期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 466, 期 -, 页码 238-246出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2015.12.035
关键词
Hollow spheres; NiO; Hierarchical porosity; Adsorption; Congo red
资金
- National High Technology Research and Development Program (863 Program) of China [2012AA062701]
- National Natural Science Foundation of China [21433007, 51320105001, 51272199]
- Fundamental Research Funds for the Central Universities [2015-111-034]
- Self determined and Innovative Research Funds of SKLWUT [2015-ZD-1]
- Natural Science Foundation of Hubei Province of China [2015CFA001]
- Research Grant Council, Hong Kong SAR Government [ECS 809813]
- National Natural Science Funds [51208068, BY2013118]
- [04022]
- [REG-2]
Hollow microspheres and hierarchical porous nanostructured materials with desired morphologies have gained remarkable attention for their potential applications in environmental technology. In this study, NiO-SiO2 hollow microspheres were prepared by co-precipitation with SiO2 and nickel salt as precursors, followed by dipping in alkaline solution and calcination. The samples were characterized by X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, nitrogen adsorption, and X-ray photoelectron spectroscopy. The synthesized hollow spheres were composed of a SiO2 shell and hierarchical porous NiO nanosheets on the surface. Adsorption experiments suggested that NiO-SiO2 composite particles were powerful adsorbents for removal of Congo red from water, with a maximum adsorption capacity of 204.1 mg/g. The high specific surface areas, hollow structures, and hierarchical porous surfaces of the hollow composite particles are suitable for various applications, including adsorption of pollutants, chemical separation, and water purification. (C) 2015 Elsevier Inc. All rights reserved.
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