Citation: YAN Xin-Rui, LI Jun, KONG Long-Fei, LI Meng-Ya, LI Hong-Li, QIAN Cheng, WANG Meng, ZHANG Xue-Fei, YAN Lu, HAN Jin-Yan, GU Wen-Xiu, YANG Hong-Yu, KANG Ze-Kun, XIAO Feng-Juan. AuNPs/g-C₃N₄/BiOCl_0.5Br_0.5 Heterojunction Sensitizing Sensor for Photoelectrochemical Sensing of 2-Chloroethyl Phosphoric Acid[J]. Chinese Journal of Analytical Chemistry, ;2021, 49(5): 798-808. doi: 10.19756/j.issn.0253-3820.201548 shu

AuNPs/g-C₃N₄/BiOCl_0.5Br_0.5 Heterojunction Sensitizing Sensor for Photoelectrochemical Sensing of 2-Chloroethyl Phosphoric Acid

Hebei Provincial Key Laboratory of New Materials for the Coordinated Development of Transportation Engineering and Environment, School of Materials Science and Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China

Corresponding author: XIAO Feng-Juan, xfj66@126.com
Received Date: 7 September 2020
Revised Date: 1 February 2021

Fund Project: Supported by the Natural Science Foundation of Hebei Province, China (No.B2014210014), the Key Research and Development Project of Hebei Province, China (No.18273702D) and the Innovation and Entrepreneurship Training Project of Shijiazhuang Tiedao University.

A new strategy by combining graphite phase carbon nitride/non-integral bismuth oxychloride/bismuth oxybromide (g-C₃N₄/BiOCl_0.5Br_0.5) heterojunction and the plasma resonance effect of gold nanoparticles (AuNPs) was used to construct a novel AuNPs/g-C₃N₄/BiOCl_0.5Br_0.5/ITO sensitized photoelectrochemical sensors for rapid and sensitive detection of the plant hormone 2-chloroethyl phosphate (ETH). The morphology of the as-prepared materials and characteristics of electrode film was characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), energy dispersive spectroscopy (EDS), and the photoelectrochemical response of the sensor to ETH was studied via electrochemical impedance spectroscopy (EIS) and current-time curve (i-t) methods. Density functional theory (DFT) was used to calculate the charge density of atoms in the g-C₃N₄/BiOCl_0.5Br_0.5 heterojunction, the electronic transition mechanism was analyzed, and the sensor's sensitization mechanism was further proposed. Under the optimal conditions, ETH concentration had a good linear relationship with photocurrent in the range of 20.00 nmol/L-63.00 μmol/L. The AuNPs/g-C₃N₄/BiOCl_0.5Br_0.5/ITO sensor exhibited high stability and high reproducibility. This study provided a feasible strategy for rapid and efficient detection of ETH, as well as a new sensing platform for detection of other plant hormones.
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AuNPs/g-C3N4/BiOCl0.5Br0.5 Heterojunction Sensitizing Sensor for Photoelectrochemical Sensing of 2-Chloroethyl Phosphoric Acid

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通讯作者: 陈斌, bchen63@163.com

AuNPs/g-C₃N₄/BiOCl_0.5Br_0.5 Heterojunction Sensitizing Sensor for Photoelectrochemical Sensing of 2-Chloroethyl Phosphoric Acid