Journal
JOURNAL OF MATERIALS SCIENCE
Volume 49, Issue 14, Pages 5056-5065Publisher
SPRINGER
DOI: 10.1007/s10853-014-8212-5
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Funding
- National Natural Science Foundation of China [51003098, 51173170]
- Foundation of State Key Laboratory of Chemical Engineering [SKL-ChE-13A04]
- Foundation of Henan Educational Committee for Key Program of Science and Technology [12A430014, 14A430026]
- Program for New Century Excellent Talents in Universities (NCET)
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Carbon nanotubes (CNTs) functionalized with cyclotriphosphazene-containing polyphosphazenes (PZS) were found to cause the facile immobilization of Au nanoparticles on the surface. The PZS functional layers not only improved the dispersion of CNTs in aqueous solution but also used as a platform for subsequent immobilization of Au nanoparticles. The functionalized CNTs and the Au@PZS@CNTs nanohybrids were characterized by scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, Fourier transform infrared spectrometer, X-ray diffraction, thermogravimetric analysis, Atomic absorption spectrum, and X-ray photoelectron spectroscopy. The results showed that the PZS layers with thickness of about 25 nm were formed uniformly on CNT surfaces by polycondensation between hexachlorocyclotriphosphazene and 4,4'-sulfonyldiphenol, and that high density of homogeneously dispersed spherical Au nanoparticles with average size of 6 nm was immobilized on their outer surface. Meanwhile, the catalytic activity and reusability of the Au@PZS@CNTs nanohybrids were investigated by employing the reduction of 4-nitrophenol into 4-aminophenol by NaBH4 as a model reaction.
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