Colorimetric and rapid determination of Cr(III) ions in water samples using AuNPs modified with 11-mercaptoundecyl phosphonic acid: spectroscopic characterization and reaction mechanism. Issue 6 (3rd June 2018)

• Record Type: Journal Article
• Authors: García Grajeda, Blanca A.; Aguila, Sergio A.; Peinado Guevara, Héctor; Reynoso-Soto, Edgar; Ochoa-Terán, Adrián; Trujillo-Navarrete, Balter; Cruz Enríquez, Adriana; Campos-Gaxiola, José J.
• Is Part Of: Inorganic and nano-metal chemistry. Volume 48:Issue 6(2018)
• Page Start: 275
• Page End: 285
• Publication Date: 2018-06-03
• Subjects: AuNPs -- chromium -- SEM–EDS mapping -- UV–vis–IR characterization -- water samples; Inorganic compounds -- Synthesis -- Periodicals; Nanostructured materials -- Periodicals; Reactivity (Chemistry) -- Periodicals; Inorganic compounds -- Synthesis; Nanostructured materials; Reactivity (Chemistry); Periodicals; 546
• DOI: 10.1080/24701556.2018.1503680
• Languages: English
• ISSNs: 2470-1556

Abstract

Abstract: A facile colorimetric method for rapid determination of Cr(III) ions was developed using 11-mercaptoundecylphosphonic acid modified gold nanoparticles (AuNPs-MPA) in aqueous medium. The reaction of AuNPs-MPA + Cr(III) ions were were characterized by FTIR and Uv-Vis spectroscopy. The presence of Cr(III) easily induced aggregation of AuNPs-MPA, resulting in the color change from pink to blue. This method exhibited excellent selectivity toward Cr(III) compared to other metal cations. Optimal detection of Cr(III) was found in a pH range from 4 to 9, the detection time within 8 min. In addition, the developed effective probe has been successfully applied to detect Cr(III) water samples.