Highly dispersed AuPd alloy nanoparticles immobilized on UiO-66-NH2 metal-organic framework for the detection of nitrite. (20th November 2016)

• Record Type: Journal Article
• Authors: Yang, Juan; Yang, Lite; Ye, Huili; Zhao, Faqiong; Zeng, Baizhao
• Is Part Of: Electrochimica acta. Volume 219(2016)
• Page Start: 647
• Page End: 654
• Publication Date: 2016-11-20
• Subjects: AuPd -- alloy nanoparticle -- metal–organic framework -- nitrite -- electrochemical sensor; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2016.10.071
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: In this work, highly dispersed AuPd alloy nanoparticles (NPs, 3–6 nm) decorated amino-functionalized Zr(IV)-based metal–organic framework (i.e. UiO-66-NH2 ) was prepared via a novel adsorption/reduction method in ethanol-water solution. In this process, the UiO-66-NH2 acted as both supporting platform and protective agent. The pores of UiO-66-NH2 could limit the aggregation and migration of AuPd alloy NPs. The resulting AuPd/UiO-66-NH2 catalyst possessed large specific surface area and excellent stability and dispersity in aqueous media. When it was used to construct a nitrite sensor, the composite material exhibited higher catalytic activity than the metal counterparts (i.e., Au/UiO-66-NH2 and Pd/UiO-66-NH2 ) due to the strong metallic synergistic effect. The electrochemical study demonstrated that the AuPd/UiO-66-NH2 based sensor had an extended linear response concentration range of 0.05–5666 μ M for nitrite detection, with a detection limit of 0.01 μ M. It was successfully applied to determine nitrite in sausage and pickle samples.