Nanosized fibrous cerium phosphates, Ce (HPO4)2.2.9H2O (nCePf), wa prepared. was characterized by chemical , XRD, TGA analysis, Scanning electron microscope (SEM) and transmission electron microscope (TEM). Novel supported polybenzimidazole/ fibrous cerium phosphate nanocomposite membrane was prepared via in-situ chemical oxidation of the monomer that was promoted by the reduction of Ce (iv) ions present in the inorganic matrix. The presence of Ce (iv) ions allows redox reactions necessary to oxidative polymerization to occur. The resultant material was characterized by XRD, TGA, elemental (C,H,N) analysis and by FT-IR spectroscopy. Image SEM of the resulting nanocomposite reveals a uniform distribution of the polymer on the inorganic matrix }. Amount of polymer present in the composites found to be 11%.

Novel nanosized lamellar germanium phosphate, α-Ge (HPO4)2.1.84H2O(nGeP), with interlayer spacing (d001) = 7.71Ǻ, was prepared. Preparations of polystyrene/lamellar germanium phosphate nanocomposite membranes were carried out by mixing slurry tetrahydrofuran (THF) solution of (nGeP) , of different weight percentages (2.5, 5 and 15 wt %), with (THF) solution of 5% polystyrene (PS) in concentration at 45°C with stirring for 48 hours. The resultant mixtures were poured into flat surface containers, of desired thickness, respectively, and allowed to dry in air. The resulting fully dried composites were pealed from the glass containers. The composite membranes were transparent flexible thin films and were characterized by XRD, TGA, FT-IR, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Size particles of lamellar germanium phosphate calculated from XRD broadening method using the Scherrer,s equation, found to be 44.6 nm . TEM images of nanocomposites show that the (nGeP) in the nanometer scale, in the range 38-53 nm. The composite materials show to have mechanical and thermal stability properties superior to that of the original polymer, which a result of the enhancement of the thermal properties of PS/nGeP nanocomposites. The exchange capacities of the resultant composite membranes were investigated.