| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1521500 | Materials Chemistry and Physics | 2015 | 6 Pages |
•Novel Sn containing cubic mesoporous silicate, Sn-KIT-5, prepared for the first time.•Four and hexa coordinated Sn species were observed even at lower Sn loadings.•At higher Sn loading, uniform agglomerates of SnOx particles were observed.•Sn-KIT-5 also showed majorly Lewis acid sites stemming from Sn4+ incorporation.
Sn containing ordered mesoporous silicate with cage type Fm3m cubic structure, Sn-KIT-5, with varying Si/Sn ratio was successfully synthesized by using Pluronic F127 triblock copolymer as a structure directing agent. Successful incorporation of Sn was achieved without any pH adjustments. The synthesized samples were methodically characterized by suitable analytical techniques. Based on the loading of Sn, isolated Sn4+ species and SnO2 particles were confirmed by angle XRD, Diffuse Reflectance UV–vis and XPS studies. The N2 sorption studies revealed specific surface area of 1034–807 m2/g, total pore volume of 0.68–0.42 cm3/g and cage diameter (pore size) of 8.9–9.4 nm. Further, Sn-KIT-5 possessed majorly Lewis acidic sites with total acidity of 73–139 μmol/g were confirmed from the Pyridine adsorbed FTIR and NH3 desorbed TPD methods. Finally, this synthesis of mesoporous Sn-KIT-5 with above mentioned properties will open new applications for catalysis.
