Synthesis of Tungsten Disulfide and Molybdenum Disulfide Quantum Dots and Their Applications

Abstract

With fascinating optical, electronic, and mechanical properties, tungsten disulfide (WS2) and molybdenum disulfide (MoS2) quantum dots (QDs) are promising for related applications. Their bandgap energy, photoluminescence, and electrochemical properties are closely related to their size, morphology, dimensionality, crystal phase, and structure. In this Review, we introduce the crystal phases and structures of WS2 and MoS2 QDs followed by a summary of their physical and chemical synthetic methods and their applications in light-emitting devices, supercapacitors, and others. Additionally, the advantages and limitations of different synthetic strategies and challenges in these promising fields are discussed on the basis of current development.

Electronic Properties of Triangle Molybdenum Disulfide (MoS2) Clusters with Different Sizes and Edges

“…Compared with their 2D and one dimensional (1D) counterparts, zero dimensional (0D) MoS 2 clusters possess tunable energy levels, more active edges, and larger surface-area-to-volume ratios, which give them fascinating properties. This makes them promising candidates for application in fields such as optoelectronics [ 14 , 15 ], electrochemical technology [ 16 , 17 ], biology [ 18 ], catalysis [ 19 ] and so forth [ 20 , 21 , 22 ]. Jaramillo et al [ 23 ] pointed out that 2D TMDs are hydrogen evolution reaction (HER) active because of their highly active edges, which makes them potential candidates for electrocatalytic hydrogen evolution.…”

Polymer Composites with Quantum Dots as Potential Electrode Materials for Supercapacitors Application: A Review

“…With using Ni flake and graphite rod as electrodes, the as-prepared NiO quantum dots were uniformly dispersed on the surface of graphene and an enhanced electrochemical activity was achieved using the prepared composite electrode material. Preparation of WS 2 and MoS 2 via electrochemical technique is also been explored by many researchers [43]. Valappil et al prepared WS 2 QDs by synergistic effect of Lithium Perchlorate intercalation and propylene carbonate used as electrolyte [44].…”

“…So, this process have successfully shown advantages like enhanced production yield, flexible usage of electrolytes, superior stability without any additive binders during synthesis, efficient exfoliation via regulating the potential or current [43,46]. More importantly, size controllability is another crucial aspect which can be achieved with this process by altering temperature of electrolyte [40].…”

MoS2-based nanocomposites: synthesis, structure, and applications in water remediation and energy storage: a review

“…As a result, the necessity for high-power, ever-present, and high-energy-density storage has increased (Simon and Gogotsi 2020). Owing to their swift charge/discharge rate, high-power density, ultra-long cycle life, relatively low-cost, environmental, and safe operation environments, supercapacitors exhibit superiority over traditional electrostatic capacitors and batteries (Yin et al 2020). As a result, according to the Statista database, the automotive supercapacitors market worldwide is predicted to rise to 7 billion US $ by 2028, related to ~ 0.5 US $ in 2018.…”