A strongly coupled Au/Fe3O4/GO hybrid material with enhanced nanozyme activity for highly sensitive colorimetric detection, and rapid and efficient removal of Hg2+ in aqueous solutions

被引：137
作者：
Zhang, Shouting [1 ,2 ]
Li, Hua [3 ]
Wang, Zhiyi [1 ,2 ]
Liu, Jian [1 ,2 ]
Zhang, Haoli [1 ,2 ]
Wang, Baodui [1 ,2 ]
Yang, Zhengyin [1 ,2 ]
机构：
[1] Lanzhou Univ Gansu, Key Lab Nonferrous Met Chem & Resources Utilizat, State Key Lab Appl Organ Chem, Minist Educ, Lanzhou 730000, Peoples R China
[2] Lanzhou Univ Gansu, Key Lab Special Funct Mat & Struct Design, Minist Educ, Lanzhou 730000, Peoples R China
[3] Lanzhou Univ, Key Lab Magnetism & Magnet Mat, Minist Educ, Lanzhou 730000, Peoples R China
来源：
NANOSCALE | 2015年 / 7卷 / 18期
基金：
中国国家自然科学基金;
关键词：
PEROXIDASE-LIKE ACTIVITY; GOLD NANOPARTICLES; AU-FE3O4; NANOPARTICLES; FE3O4; GRAPHENE OXIDE; MERCURY; NANOCOMPOSITES; PARTICLES; CATALYST; DELIVERY;
D O I：
10.1039/c5nr00527b
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
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%).
引用
收藏
页码：8495 / 8502
页数：8
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