Yonsei University · Materials Science
Professor Yeojoon Yoon's research lab specializes in the development and application of advanced nanomaterials for environmental remediation, with a primary focus on sonocatalytic and sonophotocatalytic degradation of emerging pollutants such as antibiotics, pharmaceuticals, and organic dyes. The lab emphasizes the design of novel two-dimensional and nano-laminated materials—such as MAX phases, layered double hydroxides, and MoS₂-based composites—engineered for enhanced catalytic performance under ultrasound and/or visible light. Research also includes comprehensive physicochemical characterization and ecotoxicological assessment to ensure environmental safety and practical applicability.
Figures are computed from collected data and may differ slightly.
This study aims to investigate the sonocatalytic activation of hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) using Cr<sub>2</sub>AlC MAX phase prepared by the reactive sintering process. The hexagonal structure of the crystalline MAX phase was confirmed by X-ray diffraction. Moreover, the compacted layered structure of the MAX phase was observed via scanning electron microscopy and high-resolution transmission electron microscopy. Under the desired operating conditions, Cr<sub>2</sub>AlC MAX ph
Contamination of water resources by pharmaceutical residues, especially during the time of pandemics, has become a serious problem worldwide and concerns have been raised about the efficient elimination of these compounds from aquatic environments. This study has focused on the development and evaluation of the sonocatalytic activity of a flower-like MoS<sub>2</sub>/CNTs nanocomposite for the targeted degradation of hydroxychloroquine (HCQ). This nanocomposite was prepared using a facile hydroth
In light of growing environmental concerns over emerging contaminants in aquatic environments, antibiotics in particular, have prompted the development of a new generation of effective sonocatalytic systems. In this study, a new type of nano-laminated material, Ti<sub>2</sub>SnC MAX phase, is prepared, characterized, and evaluated for the sonocatalytic degradation of oxytetracycline (OTC) antibiotic. A variety of identification analyses, including X-ray diffraction, scanning electron microscopy,
Layered double hydroxides (LDH) are widely used in a variety of industries due to their unique structural characteristics. It is essential to comprehend the environmental behavior and toxicological impacts of these substances to address potential risks caused by LDH release into the environment. In this study, CuFe and Cobalt (Co)-doped CuFe LDHs were synthesized and their toxicities to Chlorella vulgaris were investigated. In the scanning electron microscope images, the Co-doped and undoped cat
Layered double hydroxides (LDHs) are lamellar and stable nanocatalysts driven by visible light. They have received much attention in the context of advanced oxidation processes. Their catalytic performance is remarkably restricted owing to undesired aggregation and the possibility of electron-hole recombination. To address these issues, we engineered carbon-nanotube (CNT)-and biochar (BC)-based CuCr LDH nanocomposites via a facile hydrothermal method. The synthesized nanocomposites were physical
Organic dyes constitute an integral part of industrial effluents. Advanced oxidation processes are efficient methods for the degradation of organic pollutants, one of the most promising of which is sonocatalysis. In this study, we aimed to immobilize MoS2 nanopetals on honeycomb-like biochar through a one-step hydrothermal method and evaluate its sonocatalytic performance in the degradation of acid blue 7 (AB7). The MoS2-Biochar composite demonstrated enhanced sonocatalytic activity, approved by
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