Publications by authors named "Bai Cheolho"
Article Synopsis
- Extensive use of fossil fuels leads to high CO2 emissions, necessitating the development of eco-friendly energy storage materials.
- Hybrid supercapacitors (HSCs) are emerging materials that provide quick charging and high capacitance retention, with the current study focusing on a composite of g-CN nanosheets and CoO/CeO heterostructures as effective electrodes.
- The CoCe/g-CN electrodes demonstrate significantly higher specific capacitance (1088.3 F/g) and impressive stability (96% over 5000 cycles), making them promising options for advanced energy storage solutions.
The study utilized a simple and cost-effective approach to improve the photoelectrochemical (PEC) water-splitting performance of various materials, including reduced graphene oxide (rGO), tin oxide nanostructures (SnO), and rGO/SnO composites. The composites examined were rS15, containing 15 mg of rGO and 45 mg of SnO, and rS5, with 5 mg of rGO and 50 mg of SnO, tested in a sodium hydroxide (NaOH) electrolyte. Notably, the rS5 electrode showed a significant increase in PEC efficiency in 0.
View Article and Find Full Text PDFAntibiotic residues persist in the environment and represent serious health hazards; thus, it is important to develop sensitive and effective detection techniques. This paper presents a bio-inspired way to make water-soluble fluorescent polymer carbon dots (PCDs@PVA) by heating biomass precursors and polyvinyl alcohol (PVA) together. For example, the synthesized PCDs@PVA are very stable with enhanced emission intensity.
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- The study focuses on developing novel g-CN/Ni-doped ZrO hybrid catalysts for effectively removing toxic pollutants from wastewater through photocatalysis.
- The synthesized catalysts exhibited a unique structure with ZrO nanospheres on g-CN nanosheets, leading to improved charge separation and catalytic performance.
- Tests showed that these catalysts achieved high degradation efficiencies of approximately 92% for rhodamine B and 89% for tetracycline, making them a promising solution for water treatment.
Article Synopsis
- Increased use of antibiotics has led to environmental problems, particularly in drinking water, prompting the exploration of heterogeneous photocatalysis as a potential solution for removing toxic compounds from wastewater.
- In this study, hybrid composites made from ZnInS and g-CN were synthesized using a hydrothermal method to effectively degrade sulfamethoxazole, achieving 89.4% degradation within 2 hours under visible light.
- The newly developed composites showed enhanced photoelectrochemical properties, generating a photocurrent density 19.2 to 29.9 times greater than existing samples, showcasing their potential as effective catalysts for both pollutant degradation and hydrogen production.
Article Synopsis
- Photodegradation using metal oxides is effective for breaking down organic pollutants like dyes due to their low cost and high stability.
- The study synthesized Cu-doped VO nanosheets and found they had better photocatalytic efficiency in degrading methyl blue (MB) and rhodamine B (RhB) under visible light compared to undoped samples.
- Analysis showed that the Cu dopant improved charge separation and mobility, leading to enhanced photocatalytic activity, thanks to factors like smaller crystalline size and increased surface area.
Novel g-CN functionalized yttrium-doped ZrO hybrid heterostructured (g-YZr) nanoparticles have been synthesized to investigate photocatalytic Cr(VI) reduction as well as electrochemical energy storage applications. The nanoparticles have been characterized to examine their structural, optical, and photocatalytic properties. XRD confirmed the incorporation of dopant ions and heterostructure development between g-CN and doped ZrO.
View Article and Find Full Text PDFPure ZrO, graphitic carbon nitride, Cu-doped ZrO nanoparticles (Cu-Zr), and doped Cu-Zr nanoparticles decorated on the g-CN surface (g-CuZr nanohybrids) were successfully prepared by a hydrothermal technique. Synthesized catalysts were examined by XRD, FE-SEM, TEM, UV-Vis spectroscopy, photoluminescence (PL), and BET surface measurements, respectively. The photocatalytic reduction of Cr(VI) photoreduction as well as energy storage supercapacitor applications were thoroughly investigated.
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