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Two-dimensional titanium carbide MXene produced by ternary cations intercalation via structural control with
Zehai Xu1, Yufan Zhang2, Minmin Liu1
1Center for Membrane and Water Science & Technology, Institute of Oceanic and Environmental Chemical Engineering, State Key Lab Breeding Base of Green Chemical Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
Iscience
|December 1, 2022
Summary
A new method uses ternary cations to modify MXene (Ti3C2Tx) for highly efficient lead adsorption. This material significantly reduces lead contamination, protecting ecosystems and public health.
Area of Science:
- Materials Science
- Environmental Science
- Nanotechnology
Background:
- Effective lead (Pb) removal is critical for environmental protection and public health.
- Existing methods for lead decontamination face challenges in efficiency and accessibility.
- Titanium carbide MXene (Ti3C2Tx) shows potential for adsorption but requires structural modification for enhanced performance.
Purpose of the Study:
- To develop a novel Ti3C2Tx MXene material for highly efficient lead adsorption.
- To precisely control the structure of Ti3C2Tx MXene through ternary cation intercalation.
- To investigate the mechanism of enhanced lead adsorption by modified MXene.
Main Methods:
- Synthesized Ti3C2Tx MXene using a mixed fluorinated salts wet etching-alkalization approach.
- Intercalated ternary cations (Li+, K+, Na+) into Ti3C2Tx layers to tune interlayer spacing.
- Characterized the structural changes and surface properties of the modified MXene.
- Evaluated lead adsorption capacity and efficiency using batch experiments.
Main Results:
- Achieved precise control over Ti3C2Tx interlayer distance (9.8–15.9 Å) via ternary cation intercalation.
- Generated a high density of complexing groups, enhancing hydrophilicity and accessibility.
- Demonstrated a high lead adsorption capacity of 267.2 mg/g.
- Reduced lead concentration from 10 mg/L to 0.009 mg/L, surpassing drinking water standards.
Conclusions:
- Ternary cation intercalation is an effective strategy for tailoring Ti3C2Tx MXene structure and enhancing lead adsorption.
- The modified MXene offers a promising solution for efficient lead removal in environmental remediation.
- This approach contributes to advancing materials for water purification and safeguarding public health.
