从ZIF-8获得的N-Dop等级多孔碳框架的可控制的制备,用于高效的电容脱离离
Longyu Zhang1,2, Rui Wang2, Wencui Chai1,2,3
1School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China.
ACS applied materials & interfaces
|October 3, 2023
概括
来自金属有机框架 (MOF) 的层次性多孔碳在电容脱离离 (CDI) 中表现更好. 这种新型电极材料提供了增强的盐吸附和离子扩散,以实现高效的淡化水.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 环境科学 环境科学
背景情况:
- 容量脱离离子 (CDI) 是一种关键的海水淡化技术.
- 金属有机框架 (MOF) 衍生碳材料是有希望的电极候选者,因为它们的可调节结构.
- MOF衍生碳中的单孔结构限制了它们的应用潜力.
研究的目的:
- 从ZIF-8.8中合成和描述一个有序的层次性多孔碳框架 (OMCF).
- 将OMCF的电化学和CDI性能与微孔碳框架 (MCF) 进行比较.
- 评估MOF中N-doped等级多孔碳在CDI应用中的潜力.
主要方法:
- 模板方法采用以酸伊米达酸框架-8 (ZIF-8) 作为前体.
- 孔隙结构,表面特性和电化学性能的表征.
- 在不同的条件下测试NaCl溶液中的CDI性能.
主要成果:
- 与MCF相比,OMCF表现出更高的特定表面积和更好的水友性.
- OMCF表现出优异的特定电容和离子扩散率.
- OMCF在500毫克L-1 NaCl溶液中实现了更高的吸附能力 (12.17毫克·g-1) 和盐吸附率 (3.34毫克·g-1·min-1).
- 脱离离子化动力学遵循伪第一阶动力学,表明双层电容控制.
结论:
- 来自MOFs的等级性多孔碳显著提高了CDI的性能.
- OMCF材料是传统电极材料的可行的替代品,用于海水淡化.
- 这项研究为CDI开发MOF衍生的等级碳提供了宝贵的见解.
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