Chinese Journal of Applied Chemistry ›› 2018, Vol. 35 ›› Issue (7): 834-841.DOI: 10.11944/j.issn.1000-0518.2018.07.180005

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Synthesis of Iodine Oxygen Bismuth/Titanium Dioxide Nanorod Arrays Composite and Photoelectrochemical Detection of Bisphenol A

Zhenzhen FAN,Lifang FAN,Chuan DONG()   

  1. Institute of Environmental Science,Shanxi University,Taiyuan 030006,China
  • Received:2018-01-08 Accepted:2018-03-22 Published:2018-07-06 Online:2018-07-06
  • Contact: Chuan DONG
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21707082, No.21575084), the Natural Science Foundation of Shanxi Province, China(No.201601D202008)

Abstract:

Iodine oxygen bismuth/titanium dioxide nanorod arrays(BiOI/TiO2 NRAs) composite was synthesized in situ on fluorine-doped tin oxide-coated glass(FTO) substrate by simple two-step hydrothermal method. The composite was characterized by scanning electron microscope and X-ray diffraction. The photoelectrochemical(PEC) behaviors were studied using current-time curve. The combination of BiOI with TiO2 NRAs extends effectively the adsorption of TiO2 to visible region, and the formed p-n heterojunction could contribute to the spatial charge separation as well as the enhanced photocatalytic activity. The PEC sensing platform fabricated by using this composite was applied for detection of bisphenol A(BPA) via the oxidation of BPA by the consumption of photogenerated holes during PEC reaction. Under 420 nm irradiation, current-time curve was used for sensitive detection of BPA at applied potential of 0.0 V, a wide linear work range from 0.0047 to 14.7 μmol/L was obtained with a low detection limit of 0.93 nmol/L(S/N=3). The developed PEC sensor exhibits high sensitivity, good stability and reproducibility. This sensor was also used to evaluate the level of BPA in real samples with good recovery from 98.0% to 107.1%.

Key words: photoelectrochemical, bisphenol A, titanium dioxide nanorod arrays, Iodine oxygen bismuth