Methods for Preparation of Catalytic Materials

Functionalization of acidified multi-walled carbon nanotubes for removal of heavy metals in aqueous solutions

“…The catalyst/support (Fe-Co/CaCO 3 ) was prepared by impregnation method [12]. In the first step, commercial CaCO 3 was milled for 10 h to decrease the crystallite size and increase the surface area (see Table 3).…”

Novel synthesis of thick wall coatings of titania supported Bi poisoned Pd catalysts and application in selective hydrogenation of acetylene alcohols in capillary microreactors

“…There are well-developed methods of introduction of catalytically active metal nanoparticles into oxide matrixes, but subsequent deposition of the matrix uniformly on the reactor walls is still a very challenging task, especially for concentrated sols and long reactors. [21][22][23] Two main methods are used to obtain a uniform coating on a substrate: spin-and dip-coating. In the spin-coating technique, the substrate is first covered with an excess of precursor solution that is later removed by centrifugal forces leaving a thin uniform coating after solvent evaporation.…”

Effect of Modification/Doping on Gas Sensing Properties of SnO2

“…This is a homogeneous process which results in a continuous transformation of a solution into a hydrated solid precursor (hydrogel). Sol-gel methods have been recognized for their versatility which allows control of the texture, composition, homogeneity, and structural properties of the finished solids [31]. Pd-doped SnO 2 -based sensor was obtained by Lim using sol-gel process.…”