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Nonaqueous Sol−Gel Synthesized Hierarchical CeO2 Nanocrystal Microspheres as Novel Adsorbents for Wastewater Treatment
Abstract
Hierarchical CeO 2 nanocrystal microspheres were synthesized with a nonaqueous sol−gel method at a low temperature of 120 °C. The products were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), and nitrogen sorption measurements. The adsorption performances of hierarchical CeO 2 nanocrystal microspheres were tested with the batch removals of typical pollutants of Cr(VI) and rhodamine B from simulated wastewater. It was found that the nanostructured CeO 2 could effectively remove Cr(VI) without pH preadjustment. The Freundlich adsorption isotherm was applicable to describe the removal processes. Kinetics of the Cr(VI) removal was found to follow pseudosecond-order rate equation. Furthermore, the as-prepared and Cr(VI)-adsorbed hierarchical CeO 2 nanocrystal microspheres were carefully analyzed by X-ray photoelectron spectroscopy (XPS). On the basis of the XPS results, a possible mechanism of Cr(VI) removal with hierarchical CeO 2 nanocrystal microspheres was proposed. Moreover, these nonaqueous sol−gel synthesized hierarchical CeO 2 nanocrystal microspheres also exhibited remarkable ability to remove rhodamine B, suggesting they are promising absorbents for wastewater treatment.
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Cites
The adsorption of gases on plane surfaces of glass, mica and platinum
Langmuir, I. (1918) · Journal of the American Chemical Society · doi:10.1021/ja02242a004 · Cited by 23,242
Cited by
Li, X., Gao, X., Ai, L., & Jiang, J. (2015) · Chemical Engineering Journal · doi:10.1016/j.cej.2015.03.127 · Cited by 382
Xu, G.-R., An, Z.-H., Xu, K., Liu, Q., Das, R., & Zhao, H.-L. (2021) · Coordination Chemistry Reviews · doi:10.1016/j.ccr.2020.213554 · Cited by 379
Supraparticles: Functionality from Uniform Structural Motifs
Wintzheimer, S., Granath, T., Oppmann, M., Kister, T., Thai, T., Kraus, T., Vogel, N., & Mandel, K. (2018) · ACS Nano · doi:10.1021/acsnano.8b00873 · Cited by 253
Magnetic composite Fe3O4/CeO2 for adsorption of azo dye
Gao, S., Zhang, W., Zhou, H., & Chen, D. (2018) · Journal of Rare Earths · doi:10.1016/j.jre.2018.04.002 · Cited by 40
Metadata
- Authors
- Xiao, H., Ai, Z., & Zhang, L.
- Venue
- The Journal of Physical Chemistry C
- Publisher
- American Chemical Society (ACS)
- Published
- 2009-08-27
- Volume
- 113
- Issue
- 38
- Pages
- 16625-16630
- ISSN
- 1932-7447 (ISSN-L)
- 1932-7455
- OpenAlex
- W2071403949
- Cited by
- 193
- References
- 1
- FWCI
- 9.84
- Type
- journal article
- Language
- en
- Open access
- closed
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