Lv, G., Dai, X., Lu, G., Ye, L., Wang, G., & Zhou, L. (2023). Facile fabrication of portable electrospun poly(vinyl alcohol)/sulfur quantum dots film sensor for sensitive and selective detection of Fe3+. Optical Materials, 135, 113227. https://doi.org/10.1016/j.optmat.2022.113227
Abstract:
Here, a portable nanofibrous composite film sensor based on biocompatible poly(vinyl alcohol) (PVA) and
fluorescent sulfur quantum dots (SQDs) was prepared by electrospinning method. To endow the PVA/SQDs film
sensor with high structural stability, glutaraldehyde was employed as cross-linking agent to react with PVA and SQDs. Thanks to the stabilization of PVA, the PVA/SQDs film showed strong and stable solid-state fluorescence, which overcomes the disadvantage that dried SQDs powder cannot emit fluorescence due to aggregation induced fluorescence quenching effect. In addition, the porous structure of PVA/SQDs film enables it to retain the sensitive
fluorescence response ability of SQDs to Fe3+. The PVA/SQDs film exhibited sensitive and selective
fluorescence quenching behavior towards Fe3+. The fluorescence intensity of PVA/SQDs film presented good
linear relationship with the concentration of Fe3+ in the range of 0–0.53 mM. The detection limit could reach
0.69 μM, which can well meet the detection demand of Fe3+ in drinking water. Additionally, using PVA/SQDs as a portable sensor to detect Fe3+ in real water sample was examined with satisfactory performance. Considering the simple preparation process and good sensing performance of PVA/SQDs, this paper opens up a new opportunity for using SQDs as a solid sensor to detect metal ions.
License type:
Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
Funding Info:
This research / project is supported by the National Natural Science Foundation of China - N/A
Grant Reference no. : U21A2097
This research / project is supported by the Natural Science Foundation of Guangxi Province - N/A
Grant Reference no. : 2017GXNSFFA198002
This research / project is supported by the Key Laboratory of Non-ferrous Metals and New Materials Processing Technology of Ministry of Education - Guangxi Key Laboratory of Optoelectronic Materials and Devices Open Fund
Grant Reference no. : 20KF-9