通过凝辅助策略为高容量和快速响应容量化海水淡化,量身定制B,N-丰富的碳纳米板
Liuqian Yang1,2, Yanan Wang1,2, Jiakai Liu1,2
1Laboratory of Environmental Sciences and Technology, Xinjiang Technical Institute of Physics & Chemistry, Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi 830011, China.
ACS applied materials & interfaces
|August 21, 2023
概括
这项研究引入了和添加的新型碳纳米片,用于高效的水淡化. 与传统活性炭相比,这些先进的材料显示出明显增强的盐吸附能力和速度.
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:
- 设计用于电容脱离离子 (CDI) 的高性能碳电极对于水淡化至关重要.
- 实现高盐吸附能力 (SAC) 和盐吸附率 (SAR) 仍然是一个重大挑战.
研究的目的:
- 开发新的二维和丰富碳纳米板 (BNCTs) 进行高效的海水淡化.
- 为了研究双和兴奋剂对电极性能的影响.
主要方法:
- 使用酸,聚乙烯醇和聚乙烯胺的凝辅助策略被采用.
- 用冷干燥和热解来制造超薄 (∼2 nm) 的BNCTs,具有高异构原子兴奋剂 (14.5%B,14.8%N).
- 进行密度函数理论 (DFT) 计算以了解吸附机制.
主要成果:
- 合成的BNCTs在500毫克L NaCl溶液中表现出了42.5毫克g-1的优异SAC和4.25毫克g-1的SARmin-1的SAR.
- 性能指标是传统活性炭的四倍.
- DFT计算证实了由于双重B和N兴奋剂而增强的Na+吸附.
结论:
- 凝辅助合成为制造高效碳酸性电极提供了一条新的途径.
- BNCT为先进的水淡化提供了一个有前途的解决方案.
- 整合有利的表面形态和 heteroatom doping 是优越电极性能的关键.
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