School of Science, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, ShaanXi, People's Republic of China.
Phys Chem Chem Phys. 2013 Jul 14;15(26):10904-13. doi: 10.1039/c3cp50922b. Epub 2013 May 23.
For the first time, a facile, one-pot water/ethanol solution-phase transformation of Cu2(NO3)(OH)3 precursors into bicomponent CuO hierarchical nanoflowers is demonstrated by a sequential in situ dissolution-precipitation formation mechanism. The first stage produces a precursory crystal (monoclinic Cu2(NO3)(OH)3) that is transformed into monoclinic CuO nanoflowers during the following stage. Water is a required reactant, and the morphology-controlled growth of CuO nanostructures can be readily achieved by adjusting the volume ratio between water and ethanol. Such a bicomponent CuO hierarchical nanoflower serving as a promising electrode material for a nonenzymatic glucose biosensor shows higher sensitivity and excellent selectivity. The findings reveal that the different Cu(x)M(y)(OH)(z) (M = acidic radical) precursors synthesized in a water/ethanol reaction environment can be utilized to obtain new forms of CuO nanomaterials, and this unique water-dependent precursor-transformation method may be used to effectively control the growth of other metal oxide nanostructures.
首次通过原位溶解-沉淀形成机制，在水/乙醇溶液相中简便地一锅法将 Cu2(NO3)(OH)3 前体制备成双组分 CuO 分级纳米花。第一阶段生成前驱体晶体（单斜相 Cu2(NO3)(OH)3），随后转化为单斜相 CuO 纳米花。水是必需的反应物，通过调节水和乙醇的体积比可以很容易地实现 CuO 纳米结构的形态控制生长。这种双组分 CuO 分级纳米花作为一种有前途的非酶葡萄糖生物传感器电极材料，具有更高的灵敏度和优异的选择性。研究结果表明，在水/乙醇反应环境中合成的不同 Cu(x)M(y)(OH)(z)（M = 酸性基团）前体可用于获得新型的 CuO 纳米材料，这种独特的依赖于水的前体转化方法可能用于有效地控制其他金属氧化物纳米结构的生长。
