The extraction of uranium using graphene aerogel loading organic solution

Chen, Mumei; Li, Zheng; Li, Jihao; Li, Jingye; Li, Qingnuan; Zhang, Lan

doi:10.1016/j.talanta.2017.01.070

Cited by 35 publications

(12 citation statements)

References 47 publications

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“…Silica aerogel is a low-density porous solid material with three-dimensional reticulate skeletons formed by interconnected SiO 2 nanoparticles [1]. Benefiting from its special structure, silica aerogel possesses various unique properties [2,3,4,5] such as high specific surface area and porosity, low thermal conductivity, high visible-light transmittance, and low dielectric constant. Owing to these properties, silica aerogel was applied in various fields such as catalyst carriers [6,7,8], heat insulation [9,10,11], acoustic insulation [12,13,14], Cherenkov radiation detectors [15], adsorbents [16,17,18,19], and thermal energy storage [20].…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Methylsilsesquioxane Aerogels with Uniform Mesopores by Microwave Drying

Guo

Shan

Lei³

et al. 2019

Polymers

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Methylsilsesquioxane (MSQ) aerogels with uniform mesopores were facilely prepared via a sol–gel process followed by microwave drying with methyltrimethoxysilane (MTMS) as a precursor, hydrochloric acid (HCl) as a catalyst, water and methanol as solvents, hexadecyltrimethylammonium chloride (CTAC) as a surfactant and template, and propylene oxide (PO) as a gelation agent. The microstructure, chemical composition, and pore structures of the resultant MSQ aerogels were investigated in detail to achieve controllable preparation of MSQ aerogels, and the thermal stability of MSQ aerogels was also analyzed. The gelation agent, catalyst, solvent, and microwave power have important roles related to the pore structures of MSQ aerogels. Meanwhile, the microwave drying method was found to not only have a remarkable effect on improving production efficiency, but also to be conducive to avoiding the collapse of pore structure (especially micropores) during drying. The resulting MSQ aerogel microwave-dried at 500 W possessed a specific surface area up to 821 m2/g and a mesopore size of 20 nm, and displayed good thermal stability.

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Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Methylsilsesquioxane Aerogels with Uniform Mesopores by Microwave Drying

Guo

Shan

Lei³

et al. 2019

Polymers

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“…Consequently, researchers have investigated methods for the efficient removal and recovery of uranium from aqueous solutions to protect the environment and control nuclides pollution. At present, various methods have been developed to address uranium in water, including membrane separation 4,5 , photoelectrochemical reduction 6 , biological treatment 7,8 , solvent extraction 9,10 , ion exchange 11,12 and adsorption 13–15 . Adsorption is the most extensively used approach for uranium removal because of its high efficiency, low cost, simple operation and low production of secondary pollution.…”

Section: Introductionmentioning

confidence: 99%

Preparation of a magnetic reduced-graphene oxide/tea waste composite for high-efficiency sorption of uranium

Yang

Zhu

et al. 2019

Sci Rep

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The preparation and application of adsorptive materials with low cost and high-efficiency recovery of uranium from nuclear waste is necessary for the development of sustainable, clean energy resources and to avoid nuclear pollution. In this work, the capacity of tea waste and tea waste hybrids as inexpensive sorbents for uranium removal from water solutions was investigated. Composites of graphene oxide (GO) and tea waste (TW) exhibited a promising adsorption performance for uranium from aqueous solutions. The composites GOTW and magnetic rGO/Fe 3 O 4 /TW show high adsorption capacities ( Q m (TW) = 91.72 mg/g, Q m (GOTW) = 111.61 mg/g and Q m (rGO/Fe3O4/TW) = 104.95 mg/g) and removal rates (~99%) for U(VI). The equilibrium sorption of the adsorbents fitted well to the Langmuir model, and the sorption rate fitted well to a pseudo-second-order kinetic model. The thermodynamic parameters indicated that sorption was spontaneous and favourable. The prepared adsorbents were used for the removal of uranium from real water samples as well. The results revealed that GOTW and rGO/Fe 3 O 4 /TW can be used to remediate nuclear industrial effluent as a potential adsorbent.

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“…Silica aerogel is a low-density porous solid material with three-dimensional reticulate skeletons formed by interconnected SiO2 nanoparticles [1]. Benefited from its special structure, silica aerogel possesses various unique properties [2][3][4][5] such as high specific surface area and porosity, low thermal conductivity, high visible-light transmittance and low dielectric constant. Owing to these properties, silica aerogel has been applied in various fields such as catalyst carrier [6][7][8], heat insulation [9][10][11], acoustic insulation [12][13][14], Cherenkov radiation detectors [15] and adsorbent [16][17][18][19], thermal energy storage [20].…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Methylsilsesquioxane Aerogels with Uniform Mesopores by Microwave Drying

Guo¹,

Shan²,

Lei³

et al. 2019

Preprint

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Methylsilsesquioxane aerogels with uniform mesopores have been facilely prepared via a sol–gel process followed by microwave drying with methyltrimethoxysilane (MTMS) as precursor, hydrochloric acid (HCl) as catalyst, water and methanol as solvents, hexadecyltrimethylammonium chloride (CTAC) as surfactant and template and propylene oxide (PO) as gelation agent. The microstructure, chemical composition and pore structures of the resultant MSQ aerogels were investigated in detail to achieve controllable preparation of MSQ aerogels, and the thermal stability of MSQ aerogels was also analyzed. The gelation agent, catalyst, solvent and microwave power have important roles on pore structures of MSQ aerogels. Meanwhile, microwave drying method is found to not only have a remarkable effect on improving production efficiency, but also be conducive to avoid the collapse of pore structure especially micropores during drying. The resulting MSQ aerogel microwave-dried at 500 W possesses a specific surface area up to 821 m2/g and a mesopore size of 20 nm, and displays good thermal stability.

show abstract

The extraction of uranium using graphene aerogel loading organic solution

Cited by 35 publications

References 47 publications

Facile Synthesis of Methylsilsesquioxane Aerogels with Uniform Mesopores by Microwave Drying

Facile Synthesis of Methylsilsesquioxane Aerogels with Uniform Mesopores by Microwave Drying

Preparation of a magnetic reduced-graphene oxide/tea waste composite for high-efficiency sorption of uranium

Facile Synthesis of Methylsilsesquioxane Aerogels with Uniform Mesopores by Microwave Drying

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