一种具有增强纳米酶活性的强耦合金/四氧化三铁/氧化石墨烯杂化材料，用于高灵敏度比色检测以及快速高效去除水溶液中的汞离子（Hg(2+)）。
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.
作者信息
Zhang Shouting, Li Hua, Wang Zhiyi, Liu Jian, Zhang Haoli, Wang Baodui, Yang Zhengyin
机构信息
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.
出版信息
Nanoscale. 2015 May 14;7(18):8495-502. doi: 10.1039/c5nr00527b.
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%).
我们已经开发出一种高效的策略来合成强耦合的金/四氧化三铁/氧化石墨烯杂化材料，以提高金纳米颗粒（NPs）对汞（2+）的催化活性、稳定性和分离能力。这种杂化材料可以通过将金和四氧化三铁纳米颗粒直接锚定在氧化石墨烯的官能团上合成。这种方法在纳米颗粒和氧化石墨烯之间提供了强大的化学连接，使这种杂化材料能够超灵敏地检测水溶液中的汞（2+），检测限低至0.15 nM。此外，通过简单施加外部磁场，可以快速（30分钟内）且高效地（消除效率>99%）去除沉积在金/四氧化三铁/氧化石墨烯表面的汞（0），随后金/四氧化三铁/氧化石墨烯可以至少重复使用15次，消除效率仍然很高（>96%）。
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