed a maximum yield while maintaining the structure of the as-exfoliated one. Water exceeding over 66.7% v/v led to the formation of MoO3. Moreover, an insight into the cesium ion removal mechanism through the electrochemical route was demonstrated. It is found that the Cs+ removal follows electrochemical intercalation rather than adsorption. This work aids the understanding of cesium intercalation coupled with a mass-scale production method, which should lead to more efficient and cost-effective removal of radionuclides from contaminated water sources, opening new research avenues in materials and environmental science.

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Section: Resultsmentioning

confidence: 62%

Tuning Surface Energy to Enhance MoS₂ Nanosheet Production via Liquid-Phase Exfoliation: Understanding the Electrochemical Adsorption of Cesium Chloride

Chavalekvirat,

Nakkiew,

Kunaneksin

et al. 2023

Inorg. Chem.

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“…217 Electrochemical intercalation of a variety of WSe 2 flake sizes were studied, and it is found that the smaller in flake size exhibits high pseudocapacitive properties, including surface redox and intercalation. 204 Bissett et al demonstrated that the MoS 2 /graphene composited can enhance the overall capacitance of the prepared electrodes. 218 Also, Nualchimplee et al also reported that the selection of exfoliation solvent can affect the electrochemistry of the asobtained materials, i.e., NMP/water can create an autooxidation of MoS 2 to MoO 3 , which enlarged the interlayer between adjacent sheets leading to more ion accommodation during the charging process.…”

Section: Energy Storage Applicationsmentioning

confidence: 99%

“…The existing galleries can accommodate the ions via electrochemical intercalation, boosting the capacitance (also refer to capacity in batteries) . Electrochemical intercalation of a variety of WSe 2 flake sizes were studied, and it is found that the smaller in flake size exhibits high pseudocapacitive properties, including surface redox and intercalation . Bissett et al demonstrated that the MoS 2 /graphene composited can enhance the overall capacitance of the prepared electrodes .…”

Section: Electrochemical Applications Of the As-exfoliated Materialsmentioning

confidence: 99%

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Liquid Phase Exfoliation of 2D Materials and Its Electrochemical Applications in the Data-Driven Future

Chavalekvirat,

Hirunpinyopas,

Deshsorn

et al. 2024

Precision Chemistry

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The electrochemical properties of 2D materials, particularly transition metal dichalcogenides (TMDs), hinge on their structural and chemical characteristics. To be practically viable, achieving large-scale, high-yield production is crucial, ensuring both quality and electrochemical suitability for applications in energy storage, electrocatalysis, and potentialbased ionic sieving membranes. A prerequisite for success is a deep understanding of the synthesis process, forming a critical link between materials synthesis and electrochemical performance. This review extensively examines the liquid-phase exfoliation technique, providing insights into potential advancements and strategies to optimize the TMDs nanosheet yield while preserving their electrochemical attributes. The primary goal is to compile techniques for enhancing TMDs nanosheet yield through direct liquid-phase exfoliation, considering parameters like solvents, surfactants, centrifugation, and sonication dynamics. Beyond addressing the exfoliation yield, the review emphasizes the potential impact of these parameters on the structural and chemical properties of TMD nanosheets, highlighting their pivotal role in electrochemical applications. Acknowledging evolving research methodologies, the review explores integrating machine learning and data science as tools for understanding relationships and key characteristics. Envisioned to advance 2D material research, including the optimization of graphene, MXenes, and TMDs synthesis for electrochemical applications, this compilation charts a course toward data-driven techniques. By bridging experimental and machine learning approaches, it promises to reshape the landscape of knowledge in electrochemistry, offering a transformative resource for the academic community.

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Introducing hydrophilic cellulose nanofiber as a bio-separator for “water-in-salt” based energy storage devices

Deerattrakul

Sakulaue

Bunpheng

et al. 2023

Electrochimica Acta

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A structural study of size selected WSe2 nanoflakes prepared via liquid phase exfoliation: X-ray absorption to electrochemical application

Cited by 5 publications

References 44 publications

Tuning Surface Energy to Enhance MoS₂ Nanosheet Production via Liquid-Phase Exfoliation: Understanding the Electrochemical Adsorption of Cesium Chloride

Tuning Surface Energy to Enhance MoS₂ Nanosheet Production via Liquid-Phase Exfoliation: Understanding the Electrochemical Adsorption of Cesium Chloride

Liquid Phase Exfoliation of 2D Materials and Its Electrochemical Applications in the Data-Driven Future

Introducing hydrophilic cellulose nanofiber as a bio-separator for “water-in-salt” based energy storage devices

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A structural study of size selected WSe2 nanoflakes prepared via liquid phase exfoliation: X-ray absorption to electrochemical application

Cited by 5 publications

References 44 publications

Tuning Surface Energy to Enhance MoS2 Nanosheet Production via Liquid-Phase Exfoliation: Understanding the Electrochemical Adsorption of Cesium Chloride

Tuning Surface Energy to Enhance MoS2 Nanosheet Production via Liquid-Phase Exfoliation: Understanding the Electrochemical Adsorption of Cesium Chloride

Liquid Phase Exfoliation of 2D Materials and Its Electrochemical Applications in the Data-Driven Future

Introducing hydrophilic cellulose nanofiber as a bio-separator for “water-in-salt” based energy storage devices

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Product

Resources

About

Tuning Surface Energy to Enhance MoS₂ Nanosheet Production via Liquid-Phase Exfoliation: Understanding the Electrochemical Adsorption of Cesium Chloride

Tuning Surface Energy to Enhance MoS₂ Nanosheet Production via Liquid-Phase Exfoliation: Understanding the Electrochemical Adsorption of Cesium Chloride