Fibrous silica mesoporous ZSM-5 for carbon monoxide methanation

Recent developments in state-of-the-art silica-modified catalysts for the fixation of CO2 in epoxides to form organic carbonates

“…Specifically, for selective catalysis, DFNS has been loaded with various noble metal nanoparticles for different nanocatalytic transformations such as hydrogenation/dehydrogenation reactions, 225,226 reduction reactions, 227 and CO oxidation. 228 Interestingly, DFNS can also be modified into solid acid catalysts and base catalysts for various industrial processes such as hydrocracking reactions, 229,230 CH 4 formation, 231 fructose dehydration, 232 and cyclization reactions, 233 and as Fenton-catalysts for the degradation of waste-water pollutants. 234 However, for the extensive industrial and large-scale applications of these materials, new catalyst design attempts should be made to prepare stable, less-time consuming, greener materials by using cost-effective and abundant non-noble or transition metal configurations or substitute metals with greener alternatives to form sustainable and environmentally benign systems.…”

Platinum‐promoted fibrous silica Y zeolite with enhanced mass transfer as a highly selective catalyst for n ‐dodecane hydroisomerization

“…All the catalysts have shown Type 4 isotherms defined with H1 hysteresis loops. Typically, such isotherms describe materials with characteristic mesoporous nature as depicted in Figure . However, N 2 uptake occurring at lower P/P o uniquely describes the microporous characteristic of the catalysts, while the intraparticle and interparticle pore characteristics are assigned by N 2 uptake at P/P o = 0.2 and 0.9, respectively .…”

Two-Dimensional Porous SiO2 Nanostructures Derived from Renewable Petal Cells with Enhanced Adsorption Efficiency for Removal of Hazardous Dye

“…FT-IR spectra for the calcined HS x samples synthesized with different TEOS concentrations show characteristic adsorption bands at approximately 470, 802, and 1053 cm –1 (Figure S1), which are ascribed to the deformation models of Si–O–Si [δ­(Si–O–Si)], symmetric and asymmetric stretching of Si–O–Si [ν s (Si–O–Si) and ν as (Si–O–Si), respectively]. , The adsorption bands at 1640 and 3445 cm –1 can be assigned to bending and stretching bands of H–O–H [δOH­(H–O–H) and νOH­(H–O–H)]. Weak bands at 2912–2855 cm –1 ascribed to the saturated C–H stretching vibrations appear in all HS x samples, , indicating a few residual C atoms exist in the samples.…”