scholarly journals A General Method for the Synthesis of Hybrid Nanostructures Using MoSe2 Nanosheet-Assembled Nanospheres as Templates

Research ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Shikui Han ◽  
Kai Zhou ◽  
Yifu Yu ◽  
Chaoliang Tan ◽  
Junze Chen ◽  
...  
Keyword(s):  
Transition Metal ◽  
Synergistic Effects ◽  
Low Cost ◽  
Transition Metal Dichalcogenides ◽  
Synthesis Method ◽  
Hybrid Nanostructures ◽  
Colloidal Synthesis ◽  
Earth Abundant ◽  
Transition Metal Phosphides ◽  
General Method

The layered transition metal dichalcogenides (TMDs) and transition metal phosphides are low-cost, earth-abundant, and robust electrocatalysts for hydrogen evolution reaction (HER). Integrating them into hybrid nanostructures is potentially promising to further boost the catalytic activity toward HER based on their synergistic effects. Herein, we report a general method for the synthesis of a series of MoSe2-based hybrid nanostructures, including MoSe2-Ni2P, MoSe2-Co2P, MoSe2-Ni, MoSe2-Co, and MoSe2-NiS, by postgrowth of Ni2P, Co2P, Ni, Co, and NiS nanostructures on the presynthesized MoSe2 nanosheet-assembled nanospheres, respectively, via a colloidal synthesis method. As a proof-of-concept application, the as-synthesized hybrid nanostructures are used as electrocatalysts for HER, exhibiting high activity and stability in acidic media. Among them, the MoSe2-Co2P composite shows the highest HER activity with an overpotential of 167 mV at 10 mA cm-2.

scholarly journals Interface Engineering for Perovskite Solar Cells Based on 2D-Materials: A Physics Point of View

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5843
Author(s):  
Rosaria Verduci ◽  
Antonio Agresti ◽  
Valentino Romano ◽  
Giovanna D’Angelo
Keyword(s):  
Solar Cells ◽  
Transition Metal ◽  
2D Materials ◽  
Low Cost ◽  
Transition Metal Dichalcogenides ◽  
Perovskite Solar Cells ◽  
Precursor Solution ◽  
Point Of View ◽  
Physical Mechanisms ◽  
Metal Dichalcogenides

The last decade has witnessed the advance of metal halide perovskites as a promising low-cost and efficient class of light harvesters used in solar cells (SCs). Remarkably, the efficiency of lab-scale perovskite solar cells (PSCs) reached a power conversion efficiency of 25.5% in just ~10 years of research, rivalling the current record of 26.1% for Si-based PVs. To further boost the performances of PSCs, the use of 2D materials (such as graphene, transition metal dichalcogenides and transition metal carbides, nitrides and carbonitrides) has been proposed, thanks to their remarkable optoelectronic properties (that can be tuned with proper chemical composition engineering) and chemical stability. In particular, 2D materials have been demonstrated as promising candidates for (i) accelerating hot carrier transfer across the interfaces between the perovskite and the charge extraction layers; (ii) improving the crystallization of the perovskite layers (when used as additives in the precursor solution); (iii) favoring electronic bands alignment through tuning of the work function. In this mini-review, we discuss the physical mechanisms underlying the increased efficiency of 2D material-based PSCs, focusing on the three aforementioned effects.

Facile and scalable synthesis of low-cost FeS@C as long-cycle anodes for sodium-ion batteries

2019 ◽  
Vol 7 (34) ◽  
pp. 19709-19718 ◽  
Author(s):  
Dan Yang ◽  
Weihua Chen ◽  
Xixue Zhang ◽  
Liwei Mi ◽  
Chuntai Liu ◽  
...  
Keyword(s):  
Low Cost ◽  
Synthesis Method ◽  
Sodium Ion ◽  
Simple Synthesis ◽  
Sodium Ion Batteries ◽  
Cycle Stability ◽  
Long Cycle ◽  
Earth Abundant ◽  
Scalable Synthesis

Sodium ion batteries attract extensive attention owning to their earth-abundant elements and potential of low cost. Low-cost FeS@C as anode was prepared from the practical perspective including the simple synthesis method and sufficient cycle stability (97.6%, 3000 cycles).

scholarly journals Laser printed two-dimensional transition metal dichalcogenides

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Omar Adnan Abbas ◽  
Adam Henry Lewis ◽  
Nikolaos Aspiotis ◽  
Chung-Che Huang ◽  
Ioannis Zeimpekis ◽  
...  
Keyword(s):  
Transition Metal ◽  
Low Cost ◽  
Transition Metal Dichalcogenides ◽  
Light Modulation ◽  
Ambient Conditions ◽  
Large Area ◽  
Laser Printing ◽  
Metal Dichalcogenides ◽  
Versatile Technique ◽  
Post Synthesis

AbstractLaser processing is a highly versatile technique for the post-synthesis treatment and modification of transition metal dichalcogenides (TMDCs). However, to date, TMDCs synthesis typically relies on large area CVD growth and lithographic post-processing for nanodevice fabrication, thus relying heavily on complex, capital intensive, vacuum-based processing environments and fabrication tools. This inflexibility necessarily restricts the development of facile, fast, very low-cost synthesis protocols. Here we show that direct, spatially selective synthesis of 2D-TMDCs devices that exhibit excellent electrical, Raman and photoluminescence properties can be realized using laser printing under ambient conditions with minimal lithographic or thermal overheads. Our simple, elegant process can be scaled via conventional laser printing approaches including spatial light modulation and digital light engines to enable mass production protocols such as roll-to-roll processing.

