title: Chitosan nanostructures by in situ electrospinning for high-efficiency PM2.5 capture.
abstract: Nanofiber-based air filters and electrostatic precipitation have stimulated considerable interest because of their high-efficiency for PM2.5 capture. In this paper, we introduce a new method of in situ electrospinning (e-spinning) of nanostructures into a polluted enclosed space to efficiently clean the air. From the comparisons of different polymer precursors and different PM2.5 capture techniques, it can be seen that in situ e-spinning of chitosan aqueous solution into the air exhibits the best PM2.5 capture efficiency, which may be attributed to the stronger polarity of chitosan and the synergistic effect of the strong electrostatic adsorption and surface adhesion of the electrospun (e-spun) nanofibers. A removal rate as high as 3.7 μg m-3s-1was obtained using this technology with a high efficiency of more than 95% PM2.5 capture. The results obtained from a field test in a smoking room (∼5 × 6 × 3 m3) are still in great agreement with those obtained in an experimental box (∼25 × 30 × 35 cm3). More importantly, chitosan is non-toxic and biodegradable, and is harmless to human health when used as a precursor for in situ e-spinning for PM2.5 capture.
authors.affiliation: Collaborative Innovation Center for Nanomaterials & Devices, College of Physics, Qingdao University, Qingdao 266071, China. yunze.long@163.com yunze.long@qdu.edu.cn.
authors.forename: Bin
authors.initials: B
authors.lastname: Zhang
authors.affiliation: Collaborative Innovation Center for Nanomaterials & Devices, College of Physics, Qingdao University, Qingdao 266071, China. yunze.long@163.com yunze.long@qdu.edu.cn.
authors.forename: Zhi-Guang
authors.initials: ZG
authors.lastname: Zhang
authors.affiliation: Collaborative Innovation Center for Nanomaterials & Devices, College of Physics, Qingdao University, Qingdao 266071, China. yunze.long@163.com yunze.long@qdu.edu.cn and Industrial Research Institute of Nonwovens & Technical Textiles, Qingdao University, Qingdao 266071, China.
authors.forename: Xu
authors.initials: X
authors.lastname: Yan
authors.affiliation: Collaborative Innovation Center for Nanomaterials & Devices, College of Physics, Qingdao University, Qingdao 266071, China. yunze.long@163.com yunze.long@qdu.edu.cn.
authors.forename: Xiao-Xiong
authors.initials: XX
authors.lastname: Wang
authors.affiliation: Collaborative Innovation Center for Nanomaterials & Devices, College of Physics, Qingdao University, Qingdao 266071, China. yunze.long@163.com yunze.long@qdu.edu.cn.
authors.forename: Hui
authors.initials: H
authors.lastname: Zhao
authors.affiliation: Collaborative Innovation Center for Nanomaterials & Devices, College of Physics, Qingdao University, Qingdao 266071, China. yunze.long@163.com yunze.long@qdu.edu.cn.
authors.forename: Jia
authors.initials: J
authors.lastname: Guo
authors.affiliation: Collaborative Innovation Center for Nanomaterials & Devices, College of Physics, Qingdao University, Qingdao 266071, China. yunze.long@163.com yunze.long@qdu.edu.cn.
authors.forename: Ji-Yong
authors.initials: JY
authors.lastname: Feng
authors.affiliation: Collaborative Innovation Center for Nanomaterials & Devices, College of Physics, Qingdao University, Qingdao 266071, China. yunze.long@163.com yunze.long@qdu.edu.cn and Industrial Research Institute of Nonwovens & Technical Textiles, Qingdao University, Qingdao 266071, China.
authors.forename: Yun-Ze
authors.identifier: http://orcid.org/0000-0002-4278-4515
authors.initials: YZ
authors.lastname: Long