Seoul National University · Engineering
Professor Wang Zhang's research lab specializes in the design and synthesis of advanced functional nanomaterials for energy conversion and storage, with a strong focus on sustainable and green fabrication methods. Key research directions include the development of graphene-based composites, metal-organic frameworks, and covalent organic frameworks for applications in supercapacitors, lithium-sulfur batteries, and hydrogen storage. The lab also investigates supramolecular systems for enhancing the stability and performance of fullerenes and other nanocarbons in aqueous environments, leveraging host-guest chemistry and microenvironment engineering to improve electrochemical and photophysical properties.
Figures are computed from collected data and may differ slightly.
In this work, we reported a facile approach to prepare a uniform copper ferrite nanoparticle-attached graphene nanosheet (CuFe2O4-GN). A one-step solvothermal method featuring the reduction of graphene oxide and formation of CuFe2O4 nanoparticles was efficient, scalable, green, and controllable. The composite nanosheet was fully characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS), which demonstrated that CuFe2O4 nanoparticl
Due to various compositions and morphologies, exquisite intrinsic architectures, and renewability, biomass has been used to generate carbon electrodes for supercapacitors.
A covalent triazine-based framework (CTF) was synthesized by using a novel microwave (MW)-enhanced high-temperature ionothermal polymerization method. Amorphous CTF samples with high surface areas (up to 2390 m2 g−1) and high hydrogen adsorption capacities (up to 1.78 wt% at 1 bar and 77 K) could be easily obtained in tens of minutes by using such a MW-enhanced ionothermal method.
Obstructive sleep apnea syndrome (OSAS), a chronic condition characterized by collapse of the pharynx during sleep, has been increasingly recognized as a health issue of growing importance over the last decade. Recently emerging evidence suggests that there is a causal link between OSAS and hypertension, and hypertension represents an independent risk factor in OSAS patients. However, the pathophysiological basis for patients with OSAS having an increased risk for hypertension remains to be eluc
During the reaction process in lithium-sulfur batteries, Lewis acidic lithium polysulfides (LiPSs) affect ion distribution and overall electrolyte stability, degrading battery performance and product distribution (e.g., Li<sub>2</sub>S). Here, a microenvironment regulation strategy with optimized interface electronics and selective supramolecular channels, is proposed to enhance LiPS reaction kinetics through Lewis basic γ-cyclodextrin metal-organic framework (γ-CDMOF). To validate this concept,
A stable aqueous inclusion complex of fullerene (C60) with macromolecules (C60 concentration as high as 3 × 10<sup>-4</sup> mol L<sup>-1</sup>) was achieved by a one-step strategy using γ-cyclodextrin polymer (γ-CDP). The inclusion complex of C60 with γ-CDP (C60-γ-CDP) was characterized by ultraviolet-visible, Raman and <sup>1</sup>H-NMR spectroscopies, powder X-ray diffraction analysis, and thermogravimetric analysis. The supramolecular interactions and the equilibrium constant for a 1 : 2 (C60
Two-electron oxygen reduction reaction (ORR) catalysts are essential for the electrosynthesis of hydrogen peroxide (H2O2). MXenes, a rising family of two-dimensional (2D) transition metal carbides, have been extensively studied for energy storage and (photo)electrocatalysis due to their rich chemical compositions and tunable electronic structures. In this work, three representative MXenes of Ti3C2Tx, V2CTx, and Nb2CTx were selected for H2O2 electrosynthesis and we found that MXenes are inherent
Abstract 3D hybrids of interconnected porous carbon (PC) nanosheets/vertically aligned polyaniline (Pani) nanowires are prepared by a cost‐effective facile approach and used as high‐performance supercapacitor electrodes. The 3D PC/Pani hybrids are obtained by a simple in situ growth of Pani on 3D PC with a high specific surface area and good electrochemical performance fabricated via a one‐step thermal pyrolysis of potassium citrate. The 3D PC/Pani hybrids show an excellent specific capacitance
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