Nano-sized mesoporous phosphated tin oxide as an efficient solid acid catalyst.

ABSTRACT: Herein, we prepared a mesoporous tin oxide catalyst (mSnO₂) activated with phosphate species by the adsorption of phosphate ions from a phosphoric acid solution onto tin oxyhydroxide (Sn(OH)₄) surface. The phosphate content ranged from 3 to 45 wt%. The nonaqueous titration of n-butylamine in acetonitrile was used to determine the total surface acidity level. FTIR of chemically adsorbed pyridine was used to differentiate between the Lewis and Brönsted acid sites. Thermal and X-ray diffraction analysis indicated that the addition of phosphate groups stabilized the mesostructure of mSnO₂ and enabled it to keep its crystalline size at the nanoscale. FTIR analysis indicated the polymerization of the HPO₄ ^2- groups into P₂O

SUBMITTER: Hassan SM 

PROVIDER: S-EPMC9059524 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature