Z-scheme Bi2O3/CuBi2O4 heterojunction enabled sensitive photoelectrochemical detection of aflatoxin B1 for health care, the environment, and food

文献类型： 外文期刊

第一作者： Chen, Xiao

作者： Chen, Xiao;Wu, Huimin;Chen, Xiao;Wu, Huimin;Chen, Xiao;Wu, Wenqin;Zhang, Qi;Zhang, Zhaowei;Wang, Cheng;Fan, Yingying;Zhang, Zhaowei;Wu, Huimin

作者机构：

关键词： Z-scheme photocatalyst; Density functional theory; Photoelectrochemical biosensor; Health care; Environmental monitoring; Food safety

期刊名称：BIOSENSORS & BIOELECTRONICS （ 影响因子：12.545； 五年影响因子：10.722 ）

ISSN： 0956-5663

年卷期： 2022 年 214 卷

页码：

收录情况： SCI

摘要： Designing a photoelectrochemical (PEC) biosensor with preponderant sensitivity and anti-interference is a challenge for detecting small molecules in real samples with complex matrices. To this end, the Bi2O3/CuBi2O4 was synthesized in one step to enhance visible light's absorption ability, transferring the interfacial carrier's efficiency, a high-active Z-scheme heterojunction, and a photocathode biosensor was proposed. For the first time, we used the density functional theory to verify a Z-scheme transfer pathway of photogenerated electrons in Bi2O3/CuBi2O4 and the energy band structure of Bi2O3 and CuBi2O4, respectively. Bi2O3/CuBi2O4-based PEC biosensor was developed for competive immunoassay of small molecular, aflatoxin B1 (AFB1) as an example, resulting in a low detection limit of 297.4 fg/mL and a linear range of 1.4 pg/mL-280 ng/mL in urine, water, peanut, and wheat samples. Using spiked experiments, the satisfied repeatability, reproducibility, stability, and specificity of the Bi2O3/CuBi2O4-based PEC biosensor indicated a promise for application in health care, the environment, and food.

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[1]Z-scheme Bi2O3/CuBi2O4 heterojunction enabled sensitive photoelectrochemical detection of aflatoxin B1 for health care, the environment, and food. Chen, Xiao,Wu, Huimin,Chen, Xiao,Wu, Huimin,Chen, Xiao,Wu, Wenqin,Zhang, Qi,Zhang, Zhaowei,Wang, Cheng,Fan, Yingying,Zhang, Zhaowei,Wu, Huimin. 2022

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