用CuCl2为铜源高效制备形貌可控CuGeO3的研究  

Efficient Preparation of CuGeO3 with Controllable Morphology Using CuCl2 as Copper Source

作　　者：肖昱旻 李彬[1] 覃礼钊[1] 林华[1] 李庆[1] 廖斌[2] XIAO Yumin;LI Bin;QIN Lizhao;LIN Hua;LI Qing;LIAO Bin(Faculty of Materials&Energy,Southwest University,Chongqing 400715,China;College of Nuclear Science and Technology,Beijing Normal University,Beijing 100875,China)

机构地区：[1]西南大学材料与能源学院,重庆400715 [2]北京师范大学核科学与技术学院,北京100875

出　　处：《无机材料学报》2021年第1期69-74,共6页Journal of Inorganic Materials

基　　金：中央高校基础研究经费(XDJK2019D004);广东省重点领域研发计划(2019B090909002);国家自然科学基金联合基金重点项目(U1865206);国防科技重点实验室基金(614220207011802)。

摘　　要：锗酸铜因具有自旋佩尔斯效应以及优异的储锂性能而受到广泛关注,普遍采用水热法制备锗酸铜。在制备过程中,利用Cu(CH3COO)2等弱酸盐促进水的电离来获取CuGeO3生长所需的OH–,这种操作方法虽然简单,但制备时间长、效率低。本研究采用强酸盐CuCl2取代弱酸盐Cu(CH3COO)2为铜源,调节前驱体溶液的pH,控制各晶面吸附能力及溶液过饱和度,实现高效制备CuGeO3纳米棒和CuGeO3六边形纳米片,将制备时间缩短至8 h。并在此基础上,添加一维结构导向剂乙二胺,在加速反应过程的同时限制CuGeO3的二维平面生长,高效制备了100 nm、200~300 nm、350~500 nm、400~700 nm、1~2μm和1~3μm六种不同尺寸、形貌均一的CuGeO3纳米线。Copper germanate has attracted wide attention because of its spin-Peierls transition and excellent lithium storage performance.Typical hydrothermal method uses weak acid salts such as Cu(CH3COO)2 to promote the ionization of water to obtain OH–required for the growth of CuGeO3.Although the operation is facile,the reaction time is long and the efficiency is low.In this work,CuCl2 was used as the copper source instead of Cu(CH3COO)2 and the pH of precursor solution was adjusted to control the adsorption capacity of each crystal plane and the supersaturation of the solution,so as to achieve efficient preparation of CuGeO3 nanorods and CuGeO3 hexagonal nanosheets,effectively shortening the reaction time to 8 h.Based on this,one-dimensional structure-directing agent ethylenediamine was added to accelerate the reaction process while limiting the two-dimensional planar growth of CuGeO3,and six different sizes(100 nm,200-300 nm,350-500 nm,400-700 nm,1-2μm and 1-3μm)of uniform CuGeO3 nanowires were efficiently prepared.

关 键 词：CuGeO3纳米线 CUCL2 水热法 形貌控制 

分 类 号：TB34[一般工业技术—材料科学与工程]