نتایج جستجو برای: porous alumina template
تعداد نتایج: 104084 فیلتر نتایج به سال:
Dual?templating surface gel into thin SSZ?13 zeolite membrane for fast selective hydrogen separation
Highly permeable zeolite membranes are desirable for fast gas separation in the industry. Reducing membrane's thickness is deemed to be an optimal solution permeability improvement. Herein, we report synthesis route of thin SSZ-13 via conversion template-contained surface gels. The gel fully crystallized into crack-free assisted with dual templates N,N,N-trimethyl-1-adamantammonium hydroxide (T...
This paper describes an investigation into how combined carbon nanotube doping and surface nanostructuring affects the properties of polystyrene. Multiwall nanotubes (MWCNTs) have unique anisotropic electrical that can be utilized for light absorption, electromagnetic shielding nanoscale electostatic forces. Polystyrene was doped with 5 wt% MWCNTs resulting composite wetted onto a porous anodic...
The synthesis of highly-crystalline porous TiO(2) microspheres is reported using ultrasonic spray pyrolysis (USP) in the presence of colloidal silica as a template. We have exploited the interactions between hot SiO(2) template particles surface and TiO(2) precursor that occur during reaction inside the droplets, to control the physical and chemical properties of the resulting particles. Varyin...
This project was dedicated to solving basic scientific issues and developing the scientific basis that underlies the improvement of super-dense memories, towards the terabit per square inch goal and the engineering of chemical and biological sensors. Both applications rely on porous materials among which porous alumina is the most promising. The research under this project in each of the object...
Porous Pt-Ni-P composite nanotube arrays (NTAs) on a conductive substrate in good solid contact are successfully synthesized via template-assisted electrodeposition and show high electrochemical activity and long-term stability for methanol electrooxidation. Hollow nanotubular structures, porous nanostructures, and synergistic electronic effects of various elements contribute to the high electr...
H3PW12O40 (PW12) was immobilized over mesoporous alumina through the reaction of mesoporous alumina functionalized 3-aminopropyl triethoxy silane (3-APTES) and PW12. The surface properties of the functionalized nanocomposite was analyzed by a series of characterization techniques like elemental analysis, FTIR and XRD. XRD and adsorption–desorption analysis shows that the mesostructure of silica...
In the current research project, sol-gel electrophoresis technique was utilized to grow titanium dioxide (TiO2) nanotubes. A titanium sol was prepared using organometallic precursors of titanium to fill the template channels. The prepared solwas driven into nanopores of porous anodic aluminum oxide templates under the influence of a DC electric field to form nanotubes on the pore walls. Tube fo...
The review presents synthetic approaches to modern rhenium-based catalysts. Creation of an active center is considered as a process of obtaining a nanoparticle or a molecule, immobilized within a matrix of the substrate. Selective chemical routes to preparation of particles of rhenium alloys, rhenium oxides and the molecules of alkyltrioxorhenium, and their insertion into porous structure of ze...
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