Montmorillonite supported titanium(Ti-MMT) or antimony catalyst(Sb-MMT) has been a hot area of research on preparing polyethylene terephthalate/montmorillonite(PET/MMT) nanocomposites by in situ polymerization. So removal of Ti or Sb from Ti-MMT or Sb-MMT is not expected during in situ polymerization. Studies on immobilization of Ti or Sb on Ti-MMT or Sb-MMT are seldom reported. In this work, a series of montmorillonite supported catalysts of titanium(Ti-MMT) or antimony(Sb-MMT) and cointercalated montmorillonite of titanium and antimony(Ti/Sb-MMT) were prepared by(1) the reaction of sodium bentonite suspension with intercalating solution containing titanium tetrachloride and/or antimony chloride, and(2) drying or calcinating the products at different temperature(100, 150, 240, 350 and 450 ℃). The physicochemical properties of these MMT supported catalysts were studied by X-ray diffraction(XRD), fourier transform infrared spectroscopy(FT-IR), inductively coupled plasma optical emission spectrometer(ICPOES), N 2 adsorption/desorption isotherms, UV-visible diffuse reflectance spectroscopy(UV-vis) and transmission electron microscopy(TEM). The immobile character of Ti or Sb on MMT supported catalysts was evaluated by a two-step method in deionized water or ethylene glycol. Several results were obtained, i e,(a) during the preparation, with an increase in drying or calcinating temperature, the amount of titanium and/or antimony species remained on these MMT supported catalysts decreased,(b) the experiments about immobile character of Ti or/and Sb showed that with an increase in drying or calcinating temperature, the immobilization of Ti and/or Sb species remained on these MMT supported catalysts increased gradually,(c) Ti-MMT calcinated at 450 ℃ had the biggest pore volume, which means Ti-MMT had the best adsorption application prospect. Montmorillonite supported titanium (Ti-MMT) or antimony catalyst (Sb-MMT) has been a hot area of ​​research on preparing polyethylene terephthalate / monmormorite (PET / MMT) nanocomposites by in situ polymerization. or Sb-MMT is not expected during in situ polymerization. Studies on immobilization of Ti or Sb on Ti-MMT or Sb-MMT are seldom reported. In this work, a series of montmorillonite supported catalysts of titanium (Ti-MMT) or antimony (Sb-MMT) and cointercalated montmorillonite of titanium and antimony (Ti / Sb-MMT) were prepared by (1) the reaction of sodium bentonite suspension with intercalating solution containing titanium tetrachloride and / or antimony chloride, and the products at different temperatures (100, 150, 240, 350 and 450 ° C.) The physicochemical properties of these MMT supported catalysts were studied by X-ray diffraction (XRD), fourier transform infrared spectroscopy optical emissi on-ion spectrometer (ICPOES), N 2 adsorption / desorption isotherms, UV-visible diffuse reflectance spectroscopy (UV-vis) and transmission electron microscopy (TEM). The immobile character of Ti or Sb on MMT supported catalysts was evaluated by a two-step several results were obtained, ie, (a) during the preparation, with an increase in drying or calcinating temperature, the amount of titanium and / or antimony species remained on these MMT supported catalysts decreased, (b ) the experiments about immobile character of Ti or / and Sb showed that with an increase in drying or calcinating temperature, the immobilization of Ti and / or Sb species remained on these MMT supported catalysts increased gradually, (c) Ti-MMT calcinated at 450 ° C had the biggest pore volume, which means Ti-MMT had the best adsorption application prospect.