高性能,耐pH的膜,可有效地从废旧电池中回收
Yafei Su1, Huawen Peng1, Xufei Liu1
1Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 430074, Wuhan, P. R. China.
Nature communications
|November 28, 2024
概括
这项研究引入了一种新的纳米过膜 (TAD-TBMB TFCMs),用于在极端pH下稳定分离离子,这对于从耗尽的电池中回收至关重要. 这些膜表现出异常的pH电阻和高分离性能,性能优于商业替代品.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
背景情况:
- 传统的聚胺膜在极端的pH值下降解,阻碍了使用过的电池中有效的回收.
- 开发具有卓越pH稳定的强大的纳米过膜是资源回收的关键挑战.
研究的目的:
- 合成一种高性能纳米过膜,具有出色的pH电阻,用于离子分离.
- 在恶劣的酸性和基本性条件下评估新型膜的稳定性和分离性能.
主要方法:
- 在1,4,7,10-Tetraazacyclododecane (TAD) 和1,3,5-Tris (bromomethyl) benzene (TBMB) 之间进行界面四度化反应,形成薄膜复合膜 (TFCM).
- 在缩酸 (H2SO4,HNO3,HCl) 和基 (NaOH) 中进行浸泡试验,长达70天.
- 性能评估,包括在极端pH条件下的分离流量和排斥率 (例如,CO2+) 以及电池液的连续纳米过.
主要成果:
- 合成的TAD-TBMB TFCMs表现出显著的pH稳定性,在3M酸/溶液中维持70天后的性能,显著超过商业膜.
- 实现了高分离性能,流量为11.3 LMHB,在2 M H2SO4中排斥97%的CO2+,这是由于尺寸选和电荷排斥.
- 膜在30天的连续纳米过2M H2SO4和耗电池液中保持稳定.
结论:
- 在极端pH环境下,TAD-TBMB TFCM为离子分离提供了高度稳定和有效的解决方案.
- 这种膜技术在增强使用过的电池和其他回收应用中的回收过程方面具有显著的前景.
- TAD-TBMB TFCM的强大的化学结构在具有挑战性的化学条件下确保了长期的运行稳定性.
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