By using the most popular method of thermal condensation dicyandiamide in a semi-closed system, graphitic carbon nitrides (gCNs) were synthesized at 500, 550, and 600 °C. The resulting materials comprehensively analyzed via X-ray photoelectron spectroscopy (XPS) powder diffraction (XRD)techniques. We show that use routine analytical methods provides an insight into structure nitride materials. analysis geometric linear structures fully condensed polymeric was performed ranges within which...

Graphitic carbon nitride (g-C3N4) was obtained by thermal polymerization of dicyandiamide, thiourea or melamine at high temperatures (550 and 600 °C), using different heating rates (2 10 °C min-1) synthesis times (0 4 h). The effects the conditions type precursor on efficiency g-C3N4 were studied. most efficient from 53%, while in process much smaller, 26% 11%, respectively. On basis results provided X-ray diffraction (XRD), photoelectron spectroscopy (XPS), infrared (FTIR),...

We report herein HMF (5-hydroxymethylfurfural) and furfural oxidation to 2,5-furandicarboxylic (FDCA) furoic acids, respectively, in water, under base-free conditions using supported gold nanoparticles. Prepared catalysts showed high catalytic activity environmentally friendly conditions. Especially, the use of enables getting rid most usually needed neutralization step generating salts that must be further handled/eliminated. conversion selectivity desired products depend on basicity...

Selective catalytic reduction of halogenated nitroaromatic compounds is the most widely used method for synthesis anilines, important intermediates in chemistry pesticides, herbicides, drugs, pigments and dyes. This review reports progress made last decade field hydrogenation nitro arenes with use heterogeneous catalysts. The first sections contain a concise report on applications methods their preparation reaction pathways haloaromatic compounds. Subsequent discuss properties platinum group...

Trametes versicolor 's laccase (Lac TV ) was efficient catalyst in HMF oxidation to FDCA. Its use an enzymatic and photocatalytic cascade process permitted a 40-fold increase FDCA productivity compared traditional batch systems.

Organosilicon compounds, because of their unique properties, are widely used in a variety organic processes, and thus the constant improvement current methods is still needed. We present slurry-phase hydrosilylation reactions using novel supported ionic liquid-phase (SILP) catalysts containing rhodium complexes immobilized four phosphonium liquids (ILs) on silica support. The obtained new SILP were analyzed by infrared technique, low-temperature nitrogen physisorption at 77 K, scanning...

This study is devoted to the evaluation of influence phosphate dopants on reactivity Nb2O5-based nanomaterials in combined catalytic activation H2O2 and elimination methylene blue (MB) from an aqueous solution via adsorption chemical degradation. For this purpose, several niobia-based catalysts doped with various amounts were prepared by a facile hydrothermal method subsequent calcination. Phosphate doping was shown strongly enhance ability Nb2O5 activate H2O2, as well adsorb degrade MB. The...

Furfural (FF) is a strategic product for the development of highly valued chemicals from biomass. The oxidation FF, furoic acid (FA), an important precursor synthesis green esters, such as methyl furoate. Taking into account issues with direct furfural oxidation, derivatives, alkyl furoates, can be easily prepared via oxidative esterification. Here, Au nanoparticles that were immobilized on alkaline-earth metal oxide supports studied esterification while using alcohol both reactant and...

Pt, Ru, and Ir were introduced onto the surface of graphitic carbon nitride (g-C

Abstract The use of an iridium active phase and magnesium fluoride as a support allowed us to obtain new catalysts high activities in the hydrogenation toluene. Ir/MgF 2 catalyst was four times more than system supported on commercial Al O 3 . nature precursors [H IrCl 6 or Ir 4 (CO) 12 ] pretreatment conditions (reduction oxidation/reduction) appeared have clear effect activity catalysts. For obtained from carbonyl, highest after direct reduction catalysts, whereas for hexachloroiridium...

1,6-Hexanediol is a relevant building blocks that could be obtained from biomass and transformed under base free conditions into adipic acid used for polymer synthesis.

This study focuses on the catalytic properties of ruthenium catalysts supported modified silicalite-1 (with an MFI structure). By post-synthesis modification with solutions alkali metal compound, a novel and cost-effective method was discovered to create basic centers surface supports. The not only affected basicity supports but also their porosity. influence type solution (KOH or NaOH) its concentration (0.1 M 1.0 M) both porosity investigated. materials were employed as for (1 wt.% Ru)...

Ru and Ir catalysts, which are not particularly selective under the conditions of conventional hydrogenation carried out with molecular hydrogen, when used in Aqueous-Phase Reforming/Hydrogenation (APR/Hyd) process, become >99.9% for o-chloronitrobenzene to o-chloraniline.

The modification of commercial silica with solutions NH4F or NH4Cl salts, followed by thermal treatment, enabled generation the acidic sites in SiO2 and changed its textural properties. use ammonium salts solution also caused additional porosity. Using significant decrease specific surface area increase average pore diameter. number strength resulting acid depend on nature anion applied salt concentration solution. It has been found that sample treated presented higher total acidity...

An aniline exclusive: The introduction of copper to a Ru/MgF2 catalyst results in the strong inhibition side reaction hydrodechlorination during hydrogenation ortho-chloronitrobenzene and allows ortho-chloroaniline be produced at 100 % selectivity. Detailed facts importance specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available submitted by authors. Please note: publisher is responsible for content...

Research was carried out on the incorporation of divalent cobalt cations into crystalline structure MgF2 to form Mg x Co1-x F2 binary fluorides, which had not been investigated before. The above fluorides were obtained by precipitation from aqueous solution magnesium and nitrates with ammonium fluoride. Binary containing 0.6, 7.5 37.7 mol% CoF2 prepared. effects treatment temperature (300, 400 °C) atmosphere (oxidizing or reducing) (XRD, TPR-H2, UV-Vis), texture (low-temperature N2...