Silver Nanoparticles Confined in SBA-15 Mesoporous Silica and the Application as a Sensor for Detecting Hydrogen Peroxide. (3rd April 2008)

• Record Type: Journal Article
• Authors: Lin, Dong-Hai; Jiang, Yan-Xia; Wang, Ying; Sun, Shi-Gang
• Other Names: Wong Michael Academic Editor.
• Is Part Of: Journal of nanomaterials. Volume 2008(2008)
• Publication Date: 2008-04-03
• Subjects: Nanostructured materials -- Periodicals; Nanotechnology -- Periodicals; Nanomatériaux; Nanostructured materials; Nanotechnology; Nanostructures; Nanotechnology; Periodicals; Fulltext; Internet Resources; Periodicals; 620.115
• DOI: 10.1155/2008/473791
• Languages: English
• ISSNs: 1687-4110

Abstract

Abstract : Silver nanoparticles within the pore channels of selectively grafted mesoporous silica SBA-15 were synthesized. Silanols on the external surface of as-SBA-15 were first capped by –Si ( CH 3 ) 3 groups. After removal of the template of capped SBA-15 by calcination, silanols on the internal surface of SBA-15 were modified by 3-aminopropyltrimethoxysilane (APTMS), and then formaldehyde was grafted by amino groups of APTMS, and further Ag( NH 3 ) 2 NO 3 SBA-15). High-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), Fourier transformation infrared spectroscopy (FTIR), nitrogen adsorption/desorption isotherms, and UV-vis spectra confirm that the silver nanoparticles have been confined inside the channels of SBA-15. In addition, theAg- m SBA-15 modified electrode (Ag- m SBA-15/GC) exhibited an excellent electrocatalytic activity toward the reduction of hydrogen peroxide (H 2 O 2 ). The proposedH 2 O 2 sensor exhibits a linear range of 48.5 μ M–0.97 M with a detection limit of 12 μ M (S/N = 3 ) and analytical time of 10 seconds per sample.