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：Fang Liu Xingxing Chen Haoming Liu Jie Zhao Meiqi Xi Hongshan Xiao Tongkang Lu Yu Cao Yan Li Lianmao Peng Xuelei Liang 

机构地区：[1]Center for Carbon-Based Electronics,Peking University,Beijing,100871,China [2]Key Laboratory for the Physics and Chemistry of Nanodevices,Department of Electronics,Peking University,Beijing,100871,China [3]College of Chemistry and Molecular Engineering,Peking University,Beijing,100871,China [4]Shanxi Institute for Carbon-Based Thin Film Electronics,Peking University(SICTFE-PKU),Taiyuan,030012,China [5]Taiyuan Laboratory for Carbon-Based Thin Film Electronics,Taiyuan,030012,China

出　　处：《Nano Research》2021年第11期4281-4287,共7页纳米研究（英文版）

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).

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.

关 键 词：carbon nanotubes closed-loop recycling high-yield LOW-COST high purity 

分 类 号：TB383[一般工业技术—材料科学与工程]