نتایج جستجو برای: thermal synthesis
تعداد نتایج: 618817 فیلتر نتایج به سال:
Metal nanoparticle-decorated carbon spheres (mn-CSs) are prepared by combining one-pot hydrothermal synthesis and post-synthesis modification. The former sol-gel type process is employed to obtain heteroatom-containing polymer spheres (PSs), which easily attract metal species that, during thermal treatment, are initially converted to nanoparticle-decorated PSs and finally to mn-CSs.
The synthesis of siloles with substitution patterns that are continuative toward natural product synthesis are described. Their reactivity in Diels-Alder chemistry was explored through thermal, Lewis acid, and high-pressure reactions. Furthermore, bicyclic adducts were oxidatively cleaved to reveal a highly functionalized cyclohexene core.
High-performance Cu/ZnO/(Al(2)O(3)) methanol synthesis catalysts are conventionally prepared by co-precipitation from nitrate solutions and subsequent thermal treatment. A new synthesis route is presented, which is based on similar preparation steps and leads to active catalysts, but avoids nitrate contaminated waste water.
Nano-peanut shell‑OSO3H nanoparticles were simply prepared and characterized by the scanning electron microscopy (SEM), transmission electron microscope (TEM), fourier transform infrared (FT-IR), energy dispersive X-ray spectroscopy (EDX), and thermal analysis techniques (TGA/DTG). The catalytic activity of nano-peanut shell‑OSO3H was studied in the synthesis of biological...
In this study, a novel acidic magnetic dicationic ionic liquid was prepared in three steps to serve as a green catalyst in organic synthesis. The newly synthesized catalyst was characterized UV- VIS, and VSM analysis. Additionally, the decomposition steps acatalyst were investigated by thermal analysis techniques (TGA/DSC). The synthesized acidic magnetic dication...
The aim of this study was to investigate the synthesis of calcium aluminate cement with and without phosphate additive by combustion synthesis. After preparing the gel from a solution containing aluminum and calcium nitrates and glycine fuel and ammonium dihydrogen Phosphate, its combustion was performed at 400 ° C. X-ray diffraction pattern and thermal analysis of the combustion sample showed...
in this research, the effect of catalyst type on the cnts synthesis was investigated. the carbonnanotubes (cnts) were produced on stainless steel substrates and two of catalyst with differentcharacteristics by using thermal chemical vapor deposition (tcvd) method. the catalysts have theimportant role for the growth carbon nanotubes (cnts). acetylene gas (c2h2) diluted by nh3 wasused as the reac...
in present studies the synthesis, characterization and biological properties ofoxovanadium(iv) coordination compounds of 4[n-(4′-ethylbenzalidene)amino] antipyrinethiosemicarbazone (ebaapts) and 4[n-(2′,4′-dimethylbenzalidene)amino] antipyrinethiosemicarbazone (dmbaapts) with the general composition vox2l (x = c1-, br-, i-, no3-or ncs-) and vo(cio4)2(l)h2o (l = ebaapts or dmbaapts) are describe...
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