Programmed synthesis of Pd@hTiO2 hollow core–shell nanospheres as an efficient and reusable catalyst for the reduction of p-nitrophenol
Programmed synthesis of Pd@hTiO2 hollow core–shell nanospheres as an efficient and reusable catalyst for the reduction of p-nitrophenol
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DOI：
10.1039/c4ra04524f
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发表时间：
2014-07
期刊：
影响因子：
3.9
通讯作者：
Xingchun Zhou;Xiaohang Zhu;Jingwei Huang;Xinzhe Li;P. Fu;Lixin Jiao;Hongfei Huo;Rong Li
中科院分区：
文献类型：
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作者：
Xingchun Zhou;Xiaohang Zhu;Jingwei Huang;Xinzhe Li;P. Fu;Lixin Jiao;Hongfei Huo;Rong Li
在这里，我们报告了一种轻松的合成方法，可以获得PD@HTIO2中空的中孔纳米复合材料，由封装在空心TiO2中壳中的微小PD纳米颗粒核心组成。在液相中，催化反应的PD NP的领先于催化剂。显微镜（TEM），X射线粉末衍射（XRD），X射线光电子光谱（XPS），N2吸附/解吸，元素分析和电感性等离子体的血浆原子发射光谱法（ICP-AES）。在室温下用Nabh4水溶液降低p-introphenol。重复使用八次，没有任何活动损失。
Here, we report a facile synthesis approach to obtain a Pd@hTiO2 hollow mesoporous nanocomposite composed of tiny Pd nanoparticles cores encapsulated within hollow TiO2 mesoporous shells. The core–shell strategy efficiently prevents the aggregation of Pd NPs (Pd nanoparticles) in the high temperature calcination process and the leaching of Pd NPs for the catalytic reaction in a liquid phase. The catalyst was characterized by transmission electron microscopy (TEM), X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), N2 adsorption/desorption, elemental analysis and inductively coupled plasma atomic emission spectrometry (ICP-AES). The synthesized catalyst exhibited high catalytic activity in the reduction of p-nitrophenol with NaBH4 aqueous solution at room temperature. Furthermore, Pd@hTiO2 had an excellent recyclability, evidenced by being extensively reused for eight times without any substantial loss of activity.