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Structural design of bimodally-porous alumina adsorbent for Congo red
임은미,문건대 한국공업화학회 2020 한국공업화학회 연구논문 초록집 Vol.2020 No.-
Alumina is one of the most important inorganic materials, which widely used as a catalyst, catalytic support, and adsorbent. Its performance in these applications depends on its crystal structure, textural properties, and morphology. For the application, porous alumina has been investigated to maximize its surface area through various synthetic methods such as scaffolding and nanocasting. However, most of these methods are hard to control the pore size due to complex and cost-ineffective multi-steps. In this study, we synthesized an ordered bimodally-porous alumina to produce mesopore and macropore in a separately-controllable manner via facile solvent-deficient hydrolysis method. The bimodally-porous alumina was proved to be a good material as an adsorbent to remove organic dye, originating from its high surface area and the enhanced mass transport.
Morphological effect of noble metal nanostructures on catalytic reduction of 4-nitrophenol
서호준,문건대,서원철,이한주,함석원,임태호 한국공업화학회 2020 한국공업화학회 연구논문 초록집 Vol.2020 No.-
Au nanostructures and 0D Ag nanoparticles were loaded on the template surface and used as catalysts for reduction of 4-nitrophenol. 2D Au nanostructures with controlled edge length and thickness were synthesized into three different polygonal shapes containing smooth/jagged-edged and single/multiple-layered nanosheets. We successfully fabricated a robust and reusable catalyst by incorporating 2D Au nanostructures in a cellulose paper as a flexible substrate through the monolayer assembly and transfer method. In addition, we used Ag NPs as another catalyst material. It was grown without aggregation on the surface of the Fe<sub>3</sub>O<sub>4</sub> coated with PS for reduction of 4-nitrophenol. Despite their micrometer-scaled lateral dimension, the high catalytic activity of the 2D Au NSs was observed in the reduction reaction of 4-nitrophenol to 4-aminophenol in the presence of NaBH<sub>4</sub>. Also, the nanometer-scaled 0D Ag NPs showed high catalytic activity for reduction of 4-nitrophenol to 4-aminophenol. Keywords: Catalyst, noble metal, mophology
Facile synthesis of hierarchically mesoporous and macroporous metal oxide for catalyst supports
박영근,문건대 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
There have been massive research on the synthesis of mesoporous metal oxides through the conventional sol-gel method. Recently, macroporous metal oxides with mesopores can be a good candidate as catalyst support in terms of mass transport. Herein, we report the fabrication of porous metal oxides, alumina and ceria, by applying solid-state method for mass production. The synthetic parameters can be varied to control the mesoporosity, while macropores can be formed using polymeric beads and inorganic spheres as a macropore template. In this presentation, the detailed study regarding synthetic conditions will be provided by investigating physical properties.