Studying the chemical, optical and catalytic properties of noble metal (Pt, Pd, Ag, Au)-Cu2O core-shell nanostructures grown via a general approach
Studying the chemical, optical and catalytic properties of noble metal (Pt, Pd, Ag, Au)-Cu2O core-shell nanostructures grown via a general approach
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DOI：
10.1039/c2ta00721e
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发表时间：
2013-01-01
影响因子：
11.9
通讯作者：
Mokari, Taleb
中科院分区：
文献类型：
--
作者：
Meir, Noga;Plante, Ilan Jen-La;Mokari, Taleb
我们研究了金属（Pt，Pd，Ag，Au）-Cu 2 O核壳纳米粒子的化学，光学和催化性能，通过一个简单的和可重复的方法，利用水相反应在室温下生长。我们能够控制Cu 2 O壳的厚度，并研究核的形状和尺寸对混合纳米晶体的结构和性能的影响。我们还研究了混合纳米晶体的光学性质，特别是Cu 2 O壳层厚度对金纳米棒等离子体激元频率的影响。此外，通过测试4-硝基苯酚与NaBH 4的还原反应来检查杂化纳米结构的催化活性。最后，以金属-Cu 2 O杂化纳米结构为模板制备了金属-Cu 2S蛋黄壳结构材料。通过高分辨透射电子显微镜（HRTEM）、能量过滤透射电子显微镜（EFTRM）和X射线衍射（XRD）对四种杂化纳米结构的界面和晶体结构进行了表征。
We studied the chemical, optical and catalytic properties of metal (Pt, Pd, Ag, Au)-Cu2O core-shell nanoparticles grown via a simple and reproducible approach which utilizes aqueous-phase reactions at room temperature. We were able to control the thickness of the Cu2O shell and examine the effect of the core's shape and size on the structure and properties of the hybrid nanocrystals. We also studied the optical properties of the hybrid nanocrystals, in particular the effect of the Cu2O shell thickness on the frequency of the plasmon of gold nanorods. In addition, the catalytic activity of the hybrid nanostructures was examined by testing the reduction reaction of 4-nitrophenol with NaBH4. Finally, the hybrid metal-Cu2O nanostructures were used as templates to form the yolk-shell of metal-Cu2S materials. The interface and the crystalline structures of the four hybrid nanostructures were extensively characterized by high resolution transmission electron microscopy (HRTEM), energy-filtered TEM (EFTRM) and X-ray diffraction (XRD).