Ultrasensitive detection of arsenic in water using laser-scribed graphene-based electrodes
Arsenic contamination in water poses a serious health risk due to its high toxicity, even at ppb levels. In this work, we report a cost-effective graphene-based sensor with ultralow detection capabilities for arsenic. This is achieved by enhancing the catalytic efficiency of graphene electrodes through sunlight-assisted photothermal oxidation of a metal salt into metal oxide nanoparticles. The sensor demonstrated high sensitivity (34.81 ± 1.74 μA cm<sup>-2</sup> ppb<sup>-1</sup>) and an ultralow detection limit (LOD 0.0636 ppb). Field tests on water samples from arsenic-contaminated zones in West Bengal, India, showed results consistent with the state-of-the-art ICP-OES analysis, highlighting the sensor's potential for practical, on-site arsenic monitoring.
Authors
- A. Mohanty (ORCID: https://orcid.org/0009-0005-8824-162X)
- Gopal K. Pradhan (ORCID: https://orcid.org/0000-0002-1956-7248)
- Pranati Nayak (ORCID: https://orcid.org/0000-0002-9442-5485)
- Shubham Upadhye (ORCID: https://orcid.org/0009-0008-6152-7830)
Institutions
- KIIT University (IN)
- Oil India (India) (IN)
Publication Details
- Journal
- Journal of Materials Chemistry B
- Published
- 2025-01-01
- DOI
- https://doi.org/10.1039/d5tb00041f
- Citations
- 1
- Primary Topic
- Advanced biosensing and bioanalysis techniques
- Type
- article
- Field-Weighted Citation Impact
- 0.81