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AuPd Bimetallic Nanocrystals Embedded in Magnetic Halloysite Nanotubes: Facile Synthesis and Catalytic Reduction of Nitroaromatic Compounds

In this research, a facile and effective approach was developed for the preparation of well-designed AuPd alloyed catalysts supported on magnetic halloysite nanotubes (HNTs@Fe(3)O(4)@AuPd). The microstructure and the magnetic properties of HNTs@Fe(3)O(4)@AuPd were confirmed by transmission electron...

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Detalles Bibliográficos
Autores principales: Jia, Lei, Zhou, Tao, Xu, Jun, Li, Fenghai, Xu, Zhouqing, Zhang, Beibei, Guo, Shengli, Shen, Xiaoke, Zhang, Wensheng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5666498/
https://www.ncbi.nlm.nih.gov/pubmed/29039761
http://dx.doi.org/10.3390/nano7100333
Descripción
Sumario:In this research, a facile and effective approach was developed for the preparation of well-designed AuPd alloyed catalysts supported on magnetic halloysite nanotubes (HNTs@Fe(3)O(4)@AuPd). The microstructure and the magnetic properties of HNTs@Fe(3)O(4)@AuPd were confirmed by transmission electron microscopy (TEM), high resolution TEM (HRTEM), energy-dispersive X-ray spectroscopy (EDS), and vibrating sample magnetometry (VSM) analyses. The catalysts, fabricated by a cheap, environmentally friendly, and simple surfactant-free formation process, exhibited high activities during the reduction of 4-nitrophenol and various other nitroaromatic compounds. Moreover, the catalytic activities of the HNTs@Fe(3)O(4)@AuPd nanocatalysts were tunable via adjusting the atomic ratio of AuPd during the synthesis. As compared with the monometallic nanocatalysts (HNTs@Fe(3)O(4)@Au and HNTs@Fe(3)O(4)@Pd), the bimetallic alloyed HNTs@Fe(3)O(4)@AuPd nanocatalysts exhibited excellent catalytic activities toward the reduction of 4-nitrophenol (4-NP) to 4-aminophenol. Furthermore, the as-obtained HNTs@Fe(3)O(4)@AuPd can be recycled several times, while retaining its functionality due to the stability and magnetic separation property.