Development of Bismuth Iodide Oxide/Nitrogen-doped Graphene Quantum Dots-based Photoelectrochemical Sensor for Determination of Chlorpyrifos
10.19756/j.issn.0253-3820.251001
- VernacularTitle:碘氧化铋/氮掺杂石墨烯量子点光电化学传感器的研制及毒死蜱测定
- Author:
Ya-Fei CHEN
1
;
Xu-Hui ZHANG
;
Guang-Wei YANG
;
Xiao-Ping WEI
;
Jian-Ping LI
Author Information
1. 桂林理工大学化学与生物工程学院,桂林 541004
- Keywords:
Photoelectrochemical sensor;
Bismuth iodide oxide;
Nitrogen doped graphene quantum dots;
Chlorpyrifos;
Crystal plane regulation;
Heterojunction
- From:
Chinese Journal of Analytical Chemistry
2025;53(3):364-374
- CountryChina
- Language:Chinese
-
Abstract:
Bismuth iodide(BiOI)with different crystal plane ratios of(110)to(001)was synthesized,and typeⅡheterojunction formed between(001)and(110)crystal planes of BiOI was used to improve the separation efficiency of photogenerated electrons and holes.Then the BiOI(001)/(110)was composited with nitrogen-doped graphene quantum dots(N-GQDs)to prepare a ternary composites,which could enhance the range and intensity of light absorption,and prolonged the lifetime of photogenerated electrons due to the formation of Z-scheme heterojunctions between BiOI and N-GQDs,thereby leading to the excellent photoelectric performance of the BiOI/N-GQDs for generating sensitive photoelectric response signals.A photoelectrochemical sensor for sensitive detection of chlorpyrifos(CPF)was designed with BiOI/N-GQDs-modified FTO electrode as a photocathode.The S and N atoms contained in CPF were coordinated with Bi(Ⅲ)on the surface of BiOI,which reduced the photocurrent of BiOI/N-GQDs.The photocurrent change was linear with logarithm of concentration of CPF in the range of 1.5×10-12-5.0×10-9 mol/L,and the detection limit was 1.5×10-12 mol/L.The sensor was highly sensitive,selective and stable,and could be used for determination of trace CPF in environmental and food samples.
