Details

Autor(en) / Beteiligte

• Wei, Dequan
• Lv, Shenghua
• Zuo, Jingjing
• Liang, Shan
• Wang, Jialin
• He, Tingxiang
• Liu, Leipeng

Titel

Fabrication of chitosan-based fluorescent hydrogel membranes cross-linked with bisbenzaldehyde for efficient selective detection and adsorption of Fe2

Ist Teil von

• International journal of biological macromolecules, 2024-06, Vol.270, p.132088-132088, Article 132088

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2024

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Chitosan, as a natural biomass material, is green, recyclable, sustainable and well biocompatible. The molecular chain is rich in active groups such as amino and hydroxyl groups, and its preparation of fluorescent probes has the advantages of biocompatibility and efficient detection performance. In this study, a bis(benzaldehyde) (BHD) fluorescent functional molecule was designed. Then a series of fluorescent chitosan-based hydrogel films (CSBHD) were prepared using chitosan as raw material and BHD as cross-linking agent. As a fluorescent probe for metal ions, CSBHD was able to efficiently detect Fe2+ with a linear correlation of fluorescence intensity in the range of 0–160 μM, and the limit of detection (LOD) was 0.55 μM. Moreover, it has excellent adsorption performance for Fe2+ ions, with a maximum adsorption capacity of 223.5 g/mg at 500 mg/L Fe2+ concentration. Finally, we characterised the structure and microscopic morphology of CSBHD films and found that CSBHD as a hydrogel film has a high cross-linking density, good water resistance, excellent thermal stability, strong resistance to swelling, and excellent stability in cycling tests. Hence, it has great potential for application in adsorption and detection of Fe2+ ions. It also provides a good strategy for the application of chitosan based fluorescent probe materials in environmental monitoring and heavy metal ion adsorption. •Design and development of a bis(benzaldehyde) (BHD) molecule with fluorescent functionality•Chitosan-based hydrogel membrane CSBHD with fluorescent properties was prepared.•The limit of detection (LOD) was 0.55 μM and the adsorption rate was about 89.4 %.•It provides new ideas for fluorescent probe research on chitosan biomass resources.