期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 1, 期 20, 页码 6169-6174出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ta10823f
关键词
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资金
- National Institute of Science and Technology for Environmental Studies (INCT-EMA)
- Brazilian Research Council (CNPq)
- State of Sao Paulo Research Foundation (FAPESP)
- Center for Environmental Research and Training (CEPEMA-USP)
Monodisperse carbon microspheres surrounded by CeO2 nanoparticles were prepared by a one-pot green hydrothermal method. The hybrid microspheres were synthesized using a mixed D(+)-glucose and Ce(NO3)(3) aqueous solution with subsequent hydrothermal treatment at 160 degrees C for 12 h. The as-prepared material was characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FEG-SEM), transmission electron microscopy (TEM) and Fourier transform infrared (FT-IR) spectroscopy. The results showed that microsphere growth is catalyzed by Ce3+ ions, for the same hydrothermal treatment period the diameters of hybrid microspheres were 5 mu m, 25 times higher than for pure carbon spheres. These hybrid materials exhibited excellent catalytic activity in salicylic acid (SA) degradation by ozone. Ozonation studies showed when the CS20Ce microsphere was used as a catalyst, the mineralization rate of AS reached 80% after 60 minutes of treatment. Cerium oxide-carbon microspheres catalytic activity was attributed to the synergic effect of the carbon and CeO2 interface structures that were capable of enhancing radical species generation in the ozonation process.
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