Preparation of Graphene Oxide Decorated Fe3O4@SiO2 Nanocomposites with Superior Adsorption Capacity and SERS Detection for Organic DyesReportar como inadecuado




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Journal of Nanomaterials - Volume 2015 2015, Article ID 817924, 8 pages -

Research Article

Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials and Key Laboratory for the Synthesis and Application of Organic Functional, Molecules of Ministry of Education and College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China

School of Textile Science and Engineering, Wuhan Textile University, Wuhan 430073, China

Institute for Frontier Materials, Deakin University, Geelong, VIC 3216, Australia

Received 23 July 2015; Revised 19 September 2015; Accepted 28 September 2015

Academic Editor: Giuseppe Compagnini

Copyright © 2015 Song Yang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The fast detection and removal of organic dyes from contaminated water has become an urgent environmental issue due to their high toxicity, chemical stability, and low biodegradability. In this paper, we have developed graphene oxide decorated Fe3O4@SiO2 Fe3O4@SiO2-GO as a novel adsorbent aiming at the rapid adsorption and trace analysis of organic dyes followed by surface enhanced Raman scattering SERS. The structure and morphology of the nanocomposites were characterized by transmission electron microscopy TEM, Fourier infrared spectrometry FT-IR, X-ray diffraction XRD, and vibrating sample magnetometer VSM. The obtained nanocomposites were used to adsorb methylene blue MB in aqueous solution based on π-π stacking interaction and electrostatic attraction between MB and GO, and the adsorption behaviors of MB were investigated. Moreover, the obtained nanocomposites with adsorbed dyes were separated from the solution and loaded with silver nanoparticles for SERS detection. These nanocomposites showed superior SERS sensitivity and the lowest detectable concentration was 1.0 × 10

 M.





Autor: Song Yang, Tian Zeng, Yaling Li, Jun Liu, Qian Chen, Ji Zhou, Yong Ye, and Bin Tang

Fuente: https://www.hindawi.com/



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