Publications by authors named "Jong-Man Yoo"
Crown-Ether-Modified SBA-15 for the Adsorption of Cr(VI) and Zn(II) from Water.
Materials (Basel)
September 2021
Recently, the release of some metal ions to the environment has been observed to cause serious damages to human health and the environment. Herein, a chromium(VI)- and zinc(II)-selective adsorbent (CB18crown6/SBA-15) was successfully fabricated through the covalent attachment of 4'-carboxybenzo-18-crown-6 (CB18crown6) as a ligand on mesoporous silica support (SBA-15). The CB18crown6/SBA-15 adsorbent was characterized by Fourier-transform infrared (FTIR) spectrometry, X-ray diffraction (XRD), N adsorption-desorption, thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and transmission electron microscopy (TEM).
View Article and Find Full Text PDFArticle Synopsis
- Highly monodispersed silica nanoparticles (SiNPs) were created using a specialized fluorinated surfactant and compared to five other surfactants for efficiency.
- The size of the SiNPs, ranging from about 50-200 nm, was manageable by adjusting the amount of surfactant used.
- The short alkyl-chain fluoro surfactant proved to be more effective in producing uniform SiNPs compared to longer alkyl-chain fluoro or non-fluorinated surfactants.
Mesoporous silica nanospheres (MSNs-AH) with a Schiff-base ligand were synthesized using a snap-top strategy and post-synthetic grafting strategy for metal ion adsorption. The mesoporous MSNs-AH with the Schiff-base ligand were used for the adsorption of metal ions from artificial wastewater and artificial seawater. The adsorption characteristics of the functionalized adsorbents for various metal ions were tested for different adsorption times (1~48 h) in artificial wastewater and artificial seawater.
View Article and Find Full Text PDF