A5001235086- Advanced Photocatalysis Techniques
- Copper-based nanomaterials and applications
- Gas Sensing Nanomaterials and Sensors
- TiO2 Photocatalysis and Solar Cells
- Quantum Dots Synthesis And Properties
- Nanomaterials for catalytic reactions
- ZnO doping and properties
- 2D Materials and Applications
- Aerogels and thermal insulation
- Recycling and utilization of industrial and municipal waste in materials production
- Conducting polymers and applications
- Transition Metal Oxide Nanomaterials
- Advanced Nanomaterials in Catalysis
- Electrocatalysts for Energy Conversion
- Concrete and Cement Materials Research
- MXene and MAX Phase Materials
- Dyeing and Modifying Textile Fibers
- Electrochemical sensors and biosensors
- Gold and Silver Nanoparticles Synthesis and Applications
- Magnesium Oxide Properties and Applications
- Perovskite Materials and Applications
- Therapeutic Uses of Natural Elements
- Ga2O3 and related materials
- Glass properties and applications
- Groundwater and Isotope Geochemistry
Adama Science and Technology University
2018-2025
Seoul National University
2015-2022
Materials Science & Engineering
2021
Seoul Institute
2016-2018
Government of the Republic of Korea
2016-2018
Although bismuth vanadate (BiVO4) has been promising as photoanode material for photoelectrochemical water splitting, its charge recombination issue by short diffusion length led to various studies about heterostructure photoanodes. As a hole blocking layer of BiVO4, titanium dioxide (TiO2) considered unsuitable because relatively positive valence band edge and low electrical conductivity. Herein, crystal facet engineering TiO2 nanostructures is proposed control structures the BiVO4...
Abstract The global concern over water pollution caused by organic pollutants such as methylene blue (MB) and other dyes has reached a critical level. Herein, the Allium cepa L. peel extract was utilized to fabricate copper oxide (CuO) nanoparticles. CuO combined with MgAl-layered double hydroxides (MgAl-LDHs) via co-precipitation method varying weight ratios of CuO/LDHs. composite catalysts were characterized tested for degradation MB dye. CuO/MgAl-LDH (1:2) showed highest photocatalytic...
Efficient photoelectrochemical hydrogen production is demonstrated by sulphur-doped molybdenum phosphide/p-Si heterojunctions.
Abstract Nowadays, water pollution is a major concern to the globe. For this reason, various research works has been done access pure thereby minimizing effect of pollutants. In work, cobalt doped ZnO (Co-doped ZnO) via accumulation ion onto Eichhornia crassipes plant tissue for different days and combined with zinc precursor was synthesized. The resulting catalyst powder samples were characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), X-Ray...
The Cu-doped ZnO photocatalysts were prepared with a green and coprecipitation approach by using water hyacinth (
Photoluminescent carbon quantum dots (CQDs) were synthesized from lemon juice precursors via single-step, hydrothermal techniques under different temperatures to control the optical properties. The CQDs characterized by PL, illuminated UV analyzer chamber, UV–vis spectroscopy, X-ray diffractometer, Fourier-transformed infrared spectrophotometry, and zeta potential techniques. results show that had an excellent blue–green emission extending up region with high yield (Φ) in range of 14%–41%....
TiO<sub>2</sub> NRs which have a multi-function tasks such as protection from corrosion, antireflection and catalytic activities were grown in 4-inch silicon for silicon-based solar water splitting.
Abstract In recent days, metallic oxide semiconductor nanoparticles have drawn attention to the photocatalytic degradation of organic pollutants. present work, undoped and different metals (Sn, Co, Cu, Ni, Li)-doped α -PbO were successfully synthesized by a facile chemical precipitations method. The obtained further studied using characterization techniques. XRD results confirmed that prepared tetragonal, phase crystal structure without mixing other PbO phases. optical band gaps from UV–vis...
Abstract MoS 2 composed of earth‐abundant elements is considered as a promising hydrogen evolution reaction (HER) catalyst for p‐type Si photocathode owing to its appropriate adsorption free energy the edge sites and high photochemical stability in acidic electrolytes. However, direct synthesis uniform atomically thin on by usual chemical vapor deposition techniques remains challenging because weak van der Waals interaction between . Herein, controlling gas phase kinetics during...
Abstract The water pollution due to industrial effluents causes a great health problem. Hence, it is important treat wastewater before discharging the environment. In this work, hyacinth ( Eichhornia Crassipes ) plant extract mediated ZnO, CO 3 O 4 , and p-CO /n-ZnO composite catalysts were synthesized by green co-precipitation routes. resulting samples characterized x-ray diffractometer (XRD), scanning electron microscope (SEM), Fortier transform infrared (FT-IR), with other instruments....
Copper-oxide-based nanomaterials play an important role as a low-cost alternative to nanoparticles of precious metals for the catalytic reduction 4-nitrophenols. In this study, CuO were synthesized by microwave-assisted method using Cordia africana Lam. leaf extract or stabilization processes. The (NPs) characterized X-ray diffraction analysis (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and energy-dispersive (EDS). indicated that nanocrystals...
Vertically ordered hematite nanotubes are considered to be promising photoactive materials for high-performance water-splitting photoanodes. However, the synthesis of directly on conducting substrates such as fluorine-doped tin oxide (FTO)/glass is difficult achieved because poor adhesion between and FTO/glass. Here, we report FTO/glass substrate photoelectrochemical properties with NiFe cocatalysts. The synthesized by a simple electrochemical anodization method. drastically improved dipping...
Abstract Methylene blue is a toxic, carcinogenic, and non-biodegradable synthetic dye discharged from factories industries that causes severe harm to human health environmental pollution. Therefore, in this work, Co 3 O 4 /Sn-ZnO nanocomposite was synthesized using simple sol–gel method for efficient photocatalytic removal of methylene an aqueous basic medium. The structural, optical, photoluminescence, morphological, compositional properties were studied. XRD result revealed the crystal...
Abstract In this contribution, a composite from bentonite (B), CoFe 2 O 4 (CF), and hydroxyapatite (HAP) was developed by chemical synthesis route for adsorption of lead ion, Pb (II) wastewater. Initially, B/CF synthesized varying the weight ratio CF, i.e., (1– x )B/( )CF ( = 0.05, 0.15, 0.25, 0.50), followed ternary synthesis, which formulated sample (0.85B/0.15CF) different ratios HAP, y )[(0.85B/0.15CF)]/ HAP where 0.35 0.45 HAP. The 0.85B/0.15CF found to be optimal in its capacity about...
Cracks in typical mortar constructions enhance water permeability and degrade ions into the structure, resulting decreased durability strength. In this study, samples are created that self-healed their cracks by precipitating calcium carbonate them. Bacillus subtilus bacterium (10-7, 10-9 cells/mL), lactate, fine aggregate, OPC-cement, water, bagasse ash were used to make self-healing samples. Calcium lactates prepared from discarded eggshells lactic acid reduce cost of mortars, 5% control...
Abstract High-temperature structural ceramic materials require stability in terms of thermal and mechanical properties. High entropy oxides (HEOs) are among the emerging novel family advanced with peculiar functional However, their stabilities properties not well investigated. In this work, HEO systems were synthesized from binary MgO, CoO, NiO, CuO, ZnO using solid-state reaction method at high temperature, after obtaining individual through co-precipitation methods. The phase purity...