Transition metal silicides: fundamentals, preparation and catalytic applications

2019 ◽  
Vol 9 (18) ◽  
pp. 4785-4820 ◽  
Author(s):  
Xiao Chen ◽  
Changhai Liang
Keyword(s):  
Transition Metal ◽  
Low Cost ◽  
Industrial Process ◽  
Inorganic Materials ◽  
Catalytic Systems ◽  
Metal Silicides ◽  
Earth Abundant ◽  
Catalytic Applications

Transition metal silicides as low-cost and earth-abundant inorganic materials are becoming indispensable constituents in catalytic systems for a variety of applications and exhibit excellent properties for sustainable industrial process.

Controlled synthesis and comparison of NiCo2S4/graphene/2D TMD ternary nanocomposites for high-performance supercapacitors

2016 ◽  
Vol 52 (59) ◽  
pp. 9251-9254 ◽  
Author(s):  
Jianfeng Shen ◽  
Pei Dong ◽  
Robert Baines ◽  
Xiaowei Xu ◽  
Zhuqing Zhang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Transition Metal ◽  
High Performance ◽  
Electrode Materials ◽  
Synergistic Effects ◽  
Transition Metal Dichalcogenides ◽  
Controlled Synthesis ◽  
Metal Dichalcogenides

Novel ternary electrode materials based on graphene, NiCo2S4, and transition metal dichalcogenides were designed and fabricated with the intention of exploiting synergistic effects conducive to supercapacitive energy storage.

scholarly journals Solution-based “bottom-up” synthesis of group VI transition metal dichalcogenides and their applications

2021 ◽  
Author(s):  
Áine Coogan ◽  
Yurii K. Gun'ko
Keyword(s):  
Transition Metal ◽  
Low Cost ◽  
Transition Metal Dichalcogenides ◽  
Phase Morphology ◽  
Synthetic Methods ◽  
High Quality ◽  
Group Vi ◽  
Bottom Up ◽  
Metal Dichalcogenides

“Bottom-up’’ synthetic methods have the potential to produce high quality TMD nanostructures with controllable properties such as size, phase, morphology, and at low-cost.

scholarly journals Fast and Low-Cost Synthesis of MoS2 Nanostructures on Paper Substrates for Near-Infrared Photodetectors

2021 ◽  
Vol 11 (3) ◽  
pp. 1234
Author(s):  
Neusmar J. A. Cordeiro ◽  
Cristina Gaspar ◽  
Maria J. de Oliveira ◽  
Daniela Nunes ◽  
Pedro Barquinha ◽  
...  
Keyword(s):  
Near Infrared ◽  
Low Cost ◽  
Transition Metal Dichalcogenides ◽  
Synthesis Method ◽  
Infrared Photodetectors ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
Synthesis Time ◽  
Metal Dichalcogenides ◽  
Paper Substrates

Recent advances in the production and development of two-dimensional transition metal dichalcogenides (2D TMDs) allow applications of these materials, with a structure similar to that of graphene, in a series of devices as promising technologies for optoelectronic applications. In this work, molybdenum disulfide (MoS2) nanostructures were grown directly on paper substrates through a microwave-assisted hydrothermal synthesis. The synthesized samples were subjected to morphological, structural, and optical analysis, using techniques such as scanning electron microscopy (SEM), X-ray diffraction (XRD), and Raman. The variation of synthesis parameters, as temperature and synthesis time, allowed the manipulation of these nanostructures during the growth process, with alteration of the metallic (1T) and semiconductor (2H) phases. By using this synthesis method, two-dimensional MoS2 nanostructures were directly grown on paper substrates. The MoS2 nanostructures were used as the active layer, to produce low-cost near-infrared photodetectors. The set of results indicates that the interdigital MoS2 photodetector with the best characteristics (responsivity of 290 mA/W, detectivity of 1.8 × 109 Jones and external quantum efficiency of 37%) was obtained using photoactive MoS2 nanosheets synthesized at 200 °C for 120 min.

scholarly journals The novel plasmonics-transition metal dichalcogenides hybrid nanostructures

2019 ◽  
Vol 49 (12) ◽  
pp. 124205 ◽  
Author(s):  
Di ZHENG ◽  
HongXing XU ◽  
Yang LI ◽  
Tong FU ◽  
Wen CHEN ◽  
...  
Keyword(s):  
Transition Metal ◽  
Transition Metal Dichalcogenides ◽  
Hybrid Nanostructures ◽  
The Novel ◽  
Metal Dichalcogenides
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