Acidity evolution on highly dispersed chromium supported on mesostructured silica: The effect of hydrothermal treatment and calcination temperature

Metal-Loaded Mesoporous MCM-41 for the Catalytic Wet Peroxide Oxidation (CWPO) of Acetaminophen

“…All isotherms a istic of mesoporous materials with also a significant presence of m These isotherms are characterized by three steps; the first step is ca pressures (P/P0 < 0.25) which are characteristic of monolayer adsor micropore walls. The second step takes place at relative pressure The ion metal exchanged with Cetyltrimethylammonium(CTA + ) in MCM-41 before calcination increases the incorporation inside the material [45][46][47] which means more metal oxide, the amount of the metal in each catalyst was quantified by X-ray fluorescence (XRF) being summarized in Table 1. Fe/MCM-41 and Cr/MCM-41 showed the highest percentage of metal compared to those of Cu/MCM-41 and Zn/MCM-41.…”

Fine-tuning mesoporous silica properties by a dual-template ratio as TiO2 support for dye photodegradation booster

“…Due to the carbon chains from the non-polar CTAB and gelatin groups, this causes the space framework of the silica particles to lengthen. Because gelatin with a molecular weight of 400 KDa [ 60 ] has a substantially longer chain than CTAB with a molecular weight of approximately 0.4 KDa [ [61] , [62] , [63] ], the TiO 2 -impregnated silica generated by including gelatin-CTAB has a greater pore capacity than that synthesized from CTAB or gelatin alone. Gelatin can induce the condensation of silica precursors via hydrogen bonding or electrostatic interactions between –NH 3 + and silanol species, as well as CTA + from CTAB interacting with silanol from Si precursors.…”