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Thiolated poly(aspartic acid)-functionalized two-dimensional MoS2, chitosan and bismuth film as a sensor platform for cadmium ion detection

文献类型： 外文期刊

作者： Cao, Qiang 1 ; Xiao, Yushi 1 ; Huang, Rong 1 ; Liu, Na 1 ; Chi, Hai 4 ; Lin, Cheng-Te 5 ; Huang, Chi-Hsien 6 ; Han, Gang; 1 ;

作者机构： 1.Chinese Acad Fishery Sci, Key Lab Control Qual & Safety Aquat Prod, Beijing 100141, Peoples R China

2.Shanghai Ocean Univ, Shanghai 201306, Peoples R China

3.Beijing Technol & Business Univ BTBU, Beijing Engn & Technol Res Ctr Food Addit, Beijing 100048, Peoples R China

4.Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, Shanghai 201306, Peoples R China

5.Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China

6.Mingchi Univ Technol, Dept Mat Engn, Taipei 243303, Taiwan

期刊名称：RSC ADVANCES （ 影响因子：3.361； 五年影响因子：3.39 ）

ISSN：

年卷期： 2020 年 10 卷 62 期

页码：

收录情况： SCI

摘要： In this work, a sensitive electrochemical platform for determination of cadmium ions (Cd2+) is obtained using thiolated poly(aspartic acid) (TPA)-functionalized MoS2 as a sensor platform by differential pulse anodic stripping voltammetry (DPASV). The performance of the TPA-MoS2-modified sensor is systemically studied. It demonstrates that the TPA-MoS2 nanocomposite modified sensor exhibits superior analytical performance for Cd2+ over a linear range from 0.5 mu g L-1 to 50 mu g L-1, with a detection limit of 0.17 mu g L-1. Chitosan is able to form a continuous coating film on the surface of the GC electrode. The good sensing performance of the TPA-MoS2-modified sensor may be attributed to the following factors: the large surface area of MoS2 (603 m(2) g(-1)), and the abundant thiol groups of TPA. Thus, the TPA-MoS2-modified sensor proves to be a reliable and environmentally friendly tool for the effective monitoring of Cd2+ existing in aquacultural environments.

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