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Abstract:
By adopting the strategy of triblock copolymer (Pluronic P123) or cetyltrimethylammonium bromide (CTAB) assisted hydrothermal treatment, we fabricated cubic fluorite-type Ce0.6Zr0.3Y0.1O2 (CZY) solid solution polycrystallites with various morphologies. These materials were characterized by means of techniques such as X-ray diffraction, scanning electron microscopy, transmission electron microscopy, selected-area electron diffraction, X-ray photoelectron spectroscopy, thermogravimetry, laser Raman, Fourier-transfer infrared spectroscopy, hydrogen temperature-programmed reduction, and surface area measurements. It is found that the nanorod-like, microspherical, microbowknot-like, and micro-octahedral CZY particles were respectively generated hydrothermally with CTAB at 120 degrees C for 72 h and with P123 at 100, 120, and 240 degrees C for 48 h after calcination at 550 degrees C for 3 h. There was a copresence of Ce3+ and Ce4+ in the CZY samples that led to the formation of oxygen vacancies. We observed a good correlation of low-temperature reducibility with the morphology of the CZY samples. The reducibility of these nano- and micromaterials at low temperatures (240-550 degrees C) enhanced in the order micro-octahedral CZY < microspherical CZY < microbowknot-like CZY < nanorod-like CZY. The formation mechanism of CZY with various morphologies was discussed.
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INORGANIC CHEMISTRY
ISSN: 0020-1669
Year: 2009
Issue: 5
Volume: 48
Page: 2181-2192
4 . 6 0 0
JCR@2022
ESI Discipline: CHEMISTRY;
JCR Journal Grade:1
CAS Journal Grade:1
Cited Count:
WoS CC Cited Count: 60
SCOPUS Cited Count: 62
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 9
Affiliated Colleges: