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Continuous Synthesis of Monodisperse Spherical Silica Powder Using Tubular Reaction System
Young-Sang Cho, Chiyeop Hwang, Seong-Jun Kim, U-Hyeon Park
Korean J. Met. Mater. 2022;60(6):409-422.   Published online 2022 May 24
DOI: https://doi.org/10.3365/KJMM.2022.60.6.409

Abstract
In the present study, monodisperse silica nanospheres were synthesized using a tubular reaction system in a continuous way. Screw-type blades were inserted inside a T-mixer for static mixing of the reactant streams which consisted of TEOS and NH4OH/H2O diluted with ethanol, for the continuous synthesis of the silica suspension. The..... More

                        
Optimization of Oil Adsorption Capacity by Aerogel Powder Synthesized Using Emulsion Droplets as Micro-reactors in Ambient Conditions from Sodium Silicate as Precursor
Young-Sang Cho, Sohyeon Sung, Seung Hee Woo, Young Seok Kim
조영상, 성소현, 우승희, 김영석
Korean J. Met. Mater. 2021;59(2):99-112.   Published online 2021 Feb 5
DOI: https://doi.org/10.3365/KJMM.2021.59.2.99
Abstract
In this study, silica aerogel particles were synthesized from emulsion droplets as micro-reactors at room temperature under ambient pressure. An economical precursor, sodium silicate, was used as the starting material for silica, and an emulsification technique was applied to form droplets in continuous phase. By controlling the composition of the... More
                           Cited By 1
Synthesis of Porous Silica Particles for the Adsorption of Organic Dye in Aqueous Medium
Young-Sang Cho, Sol Jeong, Soyoung Nam
Korean J. Met. Mater. 2020;58(5):304-318.   Published online 2020 Apr 20
DOI: https://doi.org/10.3365/KJMM.2020.58.5.304

Abstract
This study investigated the removal of the organic dye like methylene blue using porous particles in a batch adsorption process. Porous silica microparticles were synthesized with macropores or meso-macropores and used as adsorbent particles. The hierarchically porous structures with additional mesopores were found to be more effective adsorbent than simple..... More

                           Cited By 1
Synthesis of Porous Particles by Electrospray-Assisted Self-Assembly for Water-Repellent or Photocatalytic Surfaces
Young-Sang Cho, Younghyun Lee, Nahee Ku, Sugueun Ji, Young Seok Kim
Korean J. Met. Mater. 2020;58(2):112-124.   Published online 2020 Jan 8
DOI: https://doi.org/10.3365/KJMM.2020.58.2.112

Abstract
In this study, an electrospray technique was used for the synthesis of macroporous ceramic particles, such as silica or titania, by a colloidal templating method. For this purpose, a suspension of polystyrene nanospheres was synthesized by dispersion polymerization for use as sacrificial templates. The feed solution containing a ceramic precursor..... More

                           Cited By 1
Fabrication of Porous Titania Particles from Complex Fluids by Spray Drying Process and Their Applications
Young-Sang Cho
Korean J. Met. Mater. 2017;55(4):264-273.   Published online 2017 Apr 6
DOI: https://doi.org/10.3365/KJMM.2017.55.4.264

Abstract
In this study, a spray drying system was used to prepare macroporous titania micro-particles for applications including UV blocking materials and photocatalysts. To synthesize the macroporous particles a colloidal templating method using polymeric beads as sacrificial templates and a titania nano-colloid as precursor material was adopted. The resulting porous titania..... More

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