Turning Agroforestry Waste into Value-Added Fluorescent Carbon Quantum Dots for Effective Detection of Fe3+in an Aqueous Environment
- authored by
- Haitao Ren, Fan Qi, Abdelkader Labidi, Ahmed A. Allam, Jamaan S. Ajarem, Detlef W. Bahnemann, Chuanyi Wang
- Abstract
In the context of the circular economy, the high quantity of agroforestry waste should be transformed into sustainable and high-value materials to abate pollution, CO2 emissions, and expensive waste disposal. Herein, the agroforestry waste of apple leaves was initially used as a precursor to extract the value-added nanomaterial carbon quantum dots (CQDs) by way of an easy hydrothermal strategy without complicated purification processes, as extracted CQDs doped with N and P possess a typical graphite-like structure, a fine particle size of 2.0 nm, and excitation-dependent photoluminescence (PL) behavior. The doping of N and P endows CQDs with a much higher quantum yield (18.1%), good water solubility, high fluorescence stability, and specific recognition ability for the detection of Fe3+. The fluorescence of CQDs could be quickly quenched by Fe3+ within 1 min and recovered with the addition of ascorbic acid, suggesting the recyclability of the prepared CQD-based fluorescent probe. Systematic analyses support that a synergistic mechanism of static fluorescence quenching and inner filter effect was involved in the detection of Fe3+ by CQDs, showing a linear range between 0 and 160 μM and a limit of detection (LOD) of 4.0 μM. Furthermore, the feasibility of detecting Fe3+ by CQDs in practice was verified by tap water/lake water samples. The present work evinces that apple leaves are useful in producing green and low-cost CQDs as a promising fluorescent probe for sensitive, rapid, and selective detection of Fe3+ in an aqueous environment.
- Organisation(s)
-
Institute of Technical Chemistry
- External Organisation(s)
-
Shaanxi University of Science and Technology
Nankai University
King Saud University
Saint Petersburg State University
University of Beni Suef
- Type
- Article
- Journal
- ACS ES and T Engineering
- Volume
- ´3
- Pages
- 260–270
- No. of pages
- 11
- Publication date
- 10.02.2023
- Publication status
- Published
- Peer reviewed
- Yes
- ASJC Scopus subject areas
- Chemical Engineering (miscellaneous), Chemical Health and Safety, Process Chemistry and Technology, Environmental Chemistry
- Sustainable Development Goals
- SDG 8 - Decent Work and Economic Growth, SDG 12 - Responsible Consumption and Production
- Electronic version(s)
-
https://doi.org/10.1021/acsestengg.2c00294 (Access:
Closed)
