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Fabrication and characterization of double‐shelled CeO 2 ‐La 2 O 3 /Au/Fe 3 O 4 hollow architecture as a recyclable and highly thermal stability nanocatalyst
Author(s) -
Huang Mengqiu,
Fang Jiasheng,
Zhang Yiwei,
Zhang Chao,
Zhou Yuming,
Zhao Shuo,
Gao Yan,
Sheng Xiaoli
Publication year - 2018
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.4201
Subject(s) - thermal stability , oxide , catalysis , chemical engineering , fabrication , chemistry , x ray photoelectron spectroscopy , nanoparticle , thermal treatment , nanotechnology , layer (electronics) , materials science , composite material , organic chemistry , medicine , alternative medicine , pathology , engineering
A novel magnetic binary‐metal‐oxide‐coated nanocataly composing of a hollow Fe 3 O 4 core and CeO 2 ‐La 2 O 3 shells with Au nanoparticles encapsulated has been created in this work. The structural features of catalysts were characterized by several techniques, including SEM, TEM, UV‐vis, FTIR, XRD, XPS and TGA analyses. After the coating of CeO 2 ‐La 2 O 3 layer, CeO 2 ‐La 2 O 3 /Au/C/Fe 3 O 4 microspheres showed a superior thermal stability and catalytic reactivity compared with a pure CeO 2 or La 2 O 3 layer. Accompanied by the burning of carbon layer, the specific surface could be increased by the formation of double‐shelled structure. Besides, the desired samples could be separated by magnet, implying the superior recycle performance. Using the reduction of 4‐nitrophenol by NaBH 4 as a model reaction, the microspheres exhibited highly reusability, superior catalytic activity, thermal stability, which are attributed to the unique double‐shelled structure of the support, uniform distribution of Au nanoparticles, the highly thermal stability of CeO 2 ‐La 2 O 3 layer and mixed oxide synergistic effect. As a consequence, the unique nanocatalyst will open a promising way in the fabrication of the double‐shelled hollow binary‐metal‐oxide materials for future research and has great potential in other applications.