Thermal behaviour of γ-titanium phosphate-phenanthroline intercalation compound exchanged with silver and other transition metal ions☆

摘要: The layered composite γ-TiPO4(H2PO4)phen0.48·1.5H2O (phen = 1,10-phenanthroline) is able to exchange transition metal ions give new intercalation compounds. uptake of divalent cobalt, nickel and copper gives materials with interlayer distances unchanged in respect the precursor, while silver two compounds are obtained spacing increased by about 3 A. also Co(II), Ni(II) Cu(II) bimetallic thus obtained. All phases submitted TG-DTA experiments show specific behaviour depending on nature amount ion present solids. Silver has a catalytic effect phenanthroline elimination temperature, since process more pronounced higher content. During cobalt undergo redox metallic solids as prepared. Ag0 no longer observable when heated above 500°C, gain weight detected TG curves, probably due Ag2O formation. presumably occurs NiAg derivatives since, for CoAg analogues, dark-grey coloured. After phen, thermal treatment leads formation AgTi2(PO4)3, metal-titanium double phosphates pyrophosphates, processes always accompanied exothermic effects DTA curves.