Tetravalent metal phosphates chemistry recently has attracted attention in order to obtain materials with wide range of applications. Crystalline α-zirconium titanium phosphates, α-ZrxTi(1-x) (HPO4)2. H2O, (x= 0.9, 0.8) were synthesized from refluxing of their parent amorphous materials in 10M H3PO4.
Novel pillared materials:
α-Zr0.9Ti0.1(H)1.7(PO4)2(Phen)0.14(Co)0.15 .0.41H2O ,
α-Zr0.9Ti0.1(H)1.76(PO4)2( Phen Cu)0.12 .1.22H2O,
α-Zr0.8Ti0.2(H)1.64(PO4)2(Phen)0.18 (Co)0.15.1.1H2O and
α-Zr0.8Ti0.2(H)1.6(PO4)2(Phen)0.13(Cu)0.20.1.1H2O ,
These were prepared from reactions of 0.1M CoCl2.6H2O (or 0.1M CuCl2.2H2O) in ethanol:H2O solution (1:1), with α-ZrxTi(1-x)(HPO4)2.H2O, followed by addition of 0.1M 1,10-phenanthroline in ethanol. The resultant novel pillared materials were characterized by chemical, X-ray diffraction, thermal analysis and FT-IR. Metal ions contents were determined by atomic absorption spectroscopy. The thermal decomposition of the pillared materials found to occur mainly in three stages, loss of water of hydration up to~ 200°C, followed by decomposition of organic ligand and POH groups condensation up to 800 °C. The final products were [ZrxTi(1-x)]P2O7 + (MO)y, where M = Co2+ or Cu2+ ions, y = M loading, respectively. Comparative studies on thermal decomposition of 1,10-phenantroline-α-ZrxTi(1-x)(HPO4)2.nH2O, show their thermal decomposition occurs in three stages loss of water of hydration up to ~180°C, followed by decomposition of organic ligand and POH groups condensation up to 700 °C. The pillared materials shows the increase of their thermal stability which can be related to metal ions effect. Here we are reporting synthesis and characterization of novel pillars of α-zirconium-titanium phosphates- 1,10-phenanthroline Co(II) and Cu(II) materials.