Hydrous ferric oxide-magnetite-reduced graphene oxide nanocomposite for detection of arsenic using surface plasmon resonance

• Main Authors: Al-Rekabi, S. H., Mustapha Kamil, Yasmin, Abu Bakar, Muhammad Hafiz, Fen, Yap Wing, Lim, Hong Ngee, Samikannu, Kanagesan, Mahdi, Mohd Adzir
• Format: Article
• Language: English
• Published: Elsevier 2019
• Online Access: http://psasir.upm.edu.my/id/eprint/80122/1/Hydrous%20ferric%20oxide-magnetite-reduced%20graphene%20oxide%20nanocomposite%20for%20detection%20of%20arsenic%20using%20surface%20plasmon%20resonance.pdf; http://psasir.upm.edu.my/id/eprint/80122/; https://ui.adsabs.harvard.edu/search/q=author:%22Kanagesan%2C+S.%22&sort=date%20desc,%20bibcode%20desc

Surface plasmon resonance sensor coated with hydrous ferric oxide-magnetite-reduced (Fe2H2O4-Fe3O4-rGO) graphene oxide nanocomposite film was demonstrated to detect two toxic heavy metals; Arsenic (III) [As(III)] and Arsenic (V) [As(V)] in aqueous solution. The proposed nanocomposite film exhibited successful absorption of As with enhanced sensitivity and selectivity. Resultantly, when tested with different concentrations of As(III) and As(V), (0.1-1.0 ppb) the sensor ranged linearly with sensitivity of 2.196 °ppb-1 and 0.960 °ppb-1, respectively, and achieved a detection limit as low as 0.1 ppb. These results validate the potential of Fe2H2O4-Fe3O4-rGO nanocomposite material for optical sensing applications in As detection.