A5037285665- Supercapacitor Materials and Fabrication
- Advanced battery technologies research
- Electrocatalysts for Energy Conversion
- Advancements in Battery Materials
- Advanced Photocatalysis Techniques
- Graphene and Nanomaterials Applications
- Fuel Cells and Related Materials
- Conducting polymers and applications
- MXene and MAX Phase Materials
- Copper-based nanomaterials and applications
- Catalytic Processes in Materials Science
- Advanced Battery Technologies Research
- Carbon and Quantum Dots Applications
- Advanced Nanomaterials in Catalysis
- Electrospun Nanofibers in Biomedical Applications
- Solar-Powered Water Purification Methods
- Pigment Synthesis and Properties
- Electrochemical sensors and biosensors
- Advanced Polymer Synthesis and Characterization
- Luminescence and Fluorescent Materials
- Metal-Organic Frameworks: Synthesis and Applications
- Electrohydrodynamics and Fluid Dynamics
- Gas Sensing Nanomaterials and Sensors
- Advanced Sensor and Energy Harvesting Materials
- Quantum Dots Synthesis And Properties
Yonsei University
2021-2024
Indian Association for the Cultivation of Science
2015-2020
In aqueous dispersions of graphene quantum dots (GQDs), aniline is <italic>in situ</italic> polymerized to produce polyaniline-GQDs hybrids and dye-sensitized solar cells fabricated with the indicate highest power conversion efficiency 3.12%.
Abstract Tungsten oxide (WO 3 ) is an emerging 2D nanomaterial possessing unique physicochemical properties extending a wide spectrum of novel applications which are limited due to lack efficient synthesis high‐quality WO . Here, facile new synthetic method forming from tungsten sulfide, WS 2 reported. Spectroscopic, microscopic, and X‐ray studies indicate formation flower like aggregated nanosized plates highly crystalline cubic phase via intermediate orthorhombic tungstite, 3. H O phase....
The designed electrochemically modified graphite paper (ECM-GP) having a foam-like structure serves as an advanced electrode substrate of supercapacitors.
Controlled grafting of polyaniline from the surface carbon nano dots using ‘grafting from’ strategy is reported. The structured coated produced show excellent electrochemical performance.
Nanostructured hybrid conductive polyaniline (PANI) hydrogels are usually applied for supple energy storage devices owing to their flexible durability, fast-rate electrochemical activity, and good electrical conductivity. Here we prepare a solid-state supercapacitor (SC) by using N,N′-dibenzoyl-l-cystine (D)/MoS2 quantum dot (QD)/PANI (DMP) hydrogel via in situ polymerization of aniline monomer with the gelator D MoS2 QDs. TEM images show QDs embedded into three-dimensional (3D) fibrous...
Large-scale development of low-cost, efficient, and stable powder electrocatalysts for the hydrogen evolution reaction (HER) in alkaline solutions is a key step toward commercial production. Herein, hierarchical NiMo-MoO3-x hollow nanotube (NiMo-MoO3-x-HNT) with bifunctional groups as an efficient HER electrocatalyst was strategically invented using MoO3 nanorod (MoO3−NR) precursor. The synthesis mechanism NiMo-MoO3-x-HNT established based on in-depth investigations diffraction, spectral,...
The versatile technological applications of molybdenum oxides requires the efficient synthesis various stoichiometric oxides. Thus, herein, a controlled method to synthesize both MoO3 and MoO2 from MoS2 via quantum dot intermediates is reported. Microscopic, spectroscopic, X-ray studies corroborate formation orthorhombic α-MoO3 with microbelt structure monoclinic nanoparticles that self-assemble into hollow tubes. Quantitative investigations charge-storage kinetics reveal exhibits an...
A Zn(II) based two-dimensional metal–organic framework (2D MOF) [Zn2(suc)2(4-nvp)2] (1) [H2suc = succinic acid and 4-nvp 4-(1-naphthylvinyl)pyridine] exhibits a "photosalient effect" under UV light as well sunlight along with the release of stereoselective cyclobutane ligand, 1,3-bis(4′-pyridyl)-2,4-bis(naphthyl)cyclobutane (rctt-4-pncb). Photolysis in situ generated MOF solution also leads to formation rctt-4-pncb crystals. Interestingly, compound 1 shows high selectivity for Pd(II) sensing...
In this study, a cost-effective method for preparing V3.5+ electrolyte vanadium redox flow battery (VRFB) was developed using the cheapest precursor, V2O5, through catalytic reduction method. It is revealed that VRFBs do not operate properly with prepared by V2O5 salts because of significant H+ ion consumption during reaction, contributing to decrease in solution's viscosity. As result, more ions could permeate membrane, increasing imbalance between negative and positive electrolytes. To...
We have tuned reduction of graphene oxide (GO) using KI in water (KG) and acidic medium different strengths for better supercapacitor photocurrent performance. FTIR, Raman, WAXS XPS results indicate that acts as mild reducing agent, than thermal but weaker from medium. KG exhibits dc-conductivity 0.18 mS/cm specific capacitance 414 F g−1 at current density 0.5 A g−1. It long cyclic stability (∼ 95% after 10,000 cycles), excellent rate capability (56.5% retention a 20 g−1) high energy 10.76 W...
ABSTRACT In order to study the self‐assembly of block copolymer grafted from graphene oxide (GO) by fluorescence GO, poly(ε‐caprolactone) (PCL)‐block‐poly(dimethyl aminoethyl methacrylate) (PDMAEMA) is its surface using consecutive ring opening (ROP) and atom transfer radical polymerization (ATRP). GO‐g‐(PCL 13 ‐b‐PDMAEMA 117 ) (GPCLD) at pH 9.2 exhibits cloud point ( T c 32 °C. At HRTEM images indicate schizophrenic morphology vesicle 26 °C annular 30 followed giant size aggregation 38 But...
Abstract We have synthesized hydrogen tungsten oxide decorated reduced graphene (H x WO 3 @rGO) composite with different precursor weight ratios of WS 2 and GO, which the WG1‐2 system, produced from GO in 1 : ratio by treatment peroxide followed hydrothermal treatment, shows high areal capacitance 409 mF cm −2 at mA current density retention 61.4 % 20 density. This H @rGO is drop‐cast onto graphite layer‐coated on scotch tape to design a flexible supercapacitor. The solid‐state symmetric...