Formation of Cupric Tungstate (Ⅵ) dihydrate Via Hydrothermal Reaction Between Copper Nitrate and Sodium Tungstate

摘要：

　　Copper nitrate and sodium tungstate were employed to prepare the CuWO4-2H2O pow der by hydrothermal method.Morphological and microstructural investigations of precursors and pre cipitates were carried out using high resolution transmission dectron microscopy (HRTEM) and X-ray diffractometer (XRD), respectively.The forming process of Cu2 WO4 (OH)2 precursors in the mixed solution were discussed.The formation mech anism of CuWO4 2H2O during the process of hydro thermal reaction were established.During the hy drothermal reaction precursors Cu2WO4(OH)2 was surrounded by WO42-ions.WO24-ions adsorbed and diffused on the surface of Cu2WO4(OH) 2 in the phe nomena of high pressure and temperature, by dehy dration and molecular rearrangement, CuWO4.2H20 were heterogeneous nucleation here.WO24-i ons reacted with CU2WO4 (OH)2 through CuWO42H2O layer until WO42-ions have been depleted.The formation of CuWO4.2H2O followed in situ crystallization mechanism in the process of hydro thermal reaction.

关键词： CuWO4-2H20 powder nano composite structural HRTEM hydrothermal method

作者: Douqin Ma Jingpei Xie Jiwen Li Aiqin Wang Wenyan Wang Luoli Li Haoliang Sun Shu Liu Fengmei Wang

作者单位: School of Physical Engineering,Zhengzhou University,Zhengzhou,Henan,450001,China School of Material Science and Engineering,Henan University of Science and Technology,Luoyang,Henan,

会议类型: 国际会议

会议名称: The 12th China-Russia Symposium on Advanced Materials and Technologies(第十二届中俄双边新材料新工艺国际会议)

会议地点: 昆明

会议语种:英文

页码: 79-82

在线出版日期: 2013-11-19（万方平台首次上网日期，不代表论文的发表时间）