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Chemically tailoring graphene oxides into fluorescent nanosheets for Fe3+ ion detection

2012; Elsevier BV; Volume: 50; Issue: 6 Linguagem: Inglês

10.1016/j.carbon.2012.01.021

1873-3891

Dong Wang, Lei Wang, Xinyi Dong, Zhun Shi, Jian Jin,

Graphene research and applications

A method is presented to tailor the lateral size of graphene oxide (GO) in the range of 10–100 nm and simultaneously tailor its edge structure by oxidation with periodic acid in a one-pot process. The obtained GO nanosheets are photoluminescent and exhibit lateral size-dependent behavior. The emission wavelength could be tuned from 550 to 470 nm by decreasing the lateral size. The fluorescence of GO nanosheets shows a sensitive and selective quenching effect to Fe3+ ions, allowing it to be used as a fluorescent probe to detect Fe3+ ions with a detection limit of 1 ppm.