One-pot synthesis of SO_4~(2-)/Zr-PHTS via hydrothermal method and their catalytic behavior

Mesoporous sulfated Zr-PHTS(SO42-/Zr-PHTS)solid acid was prepared by using P123(EO20 PO70EO20)as a structure directing agent via the one-pot hydrothermal process in lower concentration sulfuric acid solution.These prepared samples were characterized by powder X-ray diffraction(XRD),TEM,N2sorption isotherms,Py-FTIR spectra,and NH3-TPD.The characterization results showed that the obtained samples possessed well-ordered hexagonal mesostructure,and all the samples had weak and medium acidity dominated by Lewis acid sites according to the analysis of pyridine adsorption and NH3TPD.With the increase of Si/Zr molar ratio,specific surface areas relatively little varied and acidity was obviously reduced,but pore volume and pore diameter were not severely affected.In addition,the SO42-/ Zr-PHTS catalyst showed good performance in the THF polymerization reaction,and such result could be related to the mesoporous structure and surface acidity.