catalyst – Page 3 – TechConnect Briefs

Nanogold and Nanosilver Plastics

Pobedinsky M., Johnston J., Victoria University of Wellington, NZ

We present the innovative development of new plastic materials functionalised by nanogold and nanosilver entities which exhibit anti-microbial and catalytic effects for applications such as air and water filters, membranes, protective textiles, wound dressings and [...]

Catalyst-Free Synthesis of Carbon Nanotubes with Low-Intensity Lasers

Krishna V., Koopman B., Moudgil B., University of Florida, US

We have discovered a novel method of synthesizing carbon nanostructures such as single-wall carbon nanotubes (SWNTs), multi-wall carbon nanotubes (MWNTs) and carbon onions. The advantages of our method include, catalyst-free synthesis of CNTs at room [...]

Influence of Silica Precursor in the Cobalt Incorporation in Mesoporous Silica MCM-41 Used for the Synthesis of Single Walled Carbon Nanotubes

Ramírez F.C., López B.L., Giraldo L.F., Universidad de Antioquia, CO

In this work several silica precursors have been used for the MCM-41 mesoporous silica synthesis, i.e. Cab-O-sil, sodium silicate and TEOS with incorporation of cobalt in-situ during the synthesis of the molecular sieves. The materials [...]

Synthesis of Single Walled Carbon Nanotubes Using Cobalt Grafted in MCM-41 as Catalyst

Giraldo L.F., López B.L., Haller G.L., Universidad de Antioquia, CO

In this work (SWCNTs) have been synthesized by high pressure CO decomposition using cobalt grafted in MCM41 by means of grafting method employing cobalt (II) acetylacetonate. The reduction temperature of the metal species of this [...]

Nanomaterials for Desulfurization & Hydrogen Generation

Venugopal G., Vylkov N., Unfried K., Sapp M., Hunt A., nGimat Co., US

Energy R&D is being driven by concerns about global warming and air pollution largely attributed to pollutants from the burning of fossil fuels. While long-term energy strategies may call for the complete replacement of petroleum-based [...]

Recoverable and Recyclable Catalysts for Multi-Step Reaction Networks

Gill C.S., Phan N.T.S., Zhang Z.J., Jones C.W., Georgia Institute of Technology, US

Cascade reactions involve multiple catalysts promoting multiple reactions in a single vessel. However, these one-pot reactions generally yield a mixture of non-separable catalysts. Our research demonstrates a new approach in chemical catalysis through the use [...]

Synthesis of Narrow Diameter Multiwalled Carbon Nanotubes (MWNTs) By Catalytic Chemical Vapor Deposition For Mechanical Reinforcement Applications

Mohamed N.M., Tan Y.C., Kadir A.K., Universiti Teknologi PETRONAS, MY

Strong and versatile carbon nanotubes (CNTs) are finding new applications in improving conventional polymer-based fibers. Nanotube-reinforced composites could ultimately provide the foundation for a new class of strong and lightweight fibers with properties such as [...]

Electrochemical Storage of Hydrogen in Carbon Nanotubes

Chung S-R, Wang K-W, Perng T.P., National Tsing Hua University, TW

The electrochemical hydrogenation property of carbon nanotubes (CNTs) was investigated. A slurry consisting of CNTs and a binder was pasted on a Ni foam to form an electrode. The discharge capacity was tested in an [...]