4.8 Article

Bifunctional Regenerated Cellulose/Polyaniline/Nanosilver Fibers as a Catalyst/Bactericide for Water Decontamination

Journal

ACS APPLIED MATERIALS & INTERFACES
Volume 13, Issue 3, Pages 4410-4418

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c20188

Keywords

cellulose; alkali/urea solvent; fibers; polyaniline/nanosilver; water decontamination

Funding

  1. Science Foundation for High-Level Talents of Wuyi University [AL2018010]
  2. Guangdong Basic and Applied Basic Research Foundation [2019A1515110684]
  3. Foundation of Department of Education Guangdong Province [2019KQNCX163, 2020KTSCX155]
  4. Jiangmen Basic and Theoretical Scientific Research Project [2020030102300005320]
  5. Wuyi University-Hong Kong Joint Research Fund [2019WGALH13]
  6. National Natural Science Foundation of China [52003061]
  7. GDAS' Project of Science and Technology Development [2020GDASYL-20200103066]

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Through a green approach, regenerated cellulose fibers with nanostructured pores were designed and manufactured, showing potential in improving water pollution treatment efficiency through the combination of nanotechnologies, demonstrating their potential in catalytic and bactericidal applications.
For antagonizing urgent water pollution and increasing environmental consciousness, the integration of renewable resources and nanotechnologies has become a trend to improve water quality in the ecosystem. Here, we designed a green route to fabricate regenerated cellulose fibers (CFs) with 3D micro- and nanoporous structures in NaOH/urea aqueous solvent systems via a scalable wet-spinning procedure as support materials for nanoparticles (NPs). Modification of CFs with polyaniline@Ag nanocomposites through in situ reduction of the silver ion with aqueous aniline led to enhanced pollutant removal efficiency of functional cellulose-based fibers (FCFs), demonstrating both rapid hydrogenation catalytic performance for the reduction of p-nitrophenol and high antibacterial properties for in-flow water purification. Most importantly, the hierarchically porous structures of FCFs not only provided carrier space but also formed a limiting domain guaranteeing the homogeneity of FCFs even with a Ag NP content as high as 36.47 wt %. The prepared functional fibers show good behavior in in-flow water purification, representing significant advancement in the use of biomass fibers for catalytic and bactericidal applications in liquid media.

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