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以硝酸铜、钼酸钠及氢氧化钠为原料,采用简单的水相沉淀法,在60℃下合成出钼铜矿(Cu3(MoO4)2(OH)2).通过X射线衍射、扫描电镜、透射电镜、热重与差热分析、红外光谱及荧光光谱等测试手段对材料的微观结构、形貌、热稳定性及谱学特性进行表征分析.结果显示,制备的产物为结晶性良好的、至少一维是纳米的片状结构材料,属于单斜型(晶胞参数a=0.53863 nm,b=1.40006 nm,c=0.56003 nm),其元素摩尔含量比约为3:2:10,与推测的分子式完全吻合.热重与差热分析数据表明Cu3(MoO4)2(OH)2纳米晶具有很好的热稳定性且起始分解温度为320℃.通过软件测得的d(021)面与d(ī21)面的晶间面距分别为0.435 nm与0.358 nm,与理论值基本相符.经测量,Cu3(MoO4)2(OH)2纳米晶具有强的荧光性质,在激发波长369 nm的作用下在530 nm表现为强发射峰.此外,还探讨了Cu3(MoO4)2(OH)2纳米晶的形成机理.
Cu (MoO4) 2 (OH) 2) was synthesized from copper nitrate, sodium molybdate and sodium hydroxide using simple aqueous precipitation at 60 ℃. The structure of Cu3 (MoO4) 2 , Transmission electron microscopy, thermogravimetry and differential thermal analysis, infrared spectroscopy and fluorescence spectroscopy were used to characterize the microstructure, morphology, thermal stability and spectroscopic properties of the material.The results showed that the prepared product was of good crystallinity , At least one dimension is nano-sheet material, which belongs to the monoclinic type (unit cell parameters a = 0.53863 nm, b = 1.40006 nm, c = 0.56003 nm) and has an element molar content ratio of about 3: 2: The results of thermogravimetric analysis and differential thermal analysis show that Cu3 (MoO4) 2 (OH) 2 nanocrystals have good thermal stability with an initial decomposition temperature of 320 ° C. The d (021) The interfacial distance between the d (ī21) plane and the d (ī21) plane is 0.435 nm and 0.358 nm, respectively, which is in good agreement with the theoretical value.The Cu3 (MoO4) 2 (OH) 2 nanocrystals exhibit strong fluorescence at 369 excitation wavelength nm and a strong emission peak at 530 nm.In addition, the formation mechanism of Cu3 (MoO4) 2 (OH) 2 nanocrystals was also discussed.