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A Novel Turn-On Fluorescent Sensor Based on Sulfur Quantum Dots and $MnO_{2}$ Nanosheet Architectures for Detection of Hydrazine
| Content Provider | MDPI |
|---|---|
| Author | Li, Xin Wang, Xiaobin Guo, Wei Luan, Feng Tian, Chunyuan Zhuang, Xuming Zhao, Lijun |
| Copyright Year | 2022 |
| Description | In this paper, the $SQDs@MnO_{2}$ NS as the probe was applied to construct a novel “turn-on” fluorescent sensor for sensitive and selective detection of hydrazine $(N_{2}H_{4}$). Sulfur quantum dots (SQDs) and $MnO_{2}$ nanosheets $(MnO_{2}$ NS) were simply mixed, through the process of adsorption to prepare the architectures of $SQDs@MnO_{2}$ NS. The fluorescent emissions of $SQDs@MnO_{2}$ NS play a key role to indicate the state of the sensor. According to the inner filter effect (IFE) mechanism, the state of the sensor at the “off” position, or low emission, under the presence of $MnO_{2}$ NS, is which the ultraviolet and visible spectrum overlaps with the fluorescence emission spectrum of SQDs. Under the optimal conditions, the emission was gradually recovered with the addition of the $N_{2}H_{4}$, since the $N_{2}H_{4}$ as a strong reductant could make the $MnO_{2}$ NS converted into $Mn^{2+}$, the state of the sensor at the “on”. Meanwhile, the fluorescent sensor possesses good selectivity and high sensitivity, and the detection concentration of $N_{2}H_{4}$ with a wide range from 0.1 µM to 10 mM with a detection limit of 0.072 µM. Furthermore, actual samples were successful in detecting certain implications, indicating that the fluorescent sensor possesses the potential application ability to monitor the $N_{2}H_{4}$ in the water. |
| Starting Page | 2207 |
| e-ISSN | 20794991 |
| DOI | 10.3390/nano12132207 |
| Journal | Nanomaterials |
| Issue Number | 13 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-06-27 |
| Access Restriction | Open |
| Subject Keyword | Nanomaterials Spectroscopy Sulfur Quantum Dots Mno2 Nanosheet Hydrazine Fluorescence Probe |
| Content Type | Text |
| Resource Type | Article |
