Dual-emissive ratiometric fluorescent nanosensor based on multi-nanomaterials for Ag+ determination in lake water. Issue 46 (21st October 2022)

• Record Type: Journal Article
• Authors: Zhu, Ling; Shi, Lujia; Tan, Yiping; Zhang, Huaiyin; Yin, Jiacheng; Xu, Chang; Wu, Danlian; Ma, Yunsu
• Is Part Of: RSC advances. Volume 12:Issue 46(2022)
• Page Start: 30113
• Page End: 30119
• Publication Date: 2022-10-21
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d2ra05167b
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A novel ratiometric fluorescent sensor (CDs/CdTe QDs@ZIF-8) combining the advantages of ratiometric and MOFs was synthesized for Ag + detection. Abstract : In this study, a sensitive ratiometric fluorescent nanosensor was constructed using a facile one-pot method by encapsulating carbon dots (CDs) and cadmium telluride quantum dots (CdTe QDs) into the pore cavities of a metal–organic framework (ZIF-8). In this nanosensor (CD/CdTe QD@ZIF-8), the fluorescence attributed to CdTe QDs was quenched by silver ions (Ag + ), and the fluorescence intensity of CDs did not change. The introduction of ZIF-8 into the system can not only adsorb Ag + but also easily separate CDs and CdTe QDs from the matrix. The developed CD/CdTe QD@ZIF-8 composite used as a ratiometric fluorescent probe exhibited high sensitivity and selectivity towards Ag + . The working linear range was 0.1–20 μM with a limit of detection (LOD) of 1.49 nM. Finally, the proposed nanosensor was applied to determine Ag + in lake water with satisfactory results.