Ag-exchanged Y zeolites (Si/Al = 2.5; Ag/Al 0.30–0.95) have been tested in the NH 3 –SCO reaction, most promising method for elimination of ammonia emissions, and deeply characterized before after reaction by using a variety techniques (XRD, TEM, UV–Vis, 109 Ag NMR, XAS spectroscopies). The active centres are 0 nanoparticles (NPs) formed under reduction conditions both activity selectivity to N...

The photocatalytic degradation of Procion blue H-B dye in biodegraded textile washwater has been investigated for the complete removal of color and maximum reduction of chemical oxygen demand (COD). Pseudomonas putida was utilized for obtaining biodegraded textile washwater. In this process, silver-doped TiO2 photocatalyst was prepared and experiments were carried out to study the effects of UV...

'Click reactions' are the copper catalysed dipolar cycloaddition reaction of azides and alkynes to incorporate nitrogens into a cyclic hydrocarbon scaffold forming a triazole ring. Owing to its efficiency and versatility, this reaction and the products, triazole-containing heterocycles, have immense importance in medicinal chemistry. Copper is the only known catalyst to carry out this reaction,...

A novel method for preparing epoxy/silver nanocomposites was developed via the in situ formation of silver nanoparticles (AgNPs) within the epoxy resin matrix while using silver nanowires (AgNWs) as a conductive filler. The silver–imidazole complex was synthesized from silver acetate (AgAc) and 1-(2-cyanoethyl)-2-ethyl-4-methylimidazole (imidazole). AgNPs were generated in situ during the curin...

The Bulgarian natural expanded mineral obtained from Bentonite AD perlite (A deposit of "The Broken Mountain" for perlite mining, near by the village of Vodenicharsko, in the municipality of Djebel), was loaded with silver (as ion form Ag 2 and 5 wt% by the incipient wetness impregnation method), and as atomic silver Ag using Tollen’s reagent (silver mirror reaction). Some physicochemical chara...

Supported metal nanoparticle catalysts are commonly obtained through deposition of metal precursors onto the support using incipient wetness impregnation. Typically, empirical relations between metal nanoparticle structure and catalytic performance are inferred from ensemble averaged data in combination with high-resolution electron microscopy. This approach clearly underestimates the importanc...

The use of metal-assisted HF chemical etching as a convenient technique to produce a few microns thick porous layer in silicon microchannels was demonstrated. Gas phase selective oxidation of rosalva to its aldehyde (costenal) was performed in glass/silicon microstructured reactors at temperatures of 375–475 °C on silver catalyst which was deposited on both porous and flat silicon surface by sp...

La0.8Sr0.2MnO3 (LSM) catalyst is prepared via a sol-gel method and modified typical silver mirror reaction. Silver ammonia solution reduced in polyvinylpyrrolidone (PVP)-containing to obtain nanoparticles sodium dodecyl sulfate (SDS) added as surfactant. The microstructure morphology of the LSM-Ag composite powder are characterized. According results, Ag particles precipitate on LSM surface ele...

The catalytic inactivation of Escherichia coli in water by a cerium (Ce)-promoted silver-loaded aluminum phosphate (Ag/ AlPO4) catalyst using molecular oxygen was investigated. With optimum Ce content, the Ag(Ce)/AlPO4 catalyst exhibited strong bactericidal activity. The process of decomposition of the cell wall and cell membrane was directly observed by TEM. The different morphological changes...