Synthesis and physicochemical properties of ultrafine coppersilicate with MEL structure

Ultrafine coppersilicate with MEL structure has been hydrothermally synthes ized for the first time under static conditions, By means of XRD, TEM, FTIR , ESR, TG-DTA and NH3-TPD the physicochemical property of this novel materi al was investigated, It was revealed that the as-synthesized coppersilicate , which was a uniform, monophase and ultrafine nanomaterial with crystallit e size less than 1 X 10(-8) m, was highly crystalline and thermal stable. C upric ions were highly dispersed and mainly resided in distorted tetrahedra l and square pyramidal environments in the as-synthesized as well as the ca lcined coppersilicates. Incorporation of copper ions into the framework dur ing crystallization also resulted in a weak acidity of this material.