To achieve ultrasensitive electrochemical detection of mercury ions employing metallic 1T-MoS2 nanosheets
To achieve ultrasensitive electrochemical detection of mercury ions employing metallic 1T-MoS2 nanosheets
复制标题
利用金属1T-MoS2纳米片实现汞离子的超灵敏电化学检测
DOI：
10.1016/j.electacta.2020.136800
复制
发表时间：
2020-09
影响因子：
6.6
通讯作者：
Huanghao Yang
中科院分区：
文献类型：
--
作者：
Jiayong Dai;Le Yao;Xingsu Gao;Shumeng Bai;Xian Chen;Lei Li;Jibin Song;Huanghao Yang
The establishment of analytical methods with superior sensitivity, selectivity, accuracy, and stability, as well as ultralow detection limits inspired a broad range of research enthusiasm. In this work, we developed an electrochemical method for detecting mercury ions using metallic 1T-MoS2nanosheets, which was firstly fabricated using phase engineering strategy and then exfoliated. Remarkably promoted sensitivity and significantly lowered limits of detection (LODs) were achieved due to the dramatically reduced charge transfer resistance of 1T-MoS2nanosheets compared with that of the semiconducting 2H-MoS2nanoflakes. After electrode modification and optimization, working curves for both two materials were obtained. Astonishingly, the LODs of 1T-MoS2modified glassy carbon electrodes (GCEs) was calculated to be 1.54 × 10−19M (DL= 3σ/k), which was six orders of magnitude lower than that of 2H-MoS2(1.46 × 10−13M). And 1T-MoS2-based electrochemical detection method also exhibited superior selectivity towards other ten ions selected because of the high affinity between Hg and S. The stability and reproducibility of the new method was impressive as well, and the recovery rates using spiked real water samples were all in the range of 99.8–101.2% due to the superb sensitivity. All results proved that the metallic 1T-MoS2nanosheets a promising material for electrochemical detection of mercury ions.
登录
查看更多内容
影响因子：
16.6
作者：
Chou, Stanley S.;Kaehr, Bryan;Kim, Jaemyung;Foley, Brian M.;De, Mrinmoy;Hopkins, Patrick E.;Huang, Jiaxing;Brinker, C. Jeffrey;Dravid, Vinayak P.
通讯作者：
Dravid, Vinayak P.
影响因子：
6.7
作者：
Wensi Zhang;Panpan Zhang;Zhiqiang Su;Gang Wei
通讯作者：
Wensi Zhang;Panpan Zhang;Zhiqiang Su;Gang Wei
影响因子：
21.8
作者：
Yifu Yu;Gwang-Hyeon Nam;Qiyuan He;Xue-jun Wu;Kang Zhang;Zhen Yang;Junze Chen;Qinglang Ma;
通讯作者：
Yifu Yu;Gwang-Hyeon Nam;Qiyuan He;Xue-jun Wu;Kang Zhang;Zhen Yang;Junze Chen;Qinglang Ma;
影响因子：
41.2
作者：
Kappera, Rajesh;Voiry, Damien;Chhowalla, Manish
通讯作者：
Chhowalla, Manish
二维 MoS2：一种有前景的生物传感器构建模块
影响因子：
12.6
作者：
Gan, Xiaorong;Zhao, Huimin;Quan, Xie
通讯作者：
Quan, Xie