A simple way to produce an efficient metal-free oxygen reduction electrocatalyst from graphene by generating nanopores in the matrix and subsequently establishing nitrogen-doped active sites along pore openings is demonstrated. Well-structured nanoporous (pGr) photoluminescent quantum dots (GQDs) could be simultaneously generated a chemically assisted oxidative treatment of graphene. The process helped knock out small pieces Gr through epoxide formation, which resulted generation GQD pGr...

Abstract Transition‐metal dichalcogenide quantum dots (TMDQDs) with few layers are in the forefront of recent research on tailored 2D layered materials owing to their unique band structure. Such (QDs) draw wide interest as potential candidates for components optoelectronic devices. Although a attempts towards single step synthesis MoS 2 QDs have been demonstrated, limited methods available WS QDs. Herein, we demonstrate one‐step electrochemical luminescent from bulk material. This is...

A single-step electrochemical disintegration of bulk WS₂ led to a highly active QDs electrocatalyst for HER.

A one-step electrochemical preparation of nitrogen doped, blue luminescent phosphorene quantum dots from black phosphorus using a nitrogen-laden solvent and supporting electrolyte.

Tungsten disulfide quantum dots (WS2 QDs) embedded lab on genochip based analytical device (PAD) was developed for the specific DNA detection of Meningitis, a life threatening disease. This paper-based designed by grafting two electrodes onto surface paper using conductive ink. The WS2 QDs were characterized X-ray diffraction technique, scanning electron microscopy (SEM) and transmission (TEM). Following this, oligonucleotide sequence (capture probe) immobilized over QDs/PAD electrode....

Cathodic electrochemical intercalation/exfoliation of transition metal dichalcogenides (TMDs) with bulky tetraalkylammonium-based cations is gaining popularity as it avoids the semiconducting (2H) to metallic (1T) phase transformation in TMDs like molybdenum disulfide (MoS

In this work, tungsten disulfide (WS2) nanosheets were obtained from bulk WS2 by electrochemical exfoliation and employed for the development of novel, sensitive selective sensor determination chlorpromazine (CPZ). It is worth mentioning that first time a glassy carbon (GC) electrode modified with sheets quantitative voltammetric CPZ in human urine samples. A pair well-defined reversible redox peaks (560 500 mV) observed at GC due to high surface area excellent electrocatalytic activity...

We report the simple synthesis of bismuthene nanosheets (BiNS) by ionic liquid assisted grinding exfoliation, followed size selection sequential centrifugation steps for first time. The exfoliation process results in formation self-assembled spherule-like superstructures with abundant edge sites, which are able to catalyze oxygen reduction reaction (ORR) via a two-electron pathway, higher efficiency than bulk Bismuth. rationalize enhanced ORR activity BiNS to: (i) presence 1 dimensional...

Fuel cells and metal–air batteries hold significant promise to help decarbonize transportation the electricity grid. To encourage widespread adoption of these technologies, improvements their air-breathing cathodes are required, which address problems such as high cost platinum (Pt) catalysts used boost kinetics oxygen reduction reaction (ORR) well stability Pt/C interfaces over long-term cycling. In this paper, we demonstrate a facile approach reduce Pt content less than 2 wt % by...

The possibility of interacting with individual atoms in an atomically layered 2- dimensional (2D) material brings ideal platform for highly sensitive and selective electrochemical biosensing. discovery graphene opened new avenues biosensor development, it also brought forward the possibilities other materials based on sensing platforms. Other 2D atomic layers include various functional derivatives (graphene nanoribbons, quantum dots, oxide (GO), reduced GO, doped etc.), metal chalcogenides...

Pristine ZnO based hydrogen sensors pose low sensitivity (~ 43%) at the operating temperature of 150°. Herein, we explore decoration Phosphorene oxide quantum dots (POQDs) on RF sputtered grown nanostructures for gas sensing application. A simplistic approach such as drop cast method is employed to decorate electrosynthesized POQDs (2-8 <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">μ</i> L) onto interdigitated electrodes over nanostructures. The...

Luminescent phosphorene quantum dots (PQDs) have emerged as fascinating nanomaterials for potential applications in optoelectronics, catalysis, and sensing. Herein, we investigate the structural distortion of black phosphorus (BP) under an applied electric field to yield blue luminescent PQDs [average diameter 8 ± 1.5 nm (N = 60)]. The electrosynthesized exhibit photoluminescence emission independent excitation wavelength with 84% efficiency. Structural that occurred during transformation BP...

Polarity-dependent electrocapillary imbibition in hydrophobic nanoporous carbon scaffolds.

Electrolyte mediated assembly of graphene based supercapacitor using adsorbed IL/non ionic surfactant.

Abstract We present a comparative analysis of the structural and optical properties electrosynthesized PQDs, new class size-tunable luminescent materials their nitrogen doped counter parts(NPQDs). Nitrogen doping onto phopshorene lattice could be realized i n situ at room temperature using either containing electrolyte and/or supporting in solution. An increased quantum efficiency as well redox behavior has been observed for PQDs upon critical effect on structural, electrochemical suggests...

High surface area carbon powders are used in many electrochemical applications, e.g., fuel cells, supercapacitors, and batteries. However, despite their advantages, they susceptible to oxidation corrosion when exposed oxidizing potentials. Our goal has been use diazonium chemistry attach groups block corrosion-susceptible sites alter wettability. In prior work, mesoporous colloid imprinted carbons (CICs) with pores of 12–50 nm still smaller pore necks hindered access the precursors limit...

In this work, we report the adsorption kinetics of electrochemically synthesized WS2 quantum dots (QDs) (ca. 3 nm) onto a polycrystalline gold electrode. The Langmuir isotherm approach was employed to explore temperature and adsorbate concentration dependence experimentally calculated equilibrium constant (Keq) free energy for (ΔGads). Subsequently, extract other thermodynamic parameters, such as rate (Kads), desorption (Kd), enthalpy (ΔHads), entropy (ΔSads). Our findings indicate that...

Carbon is an essential component of catalyst layers in Proton Exchange Membrane Fuel Cells (PEMFCs), especially cathodes, serving as a support material to disperse electrocatalysts. However, one the challenges use carbon electrochemical applications its propensity towards corrosion due oxidation at positive potentials, crucial factor limiting device lifetime and thus large-scale commercialization. While most prior studies have focussed on microporous powders, such black (e.g., Vulcan powder...

The need for clean energy solutions in order to significantly lower our carbon footprint is placing increasing attention on renewable energy, such as wind and solar. However, these technologies suffer from intermittency issues, thus making efficient storage conversion a major requirement. One of the this problem electrochemical CO 2 reduction (CO RR), using produce green fuels chemicals. thermodynamically kinetically unfavorable. To overcome this, development highly selective...