MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China.
Molecules. 2010 Jul 2;15(7):4679-94. doi: 10.3390/molecules15074679.
The preparation of carbon nanotube (CNT)/PdO nanoparticles and graphene oxide (GO)/PdO nanoparticle hybrids via a general aqueous solution strategy is reported. The PdO nanoparticles are generated in situ on the CNTs and GO by a one-step "green" synthetic approach in aqueous Pd(NO(3))(2) solution under ambient conditions without adding any additional chemicals. The production of PdO is confirmed by energy dispersive X-ray spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectroscopy, and thermal gravimetric analysis. The morphologies of the resulting CNT/PdO and GO/PdO nanohybrids are characterized by transmission and/or scanning transmission electron microscopy. PdO nanoparticles with an average size of 2-3 nm in diameter are decorated evenly along the surfaces of CNTs and GO. This synthesis strategy is demonstrated to be compatible for 1) CNTs with different modifications, including pristine, oxidized, and polymer-functionalized CNTs; 2) different types of CNTs, including single-walled carbon nanotubes (SWCNTs), double-walled carbon nanotubes (DWCNTs), and multiwalled carbon nanotubes (MWCNTs); and 3) different shapes of carbon materials, including tubular CNTs and planar GO. The as-prepared CNT/PdO and GO/PdO nanohybrids can be transformed into CNT/Pd and GO/Pd nanohybrids by reduction with NaBH(4), and can then be used as a heterogeneous catalyst in the catalytic reduction of 4-nitrophenol.
通过一种通用的水溶液策略，制备了碳纳米管（CNT）/PdO 纳米粒子和氧化石墨烯（GO）/PdO 纳米粒子杂化物。PdO 纳米粒子通过在环境条件下在 Pd(NO3)2 水溶液中一步“绿色”合成方法原位生成在 CNTs 和 GO 上，而无需添加任何其他化学物质。PdO 的生成通过能量色散 X 射线光谱、X 射线衍射、X 射线光电子能谱、拉曼光谱和热重分析得到证实。所得 CNT/PdO 和 GO/PdO 纳米杂化物的形貌通过透射和/或扫描透射电子显微镜进行了表征。PdO 纳米粒子的平均粒径为 2-3nm，均匀地装饰在 CNTs 和 GO 的表面上。该合成策略被证明适用于 1）具有不同修饰的 CNTs，包括原始、氧化和聚合物功能化的 CNTs；2）不同类型的 CNTs，包括单壁碳纳米管（SWCNTs）、双壁碳纳米管（DWCNTs）和多壁碳纳米管（MWCNTs）；以及 3）不同形状的碳材料，包括管状 CNTs 和平面 GO。通过 NaBH4 还原，制备的 CNT/PdO 和 GO/PdO 纳米杂化物可以转化为 CNT/Pd 和 GO/Pd 纳米杂化物，然后可以用作 4-硝基苯酚催化还原反应中的多相催化剂。
