Interlayer engineering of two-dimensional transition-metal disulfides for electrochemical and optical sensing applications

Shu, Yijin; Yang, Yang; Gao, Qingsheng

doi:10.1016/j.flatc.2021.100242

Cited by 10 publications

(6 citation statements)

References 184 publications

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“…It can be observed that NiCoP and NiP are composed of nanosheets with a size of about 300~400 nm. Interestingly, two-dimensional morphology can be discovered in transition-metal compounds [ 23 ], metal oxides [ 24 ], and carbon materials [ 25 ], which provide a morphological insight that could expose more active sites to promote mass/charge transport at the electrode/electrolyte interface as well as improving electrochemical performance. From the morphology of FESEM images, it is found that the intercalated nanosheets have many pores and a large specific surface area, providing more exposed catalytic active sites.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Bimetallic Ni-Co Phosphide Nanosheets for Electrochemical Non-Enzymatic H2O2 Sensing

2022

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NiCoP nanosheets (NSs) were successfully synthesized using the hydrothermal and high-temperature phosphorization process. The obtained NiCoP NSs were immobilized on a glassy carbon electrode (GCE) and used to construct a novel sensing platform for electrochemical non-enzymatic H2O2 sensing. Physicochemical characteristics of NiCoP NSs were obtained by field-emission scanning electron microscopy (FESEM), field-emission transmission electron microscope (FETEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). In addition, the electrochemical properties of NiCoP NSs were obtained by cyclic voltammetry (CV) and chronoamperometry (CA) towards the non-enzymatic detection of H2O2. FESEM and FETEM images provided a morphological insight (the unique nanosheets morphology of NiCoP) that could expose more active sites to promote mass/charge transport at the electrode/electrolyte interface. XRD and XPS results also confirmed the crystalline nature of the NiCoP nanosheets and the coexistence of multiple transitional metal oxidation states in NiCoP nanosheets. These unique physicochemical characteristics had a degree of contribution to ensuring enhancement in the electrochemical behavior. As a result, the synthesized NiCoP NSs composed of intercalated nanosheets, as well as the synergistic interaction between bimetallic Ni/Co and P atoms exhibited excellent electrocatalytical activity towards H2O2 electroreduction at neutral medium. As the results showed, the electrochemical sensing based on NiCoP NSs displayed a linear range of 0.05~4 mM, a sensitivity of 225.7 μA mM−1 cm−2, a limit of detection (LOD) of 1.190 μM, and good selectivity. It was concluded that NiCoP NSs-based electrochemical sensing might open new opportunities for future construction of H2O2 sensing platforms.

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Section: Resultsmentioning

confidence: 99%

Synthesis of Bimetallic Ni-Co Phosphide Nanosheets for Electrochemical Non-Enzymatic H2O2 Sensing

2022

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“…As for electrochemical catalytic sensing, which is the main focus of this paper, a large number of non-enzyme nanomaterials have been reported in resent reports, which have uniform size, high catalytic capacity, or unique appearance. [4][5][6] Electrocatalytic signal amplifications based on nanomaterials have made many achievements in enhancing the sensitivity and selectivity of electrochemical sensors. [7] In fact, electrochemical sensors contain one or more electrocatalytic processes that involve efficient chemical transformations related to the interface and size effects of the electrode material, while the electrocatalytic sensing performance is mainly affected by the materials.…”

Section: Introductionmentioning

confidence: 99%

Structure Regulation of Single‐atom Catalysts for Electrocatalytic Sensing

Shu,

Mo,

Gao

2024

ChemCatChem

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Single‐atom catalysts (SACs) have received extensive attention in the fields of electrocatalytic sensing, and in response to the requirements of different sensing systems, a variety of metal single‐atom structures have been emerged. In this review, we at first introduce the current mainstream synthesis methods of SACs, and then focus on the structural regulation strategies of SACs and the structure‐performance relationship generated in electrocatalytic sensing. It is worth noting that we classify the regulation engineering of single‐atom structures and describe the corresponding enhanced performance of electrocatalytic sensing, which makes up for the shortcomings of reviews in this field. Eventually, the opportunities and challenges of SACs based electrochemical sensors are outlined.

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“…Two-dimensional (2D) van der Waals (vdW) heterostructures have been widely studied for the development of nanoelectronics. Transition-metal dichalcogenides (TMDCs) have attracted significant attention for several applications, such as memory and logic circuits [1,2], photocatalytic water splitting devices [3], field-effect transistors [4,5], tunneling transistors [6], bipolar junction transistors [7], ferroelectric field-effect transistor (FE) transistors [8,9], ferromagnetic transistors [10], and sensors [11][12][13]. Transition-metal dichalcogenides have suitable energy bandgaps for electronic and optoelectronic devices.…”

Section: Introductionmentioning

confidence: 99%

Low Power Consumption Gate-Tunable WSe2/SnSe2 van der Waals Tunnel Field-Effect Transistor

Abderrahmane

Woo

2022

Electronics

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Two-dimensional (2D) transition-metal dichalcogenides (TMDCs) have attracted attention as promising next-generation electronic devices and sensors. In this study, we fabricated a novel nanoelectronic device based on a black-phosphorus-gated WSe2/SnSe2 van der Waals (vdW) tunnel field-effect transistor (TFET), where hexagonal boron nitride (h-BN) was used as the gate insulator. We performed morphological, electrical, and optoelectronic characterizations. The p-WSe2/n-SnSe2 heterostructure-based TFET exhibited p-type behavior with a good dependence on the gate voltage. The TFET device showed a trend toward negative differential resistance (NDR) originating from band-to-band tunneling, which can be tuned by applying a gate voltage. The optoelectronic performance of the TFET device was low, with a maximum photoresponsivity of 11 mA W−1, owing to the large device length. The results obtained herein promote the integration of black phosphorus into low-energy-consumption 2D vdW TFETs.

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Interlayer engineering of two-dimensional transition-metal disulfides for electrochemical and optical sensing applications

Cited by 10 publications

References 184 publications

Synthesis of Bimetallic Ni-Co Phosphide Nanosheets for Electrochemical Non-Enzymatic H2O2 Sensing

Synthesis of Bimetallic Ni-Co Phosphide Nanosheets for Electrochemical Non-Enzymatic H2O2 Sensing

Structure Regulation of Single‐atom Catalysts for Electrocatalytic Sensing

Low Power Consumption Gate-Tunable WSe2/SnSe2 van der Waals Tunnel Field-Effect Transistor

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