掺杂氢氧化镍晶相及其结构稳定性与碳酸钠用量的关系研究  

Study on the Relationship between the Crystalline Phose,Strucrture Stability of Droped Nickel Hydroxide and Na_2CO_3

作　　者：赵腾起 朱燕娟[1] 李文华[1] 简修文 罗洁[1] 张伟[1] 张春华[1] 

机构地区：[1]广东工业大学物理与光电工程学院,广东广州510006

出　　处：《广东工业大学学报》2016年第4期56-61,共6页Journal of Guangdong University of Technology

基　　金：国家自然科学基金资助项目(11304045);广东省自然科学基金资助项目(S2012010009955);广州市科技计划资助项目(201607010001);广东工业大学青年基金重点资助项目(15zk0048)

摘　　要：分别用Al-Co、Al-Yb、Yb-Co、Al-Yb-Co复合掺杂,通过调控碳酸钠用量,采用超声波辅助共沉淀法制备了多掺杂α-Ni(OH)2,研究了碳酸钠用量对氢氧化镍的晶相及其结构稳定性的影响.结果表明:碳酸钠对不同掺杂体系的晶相结构影响程度不同;相同掺杂元素下,碳酸钠用量较少时,容易形成α和β相混合结构的氢氧化镍,随着碳酸钠用量的增加,其混合相向纯α相转变,且结构稳定性提高;对Al-Yb-Co掺杂体系,当碳酸钠用量为2.0 g时,其样品在碱液中浸泡30 d后仍为α-Ni(OH)2结构,碳酸钠少于2.0 g的样品在碱液中有不同程度的变相,说明碳酸钠用量对维系α-Ni(OH)2的结构稳定性有很好的作用.The Al-Co, Al-Yb, Yb-Co and Al-Yb-Co multiple doping are respectively used. By control-ling the amount of sodium carbonate, the α-Ni（OH）2 is prepared by ultrasonic-assisted precipitation. And the influence of sodium carbonate on the crystalline phase and structure stability for alpha nickel hy-droxide is studied. The results demonstrate that with the amount increasing, the bi-phase nickel hydrox-ide gradually transforms to pure alpha nickel hydroxideand, the structural stability is also improved. For Al-Yb-Co-Ni（OH）2, when the amount of sodium carbonate is 2. 0 g, the sample still keepsα-Ni（OH）2 30 d after being aged. And when the amount is less than 2. 0 g, the phase transformation exists in the samples with different extent. These results demonstrate that the amount of sodium carbonate is a critical factor in maintaining the structural stability of α-Ni（ OH） 2 .

关 键 词：碳酸钠 氢氧化镍晶相 结构稳定性 复合掺杂 

分 类 号：O646[理学—物理化学] TQ174[理学—化学]