posted on 2024-03-13, 08:44authored byYaohan Du, Yufeng Li, Guo Huang, Hong Pu, Qun Li, Chenyang Lu, Luxi Tan, Lichun Dong, Cailong Zhou
The
significant threat posed by the high toxicity of heavy metals
and antibiotics in water pollutants has prompted a growing emphasis
on the development of highly efficient removal methods for these pollutants.
In this paper, flexible electrospinning polyacrylonitrile (PAN) nanofiber-supported
CdBi2S4 was synthesized via a hydrothermal method,
followed by amination treatment with diethylenetriamine (DETA). The
as-prepared CdBi2S4/NH2–PAN
nanofiber, enriched with sulfur vacancies, demonstrated outstanding
visible-light trapping ability and a suitable band gap, leading to
efficient separation and transport of photogenerated carriers, ultimately
resulting in exceptional photocatalytic capability. The optimal 3-CdBi2S4/NH2–PAN nanofiber achieved
impressive reduction rates of 92.26% for Cr(VI) and 96.45% for tetracycline
hydrochloride (TCH) within 120 min, which were much higher than those
for CdS/NH2–PAN, Bi2S3/NH2–PAN, and CdBi2S4/PAN nanofibers.
After five cycles, the removal rate of the CdBi2S4/NH2–PAN nanofiber consistently remained above
90%. Their ease of separation and recovery from the application environment
contributes to their practicality. Additionally, compared with conventional
suspended particle catalyzers, the composite nanofiber exhibited remarkable
flexibility and self-supporting properties.