基于粘土的二维膜,用于有效的海水淡化和分子选
Yan Chen1, Jia-Long Gu1, Min-Yue Huang1
1The Education Ministry Key Laboratory of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials, College of Chemistry and Materials Science, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China.
ACS applied materials & interfaces
|December 29, 2023
概括
研究人员通过插入Ca2+,Fe3+和Al3+开发了新的蒙特莫里隆石 (MMT) 膜. 这些修改后的MMT膜显示了更好的离子和染料去除,显示了水净化应用的希望,如海水淡化和纳米过.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 环境科学 环境科学
背景情况:
- 蒙莫里隆石 (MMT) 是一种离子可交换的粘土矿物质,具有分离技术的潜力.
- 在MMT纳米薄膜内离子的插入可以改变膜性质.
- 开发有效的膜来去除离子和染料对于水处理至关重要.
研究的目的:
- 为了合成和表征Ca2+,Fe3+和Al3+交的MMT膜.
- 为了研究这些修改后的MMT膜的离子和染料去除能力.
- 评估这些膜在海水淡化和纳米过方面的潜力.
主要方法:
- 原始的Na+-MMT膜与Ca2+,Fe3+和Al3+进行离子交换.
- 制造二维的MMT膜. 制造二维的MMT膜.
- 膜性质的表征,包括d间距.
- 测试离子和染料选性能和水的透度.
主要成果:
- Fe3+-MMT和Al3+-MMT膜表现出由于更强的阴子-MMT相互作用而减少的d-间距.
- 间隔显著改善了离子和染料选性能.
- 一个Al3+-MMT膜 (1.17μm) 实现了94%的Na+排斥,在120小时内性能稳定.
- 一个更薄的Al3+-MMT膜 (500nm) 显示了94%的罗达胺B排斥和高水透率 (73 L m-2 h-1 bar-1).
结论:
- 2+,Fe3+和Al3+间隔增强了MMT膜的离子和染料选性能.
- Al3+-MMT膜在离子和染料去除方面表现出卓越的稳定性和效率.
- 这些修改后的MMT膜显示了先进的净水技术 (如海水淡化和纳米过) 的巨大潜力.
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