Synthesis, functionalization, and environmental application of silica-based mesoporous materials of the M41S and SBA-n families: A review

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

“…Furthermore, it can be functionalized with diverse metal oxides (active phase of the catalyst), resulting in high thermal and hydrothermal stability. 155–161 In addition, it exhibits great potential as a support for the active phase of heterogeneous catalysts and results in easy diffusion due to the minimum obstruction by the adjustment of its pore diameter. 162 In the preceding section, different DFNS- and MCM-41-modified catalysts for CO 2 fixation reactions were summarized.…”

Highly ordered pure and indium-incorporated MCM-41 mesoporous adsorbents: synthesis, characterization and evaluation for dye removal

“…A simple way to activate the mesoporous silica is via introducing a heteroatom in its framework. This way not only improves the physical, chemical properties but also enhances the ion-exchange capacity and generates a large number of active sites [22][23][24][25]. Elements of the third main group including B, Al, Ga, In, Tl and some transition metals such as Ti, Fe, Cu, Co, Ni, Ce as well as Zn are considered as the most important candidates for doping the framework of MCM-41 molecular sieves [26][27][28][29][30][31].…”

Organic Dyes versus Adsorption Processing

“…In all the cases, the uptakes derived by the model (Equation (1)) were in accordance with the corresponding experimental values. The adsorption followed the pseudo-first kinetic equation, which in the published manuscript was written as: log [MO] ad,e − [MO] ad,t = log [MO] ad,e − K p1 t (1) where K p1 represents the model constant. The procedure followed to reuse the adsorbent was as follows: 0.1 M NaOH (desorption), 0.1 M HNO 3 (neutralizing), washing with water until pH 7, and lastly drying.…”

“…The importance of these adsorptive methodologies in the removal of organic dyes from waters is reflected in the number of investigations and reviews published in the years. Recently, several reviews about the use of a given type of adsorbents in this role have been published, including silica-based mesoporous materials of the M41S and SBA-n families [ 1 ], different types of graphene-based materials [ 2 , 3 ], biochars [ 4 ], metal–organic frameworks (MOF) [ 5 , 6 ], various types of polymeric nanofibers [ 7 ], metal-doped porous carbon materials [ 8 ], and activated carbon fibers [ 9 ].…”