期刊
NANOSCALE
卷 7, 期 18, 页码 8495-8502出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nr00527b
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资金
- National Natural Science Foundation of China [21271093, 81171337, 21431002]
- National Basic Research Program of China (973 Program) [2012CB933102]
- Program for New Century Excellent Talents in University [NCET-13-0262]
- Fundamental Research Funds for the Central Universities [lzujbky-2014-k06]
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 Hg2+. 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 Hg2+ 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%).
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