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A Double-Deck Structure of Reduced Graphene Oxide Modified Porous Ti3C2Tx Electrode towards Ultrasensitive and Simultaneous Detection of Dopamine and Uric Acid

文献类型： 外文期刊

作者： Zhu, Yangguang 1 ; Tian, Qichen 3 ; Li, Xiufen 1 ; Wu, Lidong 4 ; Yu, Aimin 5 ; Lai, Guosong 6 ; Fu, Li 7 ; Wei, Qiuping 8 ; Dai, Dan 2 ; Jiang, Nan 2 ; Li, He 2 ; Ye, Chen 2 ; Lin, Cheng-Te 2 ;

作者机构： 1.Jiangnan Univ, Sch Environm & Civil Engn, Lab Environm Biotechnol, Wuxi 214122, Peoples R China

2.Chinese Acad Sci, Ningbo Inst Mat Technol & Engn NIMTE, Key Lab Marine Mat & Related Technol, Zhejiang Key Lab Marine Mat & Protect Technol, Ningbo 315201, Peoples R China

3.Zhejiang Univ Technol, Coll Chem Engn, Hangzhou 310032, Peoples R China

4.Chinese Acad Fishery Sci, Key Lab Control Qual & Safety Aquat Prod, Beijing 100141, Peoples R China

5.Swinburne Univ Technol, Fac Sci Engn & Technol, Dept Chem & Biotechnol, Hawthorn, Vic 3122, Australia

6.Hubei Normal Univ, Dept Chem, Huangshi 435002, Peoples R China

7.Hangzhou Dianzi Univ, Coll Mat & Environm Engn, Hangzhou 310018, Peoples R China

8.Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China

9.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China

关键词： reduced graphene oxide; Ti3C2Tx; dopamine; uric acid; double deck

期刊名称：BIOSENSORS-BASEL （ 影响因子：5.743； 五年影响因子：5.972 ）

ISSN：

年卷期： 2021 年 11 卷 11 期

页码：

收录情况： SCI

摘要： Considering the vital physiological functions of dopamine (DA) and uric acid (UA) and their coexistence in the biological matrix, the development of biosensing techniques for their simultaneous and sensitive detection is highly desirable for diagnostic and analytical applications. Therefore, Ti3C2Tx/rGO heterostructure with a double-deck layer was fabricated through electrochemical reduction. The rGO was modified on a porous Ti3C2Tx electrode as the biosensor for the detection of DA and UA simultaneously. Debye length was regulated by the alteration of rGO mass on the surface of the Ti3C2Tx electrode. Debye length decreased with respect to the rGO electrode modified with further rGO mass, indicating that fewer DA molecules were capable of surpassing the equilibrium double layer and reaching the surface of rGO to achieve the voltammetric response of DA. Thus, the proposed Ti3C2Tx/rGO sensor presented an excellent performance in detecting DA and UA with a wide linear range of 0.1-100 mu M and 1-1000 mu M and a low detection limit of 9.5 nM and 0.3 mu M, respectively. Additionally, the proposed Ti3C2Tx/rGO electrode displayed good repeatability, selectivity, and proved to be available for real sample analysis.

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