水热-固相热解法制备不同形貌的四氧化三钴纳米微粉  

Synthesis of Co_3O_4 Nanopowder with Different Morphologies by Hydrothermal Treatment Followed by Decomposition

作　　者：张卫民[1] 孙思修[1] 俞海云[1] 宋新宇[1] 

机构地区：[1]山东大学化学与化工学院,济南250100

出　　处：《高等学校化学学报》2003年第12期2151-2154,共4页Chemical Journal of Chinese Universities

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 Co3 O4纳米微粉 .在水热条件下 ,得到了立方和六角片状的 Co3 O4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 Co3 O4形貌的主要因素是 p H值和 NO-3 .The powder of Co 3O 4 with a cubic structure and well-developed hexagonal platelets were synthesized hydrothermally, followed by decomposition of the precursors in the Co(NO 3) 2-NH 3 or KOH system. The results of XRD and TEM which were used to monitor the processes of hydrothermal treatment and calcination showed that NO - 3 played a key role in the formation of Co 3O 4 with different morphologies. Co 3O 4 with a cubic structure could be directly prepared hydrothermally from the system with NO - 3. After the NO - 3 was rinsed from the system, a topotactic phenomena was observed. Well-developed hexagonal platelets of β-Co(OH) 2 were obtained from the hydrothermal system, and then, being baked at 300 ℃ in air, β-Co(OH) 2 was transformed into Co 3O 4 with the same morphology as the precursor.

关 键 词：水热-固相热解法 制备 四氧化三钴 纳米微粉 Co2O4 表征 纳米材料 

分 类 号：O614.812[理学—无机化学] TB383[理学—化学]