Recently, Pengcheng Yan published the latest research work titled “Enhanced photoelectrochemical aptasensing triggered by nitrogen deficiency and cyano group simultaneously engineered 2D carbon nitride for sensitively monitoring atrazine” (Biosens. Bioelectron., 2022, 148, 111802) online in Biosensors and Bioelectronics (Top journal of international engineering science and technology, IF=10.618). Jiangsu University is the first completed department of this paper, Pengcheng Yan is the first author, Yucheng Jin and Henan Li are the corresponding authors.
Determination of atrazine (ATZ) residues in aquatic environment has important theoretical and practical significance for protecting the ecological environment and ensuring human health. A photoelectrochemical (PEC) aptasensing based on nitrogen deficiency and cyano group simultaneously engineered two-dimensional (2D) carbon nitride (named as DCN) has been proposed for sensitively detecting ATZ. The introduction of nitrogen deficiency can narrow band gap of DCN, leading to positive position of intermediate electronic state, and improving the absorption of visible light. The intermediate electronic state can function as an electron trap to promote the separation and migration of photogenerated carriers. Cyano groups can trap photoinduced electrons and suppress charge recombination. Gas produced by thermal decomposition has a tailoring effect, endowing DCN with 2D ultra-thin structure, which shortens transmission path of carriers. The synergistic effect of the above enhances PEC performance of DCN. The PEC aptasensing exhibited a wide linear range of 1.0×10−4 to 1.0×103 pM and a low detection limit of 3.33×10−5 pM with excellent selectivity, stability, and satisfactory accuracy during detecting real samples. The proposed design of carbon nitride-based materials may provide a better understanding of the relationship between kind of photoactive materials and PEC performance.
The research work is financed by the National Natural Science Foundation of China, China Postdoctoral Science Foundation, Jiangsu Province Post-doctoral Science Foundation, High-tech Research Key laboratory of Zhenjiang, a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions, Six Talent Peaks Project of Jiangsu Province.
