A strongly coupled Au/Fe3O4/GO hybrid material with enhanced nanozyme activity for highly sensitive colorimetric detection, and rapid and efficient removal of Hg(2+) in aqueous solutions

Shouting Zhang; Hua Li; Zhiyi Wang; Jian Liu; Haoli Zhang; Baodui Wang; Zhengyin Yang

doi:10.1039/c5nr00527b

A strongly coupled Au/Fe3O4/GO hybrid material with enhanced nanozyme activity for highly sensitive colorimetric detection, and rapid and efficient removal of Hg(2+) in aqueous solutions

Nanoscale. 2015 May 14;7(18):8495-502. doi: 10.1039/c5nr00527b.

Authors

Shouting Zhang¹, Hua Li, Zhiyi Wang, Jian Liu, Haoli Zhang, Baodui Wang, Zhengyin Yang

Affiliation

¹ Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry, and Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou University Gansu, Lanzhou, 730000, People's Republic of China. wangbd@lzu.edu.cn yangzy@lzu.edu.cn.

PMID: 25896803
DOI: 10.1039/c5nr00527b

Abstract

We have developed an efficient strategy for synthesizing a strongly coupled Au/Fe3O4/GO hybrid material to improve the catalytic activity, stability, and separation capability of Au nanoparticles (NPs) and Hg(2+). The hybrid material can be synthesized by the direct anchoring of Au and Fe3O4 NPs on the functional groups of GO. This approach affords strong chemical attachments between the NPs and GO, allowing this hybrid material to ultrasensitively detect Hg(2+) in aqueous solutions with a detection limit as low as 0.15 nM. In addition, the deposition of Hg(0) on the surface of Au/Fe3O4/GO could be quickly (within 30 min) and efficiently (>99% elimination efficiency) removed by the simple application of an external magnetic field and then Au/Fe3O4/GO could be subsequently reused at least 15 times, with the elimination efficiency remaining high (>96%).

Publication types

Research Support, Non-U.S. Gov't