An Electrochemical Sensor Based on Longan Shell-derived Carbon Materials for the Detection of Uric Acid
HEI Yashuang1,2,*, WANG Yahui1,2, XING Cuijuan1,2, LI Weitao1,2, GUO Huanhuan2, ZHAO Zhiju1,2, LIU Yongzheng1,2
1 Functional Polymer Materials Research and Development and Engineering Application Technology Innovation Center of Hebei Province, Xingtai University, Xingtai 054001, Hebei, China 2 School of Chemical Engineering and Biotechnology, Xingtai University, Xingtai 054001, Hebei, China
Abstract: Biomass materials, which are widely available in nature, have attracted significant attention due to their low cost, environmental friendliness, and renewability. Carbon materials derived from biomass can effectively enhance the catalytic oxidation performance of electrochemical sensors. To prepare low-cost and environmentally friendly electrode modification materials, three-dimensional porous carbon materials (3D-LGSPZs) were synthesized using waste longan shells as raw materials through hydrothermal carbonization combined with freeze-drying technology. The electrochemical performance of bare glassy carbon (GC) electrodes and 3D-LGSPZs-modified GC electrodes was evaluated using cyclic voltammetry in a potassium ferricyanide solution as the electrolyte. The results revealed that, compared to the GC electrode, the 3D-LGSPZs/GC electrode exhibited superior electrochemical performance, including a larger oxidation current, a wider linear range (5—560 μmol/L and 560—2 620 μmol/L), higher sensitivity (454.03 μA·mmol/(L·cm2) and 316.55 μA·mmol/(L·cm2), a lower oxidation potential (negative shift of 104 mV), a lower detection limit (0.27 μmol/L), as well as enhanced stability and anti-interference capability. The electrochemical sensing platform based on 3D-LGSPZs/GC successfully achieved the detection of UA content in simulated human urine and saliva, yielding satisfactory results. When AA, DA, and UA coexisted, the 3D-LGSPZs/GC electrode demonstrated distinct oxidation peaks corresponding to the three substances, unlike the GC electrode, proving the feasibility of simultaneously detecting AA, DA, and UA. This highlights the broad application prospects of longan shell-derived carbon materials as electrode modification materials for constructing electrochemical sensing platforms to detect small biological molecules.
黑亚双, 王亚晖, 邢翠娟, 李伟涛, 郭焕焕, 赵治巨, 刘永正. 基于桂圆壳衍生的碳材料构筑电化学传感器用于尿酸检测[J]. 材料导报, 2026, 40(3): 24120112-7.
HEI Yashuang, WANG Yahui, XING Cuijuan, LI Weitao, GUO Huanhuan, ZHAO Zhiju, LIU Yongzheng. An Electrochemical Sensor Based on Longan Shell-derived Carbon Materials for the Detection of Uric Acid. Materials Reports, 2026, 40(3): 24120112-7.
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