Unknown

Dataset Information

0

Sensitive Detection of Sulfide Ion Based on Fluorescent Ionic Liquid-Graphene Quantum Dots Nanocomposite.


ABSTRACT: Sulfide ions (S2-) that are widely distributed in biological and industrial fields are extremely toxic and pose great harms to both ecological environment and human health. However, fluorescent sensors toward S2- ions commonly use S2--recovered fluorescence of fluorophore that is first quenched mainly by metal ions. Fluorescent probe which enables direct, selective, and sensitive detection of S2- ion is highly desirable. Herein, we demonstrate one-step preparation of fluorescent ionic liquid-graphene quantum dots (IL-GQDs) nanocomposite, which can act as a fluorescent probe for direct and sensitive detection of S2- ion. The IL-GQDs nanocomposite is easily synthesized via facile molecular fusion of carbon precursor and in situ surface modification of GQDs by IL under hydrothermal condition. The as-prepared IL-GQDs nanocomposite has uniform and ultrasmall size, high crystallinity, and bright green fluorescence (absolute photoluminescence quantum yield of 18.2%). S2- ions can strongly and selectively quench the fluorescence of IL-GQDs because of the anion exchange ability of IL. With IL-GQDs nanocomposite being fluorescent probe, direct and sensitive detection of S2- is realized with a linear detection range of 100nM-10μM and 10μM-0.2mM (limit of detection or LOD of 23nM). Detection of S2- ions in environmental river water is also achieved.

SUBMITTER: Qiu G 

PROVIDER: S-EPMC8120006 | biostudies-literature |

REPOSITORIES: biostudies-literature

Similar Datasets

| S-EPMC4630193 | biostudies-literature
| S-EPMC7039517 | biostudies-literature
| S-EPMC4073168 | biostudies-other
| S-EPMC8205432 | biostudies-literature
| S-EPMC6645081 | biostudies-literature
| S-EPMC4837401 | biostudies-other
| S-EPMC2773548 | biostudies-literature
| S-EPMC5501082 | biostudies-literature
2014-06-15 | E-GEOD-53989 | biostudies-arrayexpress
| S-EPMC6267503 | biostudies-literature