Direct Hydrothermal Synthesis of Highly Ordered Sn-SBA-15 Mesoporous Materials
Well-ordered Sn<SUP>4+</SUP>-incorporated mesoporous silica SBA-15 samples have been synthesized from tetraethyl orthosilicate (TEOS) and SnCl<SUB>4</SUB> (Si/Sn = 114–15) using nonionic surfactants under a slightly higher pH medium (optimum H<SUB>2</SUB>O to HCl molar ratio) and characterized by XRD (an increase in lattice parameter), TEM (no SnO<SUB>2</SUB> species) and UV–vis spectral (absorption at 211 nm) techniques to show that Sn<SUP>4+</SUP> ions are in tetrahedral coordination in Sn–SBA-15.
- Chemistry letters
Chemistry letters 35(8), 860-861, 2006-08-05
The Chemical Society of Japan