A nano-silver modified heterojunction of bismuth sulfide nanoflowers-titania nanorods for sensitively detecting alpha-fetoprotein
文献类型： 外文期刊
作者： Liu, Jia 1 ; Jing, Tao 1 ; Qi, Haiyan 1 ; Zhao, Yunpeng 1 ; Wu, Min 3 ;
作者机构： 1.Qiqihar Univ, Coll Chem & Chem Engn, 42 Wenhua St, Qiqihar 161006, Peoples R China
2.Qiqihar Univ, Heilongjiang Prov Key Lab Surface Act Agent & Auxi, Qiqihar 161006, Peoples R China
3.Chinese Acad Trop Agr Sci, Inst Trop Biotechnol, Haikou 571101, Peoples R China
期刊名称：NEW JOURNAL OF CHEMISTRY （ 影响因子：2.5； 五年影响因子：2.7 ）
ISSN： 1144-0546
年卷期： 2025 年 49 卷 19 期
页码：
收录情况： SCI
摘要： Developing rapid and sensitive photoelectrochemical (PEC) platforms for detecting alpha-fetoprotein (AFP) is of utmost importance. A PEC aptasensor system was constructed in this investigation to specifically detect AFP. The visible light-active materials employed in this system include nano-Ag/bismuth sulfide (Bi2S3)/TiO2 nanorod arrays (NRAs), while the recognition element used is the AFP aptamer. The created p-n heterojunction by loading Bi2S3 on TiO2 NRAs facilitated efficient separation of electron-hole pairs. Finally, the integration of nano-Ag onto the Bi2S3/TiO2 NRA heterojunction induced surface plasmon resonance (SPR), leading to an intriguing Z-scheme mechanism that expanded the spectrum of light absorption and enhanced electron transfer efficiency. This resulted in an expanded visible light absorption range, improving the photoresponsivity of the PEC sensor. In the concentration range of 0.002 ng mL-1 to 100 ng mL-1, the platform exhibited excellent selectivity and successfully detected concentrations as low as 5.1 pg mL-1 (S/N = 3). With its distinctive design, this sensor demonstrates the ability to identify AFP in human serum.
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