Characterization and performance of Pd/Ni(Zn)-aluminate catalysts for acetylene hydrogenation

Research on Chemical Intermediates - 0.03 wt% Pd catalysts on nickel and zinc aluminate supports were prepared by impregnation. The samples were characterized by XRD, BET, ICP, SEM, EDS,...     

Solvent-free Knoevenagel Condensations over TiO2

A study involving the scope of substrates in the Knoevenagel reaction under SFC has been conducted. Reactivity trends favored formation of the condensation product using both electron deficient and rich aryl aldehydes. A recycling study confirmed that the reaction medium could be used multiple times affording, with each run, the desired condensation product in excess of 95% conversion.     

Synthesis and characterization of SnO2/(NH4)2‐SnCl6 nanocomposites loaded on activated carbon and its application for adsorption of methylene Blue and Orange G

The present study deals with the synthesis and characterization (FE‐SEM, particle size distribution, XRD and point of zero charge) SnO₂/(NH₄)₂‐SnCl₆ nanocomposites loaded on activated carbon (SnO₂/(NH₄)₂‐SnCl₆‐NCs‐AC) and its subsequent application for the simultaneous removal of Methylene Blue (MB) and Orange G (OG) from aqueous solution. Response surface methodology (RSM) based on central composite design (CCD) give trend of influencing responses with respect to five parameters such as contact time (X₁), OG concentration (X₂), MB concentration (X₃), adsorbent mass (X₄) and pH (X₅). In later stage following recognition of significant variables and interaction, quadratic model generated which are able to predict the dyes removal in different conditions. Justification and selection of significant terms was conducted based on analysis of variance and Fisher's F‐test Optimal value of contact time, OG concentration, MB concentration, adsorbent mass and pH were set at 4.0 min, 10 mg l^?1, 20 mg L^?1, 0.015 g and 6.0, respectively, which lead to achievement of best experiment removal percentage of 97.0 and 99.5% OG and MB respectively, from their binary solutions. The whole experimental data follow pseudo‐first‐order and pseudo‐second‐order rate equations. The fitting experimental data to more available conventional model like Langmuir, Freundlich, Temkin and Dubinin‐Radushkevich isotherm models revel more ability of Langmuir model (with R² > 0.997) for explanation of system in equilibrium. The adsorption efficiency remained high even after the five cycle of reuse (99.76% and 95.56% for MB and OG, respectively).     

Chromatographic Behavior of Food Additives on Thin Layers of Titanium(IV) Silicate Ion-Exchanger

JPC – Journal of Planar Chromatography – Modern TLC - The chromatographic behavior of acetaldehyde, o-anisidine, ascorbic acid, benzoic acid, butylated hydroxyanisole, butylated...     

Kamonolol acetate from Ferula pseudalliacea as AChE inhibitor: in vitro and in silico studies

Structural Chemistry - Alzheimer’s disease is one of the most common causes of dementia. Acetylcholinesterase has been considered as the main therapeutic target in the treatment of...     

Nanocrystalline ZnO for Knoevenagel Condensation and Reduction of the Carbon,Carbon Double Bond in Conjugated Alkenes

A novel efficient and eco‐friendly nanocrystalline ZnO catalyst was used for the Knoevenagel condensation and for the reduction of C?C double bonds at room temperature in the absence of solvents.