Synthesis,characterization,and catalytic activities of mesostructured titanosilicates assembled from quaternary alkylammonium with preformed titanosilicate precursors under alkaline and acidic conditions

摘要

Mesostructured titanosilicates(JQW-3 and JQW-4)have been successfully hydrothermally synthesized from assembly of titanosilicate precursors with quaternary alkylammonium surfactants under alkaline and acidic conditions.Mesoporous JQW-3 and JQW-4 show highly hydro thermal stability in boiling water(over l00h)as compared with that of conventional Ti-MCM-41.The catalytic results show that JQW-3 and JQW-4 are very active in a series oxidations and the catalytic activity is similar to that of TS-1,and higher than that of Ti-MCM-41.