A Facile Synthesis of MoS2/g-C3N4 Composite as an Anode Material with Improved Lithium Storage Capacity

Huu, Ha Tran; Thi, Xuan Dieu Nguyen; Van, Kim Nguyen; Kim, Sung Jin; Vo, Vien

doi:10.3390/ma12111730

Cited by 35 publications

(6 citation statements)

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“…3 c showed the deconvoluted Mo 3 d spectra of composites containing four peaks. The two high intensity peaks located in the middle region could be ascribed to the Mo 3 d 3/2 (~ 231.90 eV) and Mo 3 d 5/2 (~ 228.80 eV) corresponding to main oxidation state of Mo 4+ 16 , 49 . The low and broaden peak located at around 234.70 eV corresponding to the residual Mo 6+ which is not reduced but its contribution decrease following the increase of temperature determining that higher treatment temperature is more favorable for complete growth of MoS 2 .…”

Section: Resultsmentioning

confidence: 98%

“…This is also ascribed to the decomposition of g-C 3 N 4 in the composites which happens at higher temperature (> 500 °C) in case of pure g-C 3 N 4 26 . The reduction of decomposition temperature of g-C 3 N 4 component in composites indicates the crystallization disturbance of MoS 2 towards interlayer stacking motifs of g-C 3 N 4 or the catalyzing effect of MoS 2 over thermal decomposition of g-C 3 N 4 16 , 25 , 40 . Assuming that the final product after 600 °C is pure MoO 3 , MoS 2 contents in the samples can be estimated to be 50.7, 55.8, 68.4 and 70.0% for MCN-450, MCN-500, MCN-550, MCN-600, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Molybdenum disulfide (MoS 2 ), a typical 2D layered material, has been widely investigated in potential applications such as lithium ion batteries, electronics, optoelectronics, supercapacitors and sensors 16 – 18 . Moreover, with a unique electron structure and band gap of 1.3 eV, it has also attracted as a co-photocatalyst in the water splitting 19 , and the degradation of organic pollutants in aqueous solution 20 – 22 .…”

Section: Introductionmentioning

confidence: 99%

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One-pot synthesis of S-scheme MoS2/g-C3N4 heterojunction as effective visible light photocatalyst

Huu

Thi

Nguyen

et al. 2021

Sci Rep

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Despite pioneering as the holy grail in photocatalysts, abundant reports have demonstrated that g-C3N4 performs poor photocatalytic activity due to its high recombination rate of photo-induced charge carriers. Many efforts have been conducted to overcome this limitation in which the semiconductor–semiconductor coupling strategies toward heterojunction formation were considered as the easiest but the most effective method. Herein, a one-pot solid-state reaction of thiourea and sodium molybdate as precursors at different temperatures under N2 gas was applied for preparing composites of MoS2/g-C3N4. The physicochemical characterization of the final products determines the variation in contents of components (MoS2 and g-C3N4) via the increase of synthesis temperature. The enhanced photocatalytic activity of the MoS2/g-C3N4 composites was evaluated by the degradation of Rhodamine B in an aqueous solution under visible light. Therein, composites synthesized at 500 °C showed the best photocatalytic performance with a degradation efficiency of 90%, much higher than that of single g-C3N4. The significant improvement in photocatalytic performance is attributed to the enhancement in light-harvesting and extension in photo-induced charge carriers’ lifetime of composites which are originated from the synergic effect between the components. Besides, the photocatalytic mechanism is demonstrated to well-fit into the S-scheme pathway with apparent evidences.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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One-pot synthesis of S-scheme MoS2/g-C3N4 heterojunction as effective visible light photocatalyst

Huu

Thi

Nguyen

et al. 2021

Sci Rep

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“…As previously mentioned, the FMO-600 electrode has a higher reversible capacity, which can be explained by providing additional adsorption sites for Li + storage through capacitive performance. The electrode can store Li + through pseudocapacitance and diffusion control effects. , Pseudocapacitance occurs during the charge transfer process at the electrode/electrolyte interface, which has three Faraday mechanisms based on under potential deposition, redox pseudocapacitance, and embedded pseudocapacitance. The diffusion control effect occurs during the redox process, where the kinetics are mainly limited by the slow rate of the solid phase transformation.…”

Section: Resultsmentioning

confidence: 99%

Synergistic Regulation of Built-In Electric Field and Interface Effect to Enhance the Reaction Kinetics and Stability of Lithium-Ion Batteries

Chen,

Wu,

Zhang

et al. 2024

ACS Sustainable Chem. Eng.

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The synergistic regulation of the built-in electric field and interface effect is applied in this work to solve problems of poor rate performance and short cycle life caused by low reaction kinetics and lattice expansion. Constructing heterostructures is considered an effective way to change the electric field distribution and generate rich interfaces. Fe 2 O 3 /MoO 2 /Fe 2 (MoO 4 ) 3 anode materials with heterostructures have been successfully synthesized by electrospinning combined with subsequent heat treatment. The sample obtained at 600 °C (FMO-600) exhibits excellent cyclic stability and rate performance. The capacity retention rate of the FMO-600 electrode is as high as 79.75% (986.6 mAh•g −1 after 450 cycles at 1 A•g −1 ), and the average specific capacity barely drops by 0.045% per cycle. It is important to note that even at a high current density of 5 A•g −1 , the FMO-600 electrode still exhibits an impressive specific capacity (615.6 mAh•g −1 ). Density functional theory (DFT) computations theoretically prove the formation of built-in electric fields. The higher Li + diffusion coefficient and lower electron transfer resistance of the FMO-600 electrode enhance the reaction kinetics during discharge/charge processes, while the interface effect contributes to outstanding cycling stability. This work sheds light on the rational design of high energy/power density lithium-ion battery anode materials.

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“…2D materials have the potential for next-generation applications in energy storage, ultrafast electronics, sensing, and others [15,16]. One of the emerging applications of 2D materials lies in the biomedical field, from drug delivery to analyte detection [17,18].…”

Section: Introductionmentioning

confidence: 99%

Two-Dimensional Transition Metal Dichalcogenide Based Biosensors: From Fundamentals to Healthcare Applications

2023

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There has been an exponential surge in reports on two-dimensional (2D) materials ever since the discovery of graphene in 2004. Transition metal dichalcogenides (TMDs) are a class of 2D materials where weak van der Waals force binds individual covalently bonded X–M–X layers (where M is the transition metal and X is the chalcogen), making layer-controlled synthesis possible. These individual building blocks (single-layer TMDs) transition from indirect to direct band gaps and have fascinating optical and electronic properties. Layer-dependent opto-electrical properties, along with the existence of finite band gaps, make single-layer TMDs superior to the well-known graphene that paves the way for their applications in many areas. Ultra-fast response, high on/off ratio, planar structure, low operational voltage, wafer scale synthesis capabilities, high surface-to-volume ratio, and compatibility with standard fabrication processes makes TMDs ideal candidates to replace conventional semiconductors, such as silicon, etc., in the new-age electrical, electronic, and opto-electronic devices. Besides, TMDs can be potentially utilized in single molecular sensing for early detection of different biomarkers, gas sensors, photodetector, and catalytic applications. The impact of COVID-19 has given rise to an upsurge in demand for biosensors with real-time detection capabilities. TMDs as active or supporting biosensing elements exhibit potential for real-time detection of single biomarkers and, hence, show promise in the development of point-of-care healthcare devices. In this review, we provide a historical survey of 2D TMD-based biosensors for the detection of bio analytes ranging from bacteria, viruses, and whole cells to molecular biomarkers via optical, electronic, and electrochemical sensing mechanisms. Current approaches and the latest developments in the study of healthcare devices using 2D TMDs are discussed. Additionally, this review presents an overview of the challenges in the area and discusses the future perspective of 2D TMDs in the field of biosensing for healthcare devices.

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A Facile Synthesis of MoS2/g-C3N4 Composite as an Anode Material with Improved Lithium Storage Capacity

Cited by 35 publications

References 68 publications

One-pot synthesis of S-scheme MoS2/g-C3N4 heterojunction as effective visible light photocatalyst

One-pot synthesis of S-scheme MoS2/g-C3N4 heterojunction as effective visible light photocatalyst

Synergistic Regulation of Built-In Electric Field and Interface Effect to Enhance the Reaction Kinetics and Stability of Lithium-Ion Batteries

Two-Dimensional Transition Metal Dichalcogenide Based Biosensors: From Fundamentals to Healthcare Applications

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