无机材料学报, 2021, 36 (1): 69, 网络出版: 2021-01-21
用CuCl2为铜源高效制备形貌可控CuGeO3的研究
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、1~2 μm和 1~3 μm六种不同尺寸、形貌均一的CuGeO3纳米线。
Abstract
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, 1-2 μm and 1-3 μm) of uniform CuGeO3 nanowires were efficiently prepared.
肖昱旻, 李彬, 覃礼钊, 林华, 李庆, 廖斌. 用CuCl2为铜源高效制备形貌可控CuGeO3的研究[J]. 无机材料学报, 2021, 36(1): 69. Yumin XIAO, Bin Li, Lizhao QIN, Hua LIN, Qing LI, Bin LIAO.