Recent advanced development of metal-loaded mesoporous organosilicas as catalytic nanoreactors

Abstract

An up-to-date overview of the designability and catalytic application of transition metal-loaded mesoporous organosilica nanoreactors will be highlighted. Their synthetic approaches and catalytic performance are summarized.

Fabrication of Mn-Doped SrTiO3/Carbon Fiber with Oxygen Vacancy for Enhanced Photocatalytic Hydrogen Evolution

“…Based on the Kubelka-Munk theory, the band gap (Eg) of semiconductor materials can be calculated according to Equation (1) [38]. As shown in Figure 9b, hν is drawn with (Ahν) 2 , from which it can be obtained that the band gap of single SrTiO3 is about 3.32 eV. Similarly, it can also be calculated that the band gaps of Mn-SrTiO3@CF and SrTiO3@CF composites are about 2.91 eV and 3.08 eV, respectively.…”

“…Based on the Kubelka-Munk theory, the band gap (E g ) of semiconductor materials can be calculated according to Equation (1) [38]. As shown in Figure 9b, hν is drawn with (Ahν) 2 , from which it can be obtained that the band gap of single SrTiO 3 is about 3.32 eV.…”

“…However, powder SrTiO 3 photocatalytic material is easy to condense into blocks in use, which reduces the photocatalytic property of SrTiO 3 , and causes some problems such as difficulties in the recycling of catalyst, easy consumption, possible secondary pollution, and so on, limiting its practical application. Therefore, some researchers have begun to think about loading photocatalysts on more suitable carriers [2]. Carbon fiber (CF) has the advantages of a large specific surface area, high specific strength, high flexibility, and strong response to visible light, greatly improving the photocatalytic activity and stability of semiconductor photocatalysts; therefore, it is an ideal carrier for supporting granular semiconductor photocatalysts [3][4][5].…”

Tuning the hybridization and charge polarization in metal nanoparticles dispersed over Schiff base functionalized SBA-15 enhances CO2 capture and conversion to formic acid

“…The notable activity of the Pd based systems compared to the others can be attributed to their hydrogen spill-over ability to the intermediates of the CO 2 to FA process. 45,46 To improve the CO 2 to FA reduction activity further, Pd metal along with other metals as bimetallic catalysts (Pd-Co, Pd-Ni and Pd-Ag) have been impregnated on APTES-GLU-D and their activity tested using similar conditions. The results are summarized in Table S7.…”

1,10-Phenanthroline-based periodic mesoporous organosilica: from its synthesis to its application in the cobalt-catalyzed alkyne hydrosilylation

“…4 In particular, PMOs are promising candidates in catalysis, where they are used as solid ligands to immobilize active metal complexes in the mesopores. 5 While the direct incorporation of pre-formed metal complexes into organosilica frameworks during the synthesis of PMOs has been already reported, 6 PMOs can act as versatile solid ligands by (a) the direct incorporation of a coordination site into the organosilica framework followed by complexation, 7,8 or (b) the post-functionalization of PMOs by grafting a metal complex/a coordination site via the surface silanol groups or functional groups integrated into the organosilica framework. 9…”