Chen Qingde, Shen Xinghai, Gao Hongcheng
Beijing National Laboratory for Molecular Sciences, Department of Applied Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People's Republic of China.
J Colloid Interface Sci. 2007 Aug 15;312(2):272-8. doi: 10.1016/j.jcis.2007.03.036. Epub 2007 May 3.
A local ordered structure constructed from solid Cu(2)O nanocubes was obtained by the radiolytic reduction of Cu(NO(3))(2) in a water-in-oil (W/O) microemulsion composed of Triton X-100, n-hexanol, cyclohexane, and water in the presence of ethylene glycol (EG). However, when Triton X-100 was replaced with Brij 56 in the microemulsion, hollow Cu(2)O nanocubes were synthesized. The addition of toluene into the Brij 56 system could decrease the ratio of hollow nanocubes. It was suggested that the balance between the reduction rate of Cu(2+) depending on the yield of hydrated electrons (e(aq)(-)) and the escape rate of the mixed solvent determined their final morphologies. The presence of EG influenced the rigidity of the interface of the microemulsion and thus the above balance, which resulted in the different morphologies of Cu(2)O nanoparticles in the Brij 56-based microemulsion.
在由Triton X-100、正己醇、环己烷和水组成的油包水（W/O）微乳液中，在乙二醇（EG）存在下，通过辐射还原Cu(NO₃)₂，获得了由固态Cu₂O纳米立方体构建的局部有序结构。然而，当在微乳液中用Brij 56替代Triton X-100时，合成了中空的Cu₂O纳米立方体。向Brij 56体系中加入甲苯可降低中空纳米立方体的比例。据推测，取决于水合电子（e(aq)(-)）产率的Cu²⁺还原速率与混合溶剂的逸出速率之间的平衡决定了它们的最终形态。EG的存在影响了微乳液界面的刚性，进而影响了上述平衡，这导致了基于Brij 56的微乳液中Cu₂O纳米颗粒的不同形态。
