高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (12): 2151.

• 论文 • 上一篇    下一篇

水热-固相热解法制备不同形貌的四氧化三钴纳米微粉

张卫民, 孙思修, 俞海云, 宋新宇   

  1. 山东大学化学与化工学院, 济南 250100
  • 收稿日期:2002-12-12 出版日期:2003-12-24 发布日期:2003-12-24
  • 通讯作者: 孙思修(1945年出生),男,教授,博士生导师,从事溶剂萃取和无机材料化学研究.E-mail:ssx@sdu.edu.cn E-mail:ssx@sdu.edu.cn

Synthesis of Co3O4Nanopowder with Different Morphologies by Hydrothermal Treatment Followed by Decomposition

ZHANG Wei-Min, SUN Si-Xiu, YU Hai-Yun, SONG Xin-Yu   

  1. School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
  • Received:2002-12-12 Online:2003-12-24 Published:2003-12-24

摘要: 以氨水和氢氧化钾水溶液为沉淀剂,利用沉淀-固相热解法和中压水热-固相热解法,制备了不同形貌的Co3O4纳米微粉.在水热条件下,得到了立方和六角片状的Co3O4微粉,采用XRD和TEM等手段跟踪反应过程并表征产物,在此水热反应体系中影响产物Co3O4形貌的主要因素是pH值和NO3-.

关键词: 水热合成, 四氧化三钴, 纳米材料

Abstract: The powder of Co3O4with a cubic structure and well-developed hexagonal platelets were synthesized hydrothermally, followed by decomposition of the precursors in the Co(NO3)2-NH3or KOH system. The results of XRD and TEM which were used to monitor the processes of hydrothermal treatment and calcination showed that NO3-played a key role in the formation of Co3O4with different morphologies. Co3O4with a cubic structure could be directly prepared hydrothermally from the system with NO3-. After the NO3-was rinsed from the system, a topotactic phenomena was observed. Well-developed hexagonal platelets of β-Co(OH)2were obtained from the hydrothermal system, and then, being baked at 300 ℃ in air, β-Co(OH)2was transformed into Co3O4with the same morphology as the precursor.

Key words: Hydrothermal synthesis, Cobalt oxide, Nano-powder

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