柠檬酸镍前驱体热分解制备镍酸镁复氧化物纯相  

Magnesium Nickel Mixed Oxides Prepared from Thermal Decomposition of Citratonickel (Ⅱ) Precusor

作　　者：蒋亚琪[1] 章慧[1] 毛少瑜[1] 周朝晖[1] 万惠霖[1] 

机构地区：[1]厦门大学化学系,厦门361005

出　　处：《无机化学学报》2001年第6期799-803,共5页Chinese Journal of Inorganic Chemistry

基　　金：国家科技部基础研究重点项目(No.G1999022408);创新研究群体计划和教育部骨干教师资助计划资助

摘　　要：以组成和结构确定的柠檬酸配合物Mg2NiHcit2·10H2O和MgNiHcitH2O2·8H2OH4cit为柠檬酸为前驱体热分解得到Ni和Mg摩尔比分别为1∶2和2∶1的镍酸镁纯相Mg2NiO3和MgNi2O3。粉末衍射实验证实它们是由半径相近、价态相等的Ni2+和Mg2+形成的固溶体。Nickel-based oxides are catalysts u sed in the partial oxidation,carbon dioxide reforming of methane and fabrication of carbon nanotubes by thermal decomposition of methane.Complexes Mg2[Ni(Hcit)2]·10H2O and Mg[Ni(H2O)2]2·8H2O(H4cit acid)are prepared from the reaction of MgCl2 with the complexes(NH4)4[Ni (Hcit)2]·2H2O and(NH4)2[Ni(Hcit)(H2O)2]·2H2O respectively.The complexes are decomposed to obtain nickel-based oxides Mg 2NiO3and MgNi2O3.XRD patterns of these new phases are close to the pure phases of MgO and NiO,but the dimensions of the lattice parame ters of these new phases are between t hem.This indicates that the solid-solution is formed due to a very good mutual solubility between MgO and NiO.It is deduced that the preparation of mixed oxides by citrate method is related closely with the decomposition of well-characterized citrate nickel?complexes.

关 键 词：催化剂 热分解 柠檬酸镍 前驱体 镍酸镁 镍复氧化物 柠檬酸法 甲烷 碳纳米管 

分 类 号：TQ426.82[化学工程] TB383[一般工业技术—材料科学与工程]