期刊
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
卷 81, 期 -, 页码 99-107出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2019.08.058
关键词
Nickel oxide; Metal-doped mesoporous silica material; Microsphere; Superparamagnetism; Nanostructure
资金
- Basic Science Research Program through the National Research Foundation of Korea - Ministry of Education [NRF-2017R1D1A1B03027982]
- institutional research program of Korea Institute of Science and Technology (KIST) [2E28070]
Morphology oriented synthesis of metal oxide doped silica structures have fascinating properties which needed to be explored extensively. In this work, NiO doped silica microsphere with beautiful flower-like morphology has been achieved by adopting a facile surfactant-assisted synthetic route using CTAB-ammonia in H2O-ethanol mixed solvent media. The sol-gel synthesis with effective variations of Ni/Si ratios up to 7.0, followed by a simple hydrothermal treatment and subsequent calcination leads to the formation of NiO-silica mesostructures with high nickel content. Detailed structural and elemental characterizations by using powder X-ray analysis (XRD), scanning electron (SEM) and transmission electron microscopy (TEM), N-2 adsorption-desorption, X-ray photoelectron spectroscopy (XPS) revealed that single cubic phase NiO doped mesoporous silica microspheres (for Ni/Si = 5:1 and 7:1) with good surface area (169 and 205 m(2) g(-1), for sample with Ni/Si = 7:1 and 5:1, respectively) and pore width 3-5 nm, have been formed with 3D flower-like shape and 500-600 nm particle size. These NiO-silica microspheres containing high Ni content up to 76 wt% have shown excellent paramagnetic properties at room temperature. (C) 2019 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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