The novel nanozyme-based electrochemical-driven electrochromic visual biosensor based on PEDOT:PSS/RGO conductive film for rapid detection of nitrite in food samples

被引：0

作者：

Guan, Huanan ^{[1
,2
]}

Chen, Yanyu ^{[2
]}

Wang, Dongxu ^{[1
]}

Liu, Qing ^{[1
]}

Zhong, Jianjun ^{[1
]}

Zhang, Zhihong ^{[1
]}

Lu, Dingding ^{[3
]}

机构：

[1] Jiangsu Univ Sci & Technol, Sch Gain Sci & Technol, Zhenjiang 212000, Peoples R China

[2] Harbin Univ Commerce, Coll Food Engn, Harbin 150076, Peoples R China

[3] Zhenjiang Coll, Zhenjiang 212028, Peoples R China

来源：

FOOD CHEMISTRY | 2025年 / 481卷

基金：

黑龙江省自然科学基金; 中国国家自然科学基金;

关键词：

Food analysis; Electrochemical; Nitrite; Nanozyme; Smartphone colorimetry; Electrochromic; GRAPHENE OXIDE; SOLAR-CELLS; COMPOSITES;

D O I：

10.1016/j.foodchem.2025.143971

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

An efficient and facile nitrite (NO2- ) detection system was developed using Fe3O4@Au-Cu/MOF, which was manufactured through self-assembly as the nanozyme, and a PEDOT:PSS/RGO thin film produced by chemical synthesis as the counter electrode, in conjunction with smartphone-based colorimetry. The Fe3O4@Au-Cu/MOF nanozyme exhibits remarkable catalytic efficiency and can significantly enhance the conversion of NO2- . PEDOT: PSS/RGO films exhibit outstanding electron transport and electrochromic properties. The color of PEDOT:PSS/ RGO films can be modified by applying voltage and the electronic current generated by NO2- within the reaction system. The colorimetric assessment of film color alteration using a smartphone, supplemented by electrochemical validation. Under ideal conditions, the sensor detected NO2- within a linear range of 0.01 to 100 mmol/ L and exhibited a detection limit of 3.37 mu mol/L. This method demonstrated no significant difference compared to the results obtained using the electrochemical method and was effectively employed for the detection of NO2- in real samples.

引用

页数：15

共 81 条

[1] Solid-State rGO-PEDOT:PSS Transducing Material for Cost-Effective Enzymatic Sensing [J].