Journal
NANOMATERIALS
Volume 10, Issue 8, Pages -Publisher
MDPI
DOI: 10.3390/nano10081539
Keywords
hierarchically porous Cu-BTC; facile synthesis; uranium (VI) removal; enhanced adsorption capacity
Categories
Funding
- Guangdong Basic and Applied Basic Research Foundation [2019A1515110706, 2019A1515110252]
- Xi'an University of Science and Technology Doctoral start-up project [2018QDJ011]
- Preparation and properties of new solid waste-based cementitious materials project of Xi'an University of Science and Technology [6000190120]
- National Nature Science Foundation of China [51702157]
- China Postdoctoral Science Foundation [2017M611795]
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The effective removal of uranium from an aqueous solution is a highly valuable process for the environment and health. In this study, we developed a facile and rapid method to synthesize hierarchically porous Cu-BTC (RT-Cu-BTC) using a cooperative template strategy. The as-synthesized RT-Cu-BTC exhibited hierarchically porous structure and excellent thermostability, as revealed by X-ray powder diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy, and thermogravimetric analysis. Compared with conventional metal-organic frameworks (MOFs) and zeolites, the obtained RT-Cu-BTC exhibited enhanced adsorption capacity (839.7 mg center dot g(-1)) and high removal efficiency (99.8%) in the capture of uranium (VI) from aqueous solutions. Furthermore, the conditions such as adsorbent dose, contact time, and temperature in adsorption of uranium (VI) by RT-Cu-BTC were investigated in detail. The thermodynamics data demonstrated the spontaneous and endothermic nature of the uranium (VI) adsorption process. The Langmuir isotherm and pseudo-second-order models could better reflect the adsorption process of uranium (VI) onto RT-Cu-BTC. In addition, the as-synthesized RT-Cu-BTC showed excellent stability in removing uranium (VI) from an aqueous solution. This work provides a facile and rapid approach for fabricating hierarchically porous MOFs to realize a highly efficient removal of uranium (VI) from aqueous systems.
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