title: Electrochemical sensing based on gold nanoparticle-decorated halloysite nanotube composites.
abstract: Novel gold nanoparticle-decorated halloysite nanotube (AuNP-HNT) composites were effectively synthesized and then used for electrochemical sensing applications. The AuNP-HNT nanocomposites were characterized by transmission electron microscopy, field emission scanning electron microscopy, zeta potential, and UV-Vis spectroscopy. The AuNP-HNT composite-based modified electrode exhibited high eletrocatalytic activity to the reduction of hydrogen peroxide (H(2)O(2)) with a linear range of 5.0×10(-6) to 2.55×10(-4)M and a detection limit of 1×10(-6)M (signal/noise=3), indicating that it could be used as a novel nonenzymatic electrochemical H(2)O(2) sensor. Furthermore, the Ru(bpy)(3)(2+)/AuNP-HNT/Nafion composite film modified electrode exhibited good electrochemiluminescence activity for determining tripropylamine.
authors.affiliation: Education Ministry Key Laboratory of Resource Chemistry, Department of Chemistry, College of Life and Environmental Sciences, Shanghai Normal University, Shanghai 200234, China.
authors.forename: Hongmei
authors.initials: H
authors.lastname: Cao
authors.forename: Xiumei
authors.initials: X
authors.lastname: Sun
authors.forename: Yang
authors.initials: Y
authors.lastname: Zhang
authors.forename: Nengqin
authors.initials: N
authors.lastname: Jia
mesh_terms: D015082:2,2'-Dipyridyl / Q000031:analogs & derivatives / Q000737:chemistry; D000538:Aluminum Silicates / Q000737:chemistry*; D000077215:Clay; D055664:Electrochemical Techniques; D004566:Electrodes; D006046:Gold / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000032:analysis; D008163:Luminescent Measurements; D053768:Metal Nanoparticles / Q000737:chemistry*; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure; D009942:Organometallic Compounds / Q000737:chemistry; D010084:Oxidation-Reduction; D011437:Propylamines / Q000032:analysis
chemical_list: D000538:Aluminum Silicates; D009942:Organometallic Compounds; D011437:Propylamines; C103599:bis(bipyridyl)ruthenium(II); C096226:tripropylamine; D015082:2,2'-Dipyridyl; D006046:Gold; D006861:Hydrogen Peroxide; D000077215:Clay