Macro-porous silicon, which can be used as an anode material for lithium-ion batteries (LIBs), was synthesized by the reduction of macro-porous silica, which had been prepared by template method, using aluminum metal fine powder as the reducing agent. A TEOS-PMMA (tetra-ethyl-ortho-silicate, poly-methyl-meta-acrylate) mixture solution was used as a precursor to prepare the macro-porous silica. PMMA was synthesized as spherical type nano-beads using a suspension polymerization method. Silica gel was formulated by the hydrolysis of TEOS and macro-sized pores were formed in the silica particles by the decomposition of PMMA during the thermal treatment at high temperatures. The prepared macro-porous silica was mixed with aluminum fine powder in methyl alcohol, and then treated at high temperature under argon-gas conditions for the reduction of silica. The silica/aluminum ratio was controlled to 0.5, 0.75, 1.0, 1.5 and 2.0, and the reducing temperature was controlled in the range, 550-700 °C. The formation of silicon was confirmed by X-ray diffraction and X-ray photoelectron spectroscopy.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1166/jnn.2018.15497 | DOI Listing |
J Chromatogr B Analyt Technol Biomed Life Sci
January 2025
Northwest University Chang An Hospital, Faculty of Life Sciences and Medicine, Northwest University, Xi'an, Shaanxi 710069, China; Department of Clinical Pharmaceutics, Chang An District Hospital, Xi'an, Shaanxi 710118, China. Electronic address:
Immobilizing the target protein on a solid surface with controlled orientation, high specificity, and maintained activity is a proven strategy to enhance the stability of the protein. In this study, we employed an ultra-high affinity protein pair consisting of a mutant of colicin E7 Dnase and its corresponding inhibitor, immunity protein 7(Im7), to develop an immobilized α-adrenoceptor (α-AR) column. Briefly, we expressed α-AR fused with CL7 as a tag at its C-terminus in Escherichia coli cells.
View Article and Find Full Text PDFMembranes (Basel)
March 2023
Biotechnology, Environment and Health Laboratory, Jijel University, Jijel 18000, Algeria.
Multilayer ceramic membranes to be used for bacteria removal by filtration were prepared from ceramic materials. They consist of a macro-porous carrier, an intermediate layer and a thin separation layer at the top. Tubular and flat disc supports were prepared from silica sand and calcite (natural raw materials), using extrusion and uniaxial pressing methods, respectively.
View Article and Find Full Text PDFFront Chem
March 2023
Institute of Chemical Technology, Leipzig University, Leipzig, Germany.
Membranes (Basel)
March 2020
Department of Chemical Systems Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
Silica-based membranes prepared by chemical vapor deposition of tetraethylorthosilicate (TEOS) on γ-alumina overlayers are known to be effective for hydrogen separation and are attractive for membrane reactor applications for hydrogen-producing reactions. In this study, the synthesis of the membranes was improved by simplifying the deposition of the intermediate γ-alumina layers and by using the precursor, dimethyldimethoxysilane (DMDMOS). In the placement of the γ-alumina layers, earlier work in our laboratory employed four to five dipping-calcining cycles of boehmite sol precursors to produce high H selectivities, but this took considerable time.
View Article and Find Full Text PDFMacro-porous silicon, which can be used as an anode material for lithium-ion batteries (LIBs), was synthesized by the reduction of macro-porous silica, which had been prepared by template method, using aluminum metal fine powder as the reducing agent. A TEOS-PMMA (tetra-ethyl-ortho-silicate, poly-methyl-meta-acrylate) mixture solution was used as a precursor to prepare the macro-porous silica. PMMA was synthesized as spherical type nano-beads using a suspension polymerization method.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!