分析化学2025，Vol.53Issue(3)：364-374,11.DOI:10.19756/j.issn.0253-3820.251001
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
Development of Bismuth Iodide Oxide/Nitrogen-doped Graphene Quantum Dots-based Photoelectrochemical Sensor for Determination of Chlorpyrifos
摘要
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.关键词
光电化学传感器/碘氧化铋/氮掺杂石墨烯量子点/毒死蜱/晶面调节/异质结Key words
Photoelectrochemical sensor/Bismuth iodide oxide/Nitrogen doped graphene quantum dots/Chlorpyrifos/Crystal plane regulation/Heterojunction引用本文复制引用
陈亚飞,章旭辉,杨光炜,魏小平,李建平..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[J].分析化学,2025,53(3):364-374,11.基金项目
国家自然科学基金项目(No.22264010)资助. Supported by the National Natural Science Foundation of China(No.22264010). （No.22264010）
