Ultrafine coppersilicate with MEL structure has been hydrothermally synthesized for the first time under static conditions. By means of XRD, TEM, FTIR, ESR, TG\|DTA and NH 3 TPD the physicochemical property of this no...Ultrafine coppersilicate with MEL structure has been hydrothermally synthesized for the first time under static conditions. By means of XRD, TEM, FTIR, ESR, TG\|DTA and NH 3 TPD the physicochemical property of this novel material was investigated. It was revealed that the as synthesized coppersilicate, which was a uniform, monophase and ultrafine nanomaterial with crystallite size less than 1×10 -8 m , was highly crystalline and thermal stable. Cupric ions were highly dispersed and mainly resided in distorted tetrahedral and square pyramidal environments in the as synthesized as well as the calcined coppersilicates. Incorporation of copper ions into the framework during crystallization also resulted in a weak acidity of this material. [WT5HZ]展开更多
文摘Ultrafine coppersilicate with MEL structure has been hydrothermally synthesized for the first time under static conditions. By means of XRD, TEM, FTIR, ESR, TG\|DTA and NH 3 TPD the physicochemical property of this novel material was investigated. It was revealed that the as synthesized coppersilicate, which was a uniform, monophase and ultrafine nanomaterial with crystallite size less than 1×10 -8 m , was highly crystalline and thermal stable. Cupric ions were highly dispersed and mainly resided in distorted tetrahedral and square pyramidal environments in the as synthesized as well as the calcined coppersilicates. Incorporation of copper ions into the framework during crystallization also resulted in a weak acidity of this material. [WT5HZ]