Reduced graphene oxide-wrapped silver nanoparticles for applications in ultrasensitive colorimetric detection of Cr(vi ) ions and the carbaryl pesticide
| Autor: | Ong Van Hoang, Anh-Tuan Le, Dang Thi Bich Hop, Phung Nhat Minh, Nguyen Tien Khi, Tran Quang Huy, Ngo Xuan Dinh, Van-Tuan Hoang, Nguyen Van Cuong, Tran Quoc Tuan |
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| Rok vydání: | 2020 |
| Předmět: |
Detection limit
Graphene Reducing agent Metal ions in aqueous solution 010401 analytical chemistry chemistry.chemical_element 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis Silver nanoparticle 0104 chemical sciences law.invention chemistry.chemical_compound Chromium chemistry law Carbaryl Materials Chemistry Surface plasmon resonance 0210 nano-technology Nuclear chemistry |
| Zdroj: | New Journal of Chemistry. 44:7611-7620 |
| ISSN: | 1369-9261 1144-0546 |
| Popis: | Reduced graphene oxide-wrapped silver nanoparticles (Ag@rGO) were synthesized by a simple photochemical process with the GO nanosheets as both a stabilizing and reducing agent. The synthesized Ag@rGO nanohybrids were used as a localized surface plasmon resonance (LSPR) colorimetric sensor for the detection of chromium(VI) and carbaryl. For chromium(VI), the result showed a color change from yellow to colorless and linear-dependence of the absorption intensity on the concentration of Cr(VI) in the range 0.1–25 μM. For carbaryl, the calibration curve presented a high level of linearity in the range of 0.1–50 μM corresponding to color changes from yellow to purple. The limits of detection (LODs) for Cr(VI) and carbaryl were found to be 31 nM and 42 nM, respectively. The novel Ag@rGO nanohybrids will become an excellent platform for colorimetric probes in the detection of Cr(VI) ions and carbaryl or other heavy metal ions/pesticides. |
| Databáze: | OpenAIRE |
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