|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Powder Materials for Energy Applications
||Fabrication of Uniform-sized Hemispherical Mesopores on Gold-coated Silver Nanocubes for Enzyme Immobilization
||Seongcheol Choi, Olivia A. Graeve
|On-Site Speaker (Planned)
We demonstrate a procedure to fabricate gold-coated silver nanocubes containing hemispherical mesopores for applications as a catalytic substrate for enzyme immobilization. First, polyvinylpyrrolidone-covered silver nanocubes (45 nm) and uniform-sized silica nanoparticles (6 nm) were fabricated. The silica nanoparticles were deposited onto the polyvinylpyrrolidone-covered silver nanocubes by using physical adsorption. An ultra-thin gold layer was then grown on the surface of the silver nanocubes and the attached silica nanoparticles were etched off the particles using an alkali hydroxide solution at high temperature. Characterization of the materials was completed using scanning electron microscopy and X-ray diffraction. The mono-sized mesopores in the gold layer are designed to serve as sites to physically confine the enzyme, chloroperoxidase, to maximize their life span and enzymatic activity for desulfurization. This nano-architectured enzymatic catalyst is expected to increase the energy efficiency of the desulfurization of petroleum refining processes.
||Planned: Supplemental Proceedings volume