A ratiometric fluorescent sensor based on dual-emissive carbon dot for the selective detection of Cd2+
- Title
- A ratiometric fluorescent sensor based on dual-emissive carbon dot for the selective detection of Cd2+
- Creator
- Keerthana P.; Kumar Das A.; Bharath M.; Ghosh M.; Varghese A.
- Description
- Cadmium (Cd2+), a heavy metal ion used in numerous industries, has toxic adverse effects on the environment; it is crucial to develop a quick and reliable method for Cd2+ determination. Fluorescent biomass-derived carbon quantum dots (CD) with rich carboxyl groups on the surface were synthesized using water amaranth leaves by hydrothermal method with a 12.1% quantum yield. The surface of CD was further modified with 1-pyrene carboxaldehyde (PC) to synthesize pyrene carboxaldehyde-carbon quantum dots (PC-CD). This study developed a fluorescent ratiometric nanosensor using a covalently functionalized CD with pyrene derivative and demonstrates highly selective identification capability towards Cd2+ over competing metal ions. The Nano sensor has significant selectivity towards Cd2+ in an excellent linear range of 0-70 ?M with a detection limit as low as 15 nM and demonstrates excellent water solubility and biocompatibility. Transmission electron spectroscopy (TEM), Fourier Transform infrared spectroscopy (FT-IR), and X-ray photon spectroscopy (XPS) were used to identify the surface functionalization of PC-CD. Finally, the developed ratiometric sensor was used for detecting Cd2+ metal ions from various water effluents. 2023 Elsevier Ltd.
- Source
- Journal of Environmental Chemical Engineering, Vol-11, No. 2
- Date
- 2023-01-01
- Publisher
- Elsevier Ltd
- Subject
- Biomass-derived; Cadmium; Carbon quantum dots; Pollutant; Ratiometric fluorescence sensor
- Coverage
- Keerthana P., Department of Chemistry, CHRIST (Deemed to Be University), Karnataka, Bangalore, 560029, India; Kumar Das A., Department of Chemistry, CHRIST (Deemed to Be University), Karnataka, Bangalore, 560029, India; Bharath M., Department of Chemistry, Ashoka University, Haryana, 131029, India; Ghosh M., Department of Chemistry, Ashoka University, Haryana, 131029, India; Varghese A., Department of Chemistry, CHRIST (Deemed to Be University), Karnataka, Bangalore, 560029, India
- Rights
- Restricted Access
- Relation
- ISSN: 22133437
- Format
- Online
- Language
- English
- Type
- Article
Collection
Citation
Keerthana P.; Kumar Das A.; Bharath M.; Ghosh M.; Varghese A., “A ratiometric fluorescent sensor based on dual-emissive carbon dot for the selective detection of Cd2+,” CHRIST (Deemed To Be University) Institutional Repository, accessed February 25, 2025, https://archives.christuniversity.in/items/show/14295.