Carbon-dot-based dual-emission silica nanoparticles as a ratiometric fluorescent probe for Bisphenol A

Guo-Qiang Xiang; Yue Ren; Yin Xia; Wenjie Mao; Chao Fan; Si-Yu Guo; Pan-Pan Wang; Deng-Hui Yang; Lijun He; Xiuming Jiang

doi:10.1016/j.saa.2017.01.049

Carbon-dot-based dual-emission silica nanoparticles as a ratiometric fluorescent probe for Bisphenol A

Spectrochim Acta A Mol Biomol Spectrosc. 2017 Apr 15:177:153-157. doi: 10.1016/j.saa.2017.01.049. Epub 2017 Jan 25.

Authors

Guo-Qiang Xiang¹, Yue Ren², Yin Xia², Wenjie Mao², Chao Fan², Si-Yu Guo², Pan-Pan Wang², Deng-Hui Yang², Lijun He², Xiuming Jiang²

Affiliations

¹ School of Chemistry and Chemical Engineering, Henan University of technology, Zhengzhou, 450001, PR China. Electronic address: xianggq@haut.edu.cn.
² School of Chemistry and Chemical Engineering, Henan University of technology, Zhengzhou, 450001, PR China.

PMID: 28153813
DOI: 10.1016/j.saa.2017.01.049

Abstract

A simple and effective strategy for designing a ratiometric fluorescent nanosensor is described in this work. A carbon dots (CDs) based dual-emission nanosensor for Bisphenol A (BPA) was prepared by coating CDs on the surface of dye-doped silica nanoparticles. The fluorescence of dual-emission silica nanoparticles was quenched in hydrochloric acid by potassium bromate (KBrO₃) oxidation; BPA inhibited KBrO₃ oxidation, resulting in the ratiometric fluorescence response of dual-emission silica nanoparticles. Several important parameters affecting the performance of the nanosensor were investigated and optimized. The detection limit of this nanosensor was 0.80ng mL^-1 with a linear range from 10 to 500ng mL^-1. This was applied successfully to determine BPA in the leached solution of different plastic products with satisfactory results.

Keywords: Bisphenol A; Carbon dots; Ratiometric fluorescent probe; Silica nanoparticles.