一种在水中制备碳纳米管和氧化石墨烯负载 PdO 纳米粒子的通用策略。

A general strategy for the preparation of carbon nanotubes and graphene oxide decorated with PdO nanoparticles in water.

机构信息

MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, China.

出版信息

Molecules. 2010 Jul 2;15(7):4679-94. doi: 10.3390/molecules15074679.

DOI:10.3390/molecules15074679

PMID:20657385

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6257560/

Abstract

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.

摘要

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。