Citation: Fang Fang Peng, Yu Zhang, Ning Gu. Size-dependent peroxidase-like catalytic activity of Fe₃O₄nanoparticles[J]. Chinese Chemical Letters, ;2008, 19(6): 730-733. doi: 10.1016/j.cclet.2008.03.021 shu

Size-dependent peroxidase-like catalytic activity of Fe₃O₄nanoparticles

Fang Fang Peng ^a,b,c, ,
Yu Zhang ^a,b ,
Ning Gu ^a,b

a State Key Laboratory of Bioelectronics, Southeast University, Nanjing 210096, China;
b Jiangsu Laboratory for Biomaterials and Devices, Southeast University, Nanjing 210096, China;
c School of Chemistry and Chemical Engineering, Southeast University, Nanjing 210096, China

Received Date: 25 December 2007

Fund Project: This work was supported by the National Natural Science Foundation of China (Nos. 90406023 and 60571031) and

Peroxidase-like catalytic properties of Fe₃O₄ nanoparticles (NPs) with three different sizes, synthesized by chemical coprecipitation and sol-gel methods, were investigated by UV-vis spectrum analysis. By comparing Fe₃O₄NPs with average diameters of 11,20, and 150 nm, we found that the catalytic activity increases with the reduced nanoparticle size. The electrochemical method to characterize the catalytic activity of Fe₃O₄ NPs using the response currents of the reaction product and substrate was also developed.
- Fe₃O₄ nanoparticles,
- Peroxidase-like catalytic activity,
- Electrochemistry
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