Details
| Original language | English |
|---|---|
| Pages (from-to) | 260–270 |
| Number of pages | 11 |
| Journal | ACS ES and T Engineering |
| Volume | ´3 |
| Issue number | 2 |
| Early online date | 3 Dec 2022 |
| Publication status | Published - 10 Feb 2023 |
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.
Keywords
- carbon quantum dots, fluorescent sensor, green production, metal ion detection, waste disposal
ASJC Scopus subject areas
- Chemical Engineering(all)
- Chemical Engineering (miscellaneous)
- Chemical Engineering(all)
- Chemical Health and Safety
- Chemical Engineering(all)
- Process Chemistry and Technology
- Environmental Science(all)
- Environmental Chemistry
Sustainable Development Goals
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In: ACS ES and T Engineering, Vol. ´3, No. 2, 10.02.2023, p. 260–270.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Turning Agroforestry Waste into Value-Added Fluorescent Carbon Quantum Dots for Effective Detection of Fe3+in an Aqueous Environment
AU - Ren, Haitao
AU - Qi, Fan
AU - Labidi, Abdelkader
AU - Allam, Ahmed A.
AU - Ajarem, Jamaan S.
AU - Bahnemann, Detlef W.
AU - Wang, Chuanyi
N1 - Funding Information: This work was supported by the National Natural Science Foundation of China (21976116 and 52161145409), Shaanxi Science and Technology Program (2020KWZ-005), and SAFEA of China (“Belt and Road” Innovative Exchange Foreign Expert Project, DL2021041001L). The authors acknowledge Researchers Supporting Project (no. RSP-2021/149), King Saud University, Riyadh, Saudi Arabia.
PY - 2023/2/10
Y1 - 2023/2/10
N2 - 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.
AB - 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.
KW - carbon quantum dots
KW - fluorescent sensor
KW - green production
KW - metal ion detection
KW - waste disposal
UR - http://www.scopus.com/inward/record.url?scp=85143610316&partnerID=8YFLogxK
U2 - 10.1021/acsestengg.2c00294
DO - 10.1021/acsestengg.2c00294
M3 - Article
AN - SCOPUS:85143610316
VL - ´3
SP - 260
EP - 270
JO - ACS ES and T Engineering
JF - ACS ES and T Engineering
IS - 2
ER -