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Updated: Jan 23, 2026
14:52
Fabrication of Three-Dimensional Graphene-Based Polyhedrons via Origami-Like Self-Folding
Published on: September 23, 2018
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Three-dimensional graphene/titanium dioxide composite for enhanced U(VI) capture: Insights from batch experiments,
Shujun Yu1, Dongli Wei1, Lei Shi1
1MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, PR China.
Environmental Pollution (Barking, Essex : 1987)
|June 26, 2019
Summary
A novel three-dimensional graphene/titanium dioxide composite (3D GA/TiO2) effectively removes uranium (U(VI)) from wastewater. This advanced adsorbent demonstrates superior performance compared to existing materials, offering potential for nuclear pollution control.
Area of Science:
- Materials Science
- Environmental Chemistry
- Nanotechnology
Background:
- Efficient removal of uranium (U(VI)) from aqueous solutions is crucial for environmental protection and sustainable development.
- Nuclear industrial activities generate wastewater containing U(VI), necessitating effective remediation strategies.
Purpose of the Study:
- To synthesize and evaluate a three-dimensional graphene/titanium dioxide composite (3D GA/TiO2) as an adsorbent for U(VI) removal.
- To investigate the adsorption performance of 3D GA/TiO2 under varying conditions (contact time, temperature, pH, ion strength).
Main Methods:
- Synthesis of 3D GA/TiO2 composite.
- Characterization using X-ray diffraction, Raman spectroscopy, FTIR, and XPS.
- Batch adsorption experiments to determine U(VI) removal efficiency.
- Kinetic and isotherm modeling (pseudo-second order, Langmuir).
- Density Functional Theory (DFT) calculations for interaction analysis.
Main Results:
- 3D GA/TiO2 exhibited a high adsorption capacity of 441.3 mg/g for U(VI), significantly outperforming GO, rGO, and TiO2.
- Adsorption followed pseudo-second order kinetics and Langmuir isotherm models.
- XPS and DFT calculations confirmed strong chemisorption via surface complex formation with U-O bonds.
Conclusions:
- The 3D GA/TiO2 composite is a highly effective adsorbent for U(VI) removal from wastewater.
- The material's superior performance is attributed to synergistic effects and strong chemisorption.
- 3D GA/TiO2 shows significant potential for mitigating nuclear industrial pollution.
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