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| 1 | Synthesis of Ag@Cu_2O core-shell metal-semiconductor nanoparticles and conversion to Ag@Cu core-shell bimetallic nanoparticles显示文摘Ag@Cu2O core-shell metal-semiconductor nanoparticles(NPs) were prepared by using solution phase strategy. It was found that Ag@Cu2O core-shell NPs were easily converted to Ag@Cu bimetallic core-shell NPs with the help of surfactant PVP and excessive reducer ascorbic acid in air at room temperature, which is a unique phenomenon. Varying volumes of Ag colloidal solutions were added into the reaction mixtures containing fixed initial concentrations of Cu2+ and PVP, Ag@Cu2O and Ag@Cu core-shell NPs with fixed core size but varying outer shell thicknesses could be obtained. The composites, structures, morphologies and extinction properties of Ag@Cu2O and Ag@Cu core-shell NPs were systematically characterized by XRD, TEM and extinction spectra. Both of these NPs show wide tunable optical properties. The extinction peaks could be shifted from 421 nm to 700 nm. FTIR results reveal that Cu+ ions on the surface of Cu2 O nanocrystalline coordinate with N and O atoms in PVP and further are reduced to metallic Cu by excessive ascorbic acid and then form a nucleation site on the surface of Cu2 O nanocrystalline. PVP binds onto a different site to proceed with the reduction until all the Cu sources in Cu2 O NPs are completely assumed. And the shell of Cu2 O is converted to Cu shell. The synthesis approach in this paper is simple and also a promising reference for synthesizing other core-shell NPs. Ag@Cu2O NPs can be easily converted to Ag@Cu NPs in air at room temperature, which is promising to be used in electronic devices. | YANG AiLing LI ShunPin WANG YuJin WANG LeLe BAO XiChang YANG RenQiang | 2015 | Science China(Technological Sciences)2015，58，5： | 1 |
| 2 | 溶液中制备Cu_2O@Cu_2O核壳纳米颗粒及其向Cu_2O@Cu核壳纳米颗粒的转化(英文)显示文摘在溶液中制备Cu_2O@Cu_2O核壳结构纳米颗粒。在表面活性剂聚乙烯吡咯烷酮(PVP)和过量还原剂抗环血酸(AA)作用下,发现Cu_2O@Cu_2O纳米颗粒在室温下易转化为Cu_2O@Cu纳米颗粒的有趣现象。采用XRD、TEM、消光谱表征纳米颗粒的组分、结构、形貌及消光特性。不同壳厚的Cu_2O@Cu纳米颗粒由于金属表面等离子体表现出光学调谐特性,但Cu_2O@Cu_2O纳米颗粒没有此特性。FTIR结果表明,Cu_2O壳表面的Cu^+与PVP中的N及O结合,进一步被过量的AA还原成Cu并在Cu_2O纳晶表面成核。随着还原的进行,PVP与Cu结合直到Cu_2O壳中所有Cu源消耗殆尽。 | 杨爱玲 李顺嫔 王玉金 王乐乐 包西昌 杨仁强 | 2015 | Transactions of Nonferrous Metals Society of China2015，25，11： | 1 |
| 3 | 空心氧化亚铜纳米颗粒吸附甲基橙性能研究显示文摘摘要:如何有效地去除污水中的有机染料是人们一直关注的问题。本文通过两步法合成了Cu2O纳米颗粒,TEM分析显示,纳米颗粒为中空的球壳结构,直径大小约200nm。我们用空心Cu2O纳米材料与不同浓度的甲基橙(MO)溶液混合,在黑暗的环境下吸附150min左右,以观测其对甲基橙分子的吸附能力。实验结果表明,空心Cu2O纳米颗粒对MO分子的吸附符合准二级吸附动力学模型。0.7g/L的空心Cu2O纳米颗粒与80mg/L的Mo溶液在30min时就已经达到饱和.吸附率高达99.7%。其吸附等温线符合Freundlich吸附等温线模型。 | 代志旷 杨爱玲 王乐乐 张戈辉 包西昌 | 2016 | 纳米科技2016，15，1： | 0 |
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