AuNPs/g-C3N4/BiOCl0.5Br0.5异质结增敏传感器对2-氯乙基磷酸的光电化学传感

引用本文: 闫鑫蕊, 李君, 孔龙飞, 李梦雅, 李红丽, 钱程, 王猛, 张雪菲, 闫璐, 韩金言, 顾文秀, 杨宏郁, 康泽坤, 肖凤娟. AuNPs/g-C₃N₄/BiOCl_0.5Br_0.5异质结增敏传感器对2-氯乙基磷酸的光电化学传感[J]. 分析化学, 2021, 49(5): 798-808. doi: 10.19756/j.issn.0253-3820.201548 shu

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异质结增敏传感器对2-氯乙基磷酸的光电化学传感

石家庄铁道大学材料科学与工程学院, 河北省交通工程与环境协同发展新材料重点实验室, 石家庄 050043

通讯作者: 肖凤娟,E-mail:xfj66@126.com

基金项目:
河北省自然科学基金项目（No.B2014210014）、河北省重点研发计划项目（No.18273702D）和石家庄铁道大学大学生创新创业训练项目资助。

摘要: 利用石墨相氮化碳/非整比氯-溴化氧铋（g-C₃N₄/BiOCl_0.5Br_0.5）异质结协同金纳米粒子（AuNPs）的等离子共振效应，构建了AuNPs/g-C₃N₄/BiOCl_0.5Br_0.5/ITO增敏光电化学传感器，用于植物激素2-氯乙基磷酸（ETH）的快速、灵敏检测。采用扫描电镜（SEM）、X射线衍射（XRD）、能谱分析（EDS）等方法对AuNPs/g-C₃N₄/BiOCl_0.5Br_0.5材料的形貌、结构、膜电极特性进行了分析；采用电化学阻抗（EIS）、电流-时间曲线（i-t）等方法研究了传感器对ETH的光电化学响应。基于密度泛函理论（DFT）计算了g-C₃N₄/BiOCl_0.5Br_0.5中原子的电荷密度，分析了异质结电子跃迁机制和传感器的增敏作用机理。传感器瞬态电流与ETH的浓度在20.00 nmol/L-63.00 μmol/L范围内呈良好的线性关系，传感器具有良好的选择性、稳定性和准确度。本研究为快速、灵敏检测ETH提供了可行方案，也为构建同类植物激素传感平台提供了新的策略和思路。

关键词:

English

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: 07 September 2020
Revised Date: 01 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.

Abstract: 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.

Key words:

Graphite phase carbon nitride
/ Non-integral bismuth oxychloride/bismuth oxybromide
/ Sensitized photoelectrochemical sensor
/ Density functional
/ Selectivity
/ 2-Chloroethyl phosphoric acid

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沈阳化工大学材料科学与工程学院沈阳 110142

AuNPs/g-C₃N₄/BiOCl_0.5Br_0.5异质结增敏传感器对2-氯乙基磷酸的光电化学传感

通讯作者: 肖凤娟,E-mail:xfj66@126.com

English

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

Corresponding author: XIAO Feng-Juan, xfj66@126.com

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