Citation: Jie Zhou, Chuanxiang Zhang, Changchun Hu, Shuo Li, Yuan Liu, Zhu Chen, Song Li, Hui Chen, Rokayya Sami, Yan Deng. Electrochemical aptasensor based on black phosphorus-porous graphene nanocomposites for high-performance detection of Hg²⁺[J]. Chinese Chemical Letters, ;2024, 35(11): 109561. doi: 10.1016/j.cclet.2024.109561 shu

Electrochemical aptasensor based on black phosphorus-porous graphene nanocomposites for high-performance detection of Hg²⁺

Jie Zhou ^{a, b, c, 1} ,
Chuanxiang Zhang ^{c, d, 1} ,
Changchun Hu ^c ,
Shuo Li ^c ,
Yuan Liu ^{a, b} ,
Zhu Chen ^{a, b, c} ,
Song Li ^{a, b, c} ,
Hui Chen ^{a, b, c} ,
Rokayya Sami ^e ,
Yan Deng ^{a, b, c, *,}

a.
Hengyang Medical School, University of South China, Hengyang 421001, China
b.
Institute for Future Sciences, University of South China, Changsha 410000, China
c.
Hunan Key Laboratory of Biomedical Nanomaterials and Devices, Hunan University of Technology, Zhuzhou 412007, China
d.
College of Packing and Materials Engineering, Hunan University of Technology, Zhuzhou 412007, China
e.
Department of Food Science and Nutrition, College of Sciences, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia

hndengyan@126.com

Received Date: 19 November 2023
Revised Date: 23 January 2024
Accepted Date: 25 January 2024
Available Online: 26 January 2024

Figures(4)

A novel approach was developed to fabricate a label-free electrochemical aptasensor for specific detection of mercury ions (Hg²⁺). This involved modifying polylysine (PLL)-coated black phosphorus-porous graphene (BP-PG) nanocomposites (PLL/BP-PG) onto the surface of glassy carbon electrodes (GCE), which were further modified with gold nanoparticles (AuNPs) to combine with a thiolated aptamer (Apt) capable of specifically recognizing Hg²⁺. BP-PG was synthesized using the solvothermal method and covalently bonded to form BP-PG nanosheets, resulting in significant enhanced electrochemical properties of the PLL/BP-PG composite. Furthermore, the PLL/BP-PG composite was improved environmental stability of BP and provided a considerable quantity of -NH₂ for bonding to AuNPs firmly by assembling. The physical properties and electrochemical behavior of the substrate materials were investigated using various characterization techniques, and analytical parameters were optimized. It is shown that, the Apt/AuNPs/PLL/BP-PG/GCE had a linear response (R² = 0.999) with good selectivity and high sensitivity over the Hg²⁺ range of 1–10,000 nmol/L. The proposed sensor has a detection limit of 0.045 nmol/L and can be employed for detecting of Hg²⁺. It also obtained satisfying results in river water, soil and vegetable samples.
- Hg²⁺,
- Electrochemical sensor,
- Black phosphorus-porous graphene,
- Aptamer,
- AuNPs
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沈阳化工大学材料科学与工程学院沈阳 110142

Electrochemical aptasensor based on black phosphorus-porous graphene nanocomposites for high-performance detection of Hg2+

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通讯作者: 陈斌, bchen63@163.com

Electrochemical aptasensor based on black phosphorus-porous graphene nanocomposites for high-performance detection of Hg²⁺