High-yield and low-cost separation of high-purity semiconducting single-walled carbon nanotubes with closed-loop recycling of raw materials and solvents
作者机构：Center for Carbon-Based ElectronicsPeking UniversityBeijing100871China Key Laboratory for the Physics and Chemistry of NanodevicesDepartment of ElectronicsPeking UniversityBeijing100871China College of Chemistry and Molecular EngineeringPeking UniversityBeijing100871China Shanxi Institute for Carbon-Based Thin Film ElectronicsPeking University(SICTFE-PKU)Taiyuan030012China Taiyuan Laboratory for Carbon-Based Thin Film ElectronicsTaiyuan030012China
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2021年第14卷第11期
页 面：4281-4287页
核心收录：
学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学]
基 金：This work was supported by the National Key Research and Development Program(No.2016YFA0201902) the National Natural Science Foundation of China(No.51991341) Young Talents Program of Beijing(No.2018000020028G349) the Open Research Fund of Key Laboratory of Space Utilization,Chinese Academy of Sciences(No.LSU-KFJJ-2020-06)
主 题：carbon nanotubes closed-loop recycling high-yield low-cost high purity
摘 要：Semiconducting single-walled carbon nanotubes (s-SWCNTs) are the foundation of CNT-based electronics and optoelectronics. For practical applications, s-SWCNTs should be produced with high purity, high structural quality, low cost, and high yield. Currently conjugated polymer wrapping method shows great potential to fulfill these requirements due to its advantages of simple operation process, high purity separation, and easy scaling-up. However, only a small portion of both CNTs and polymers go into the final solution, and most of them are discarded after a single use, resulting in high cost and low yield. In this paper, we introduce a closed-loop recycling strategy, in which raw materials (CNTs and polymers) and solvents were all recycled and reused for multiple separation cycles. In each cycle, high-purity ( 99.9%) s-SWCNTs were obtained with no significant change of structural quality. After 7 times of recycling and separation, the material cost was reduced to ∼ 1% in comparison with commercially available products, and total yield was increased to 36% in comparison with 2%–5% for single cycle separation. Our proposed closed-loop recycling strategy paves the way for low-cost and high-yield mass production of high-quality s-SWCNTs.
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