Sensitive and selective detection of Hg（II） contamination is of great importance with concern of public health. Herein, we successfully fabricated monolayer MoS2 （S-MoS2） decorated Cu7S4-Au （Cu7S4-Au@S-MoS2） nan...Sensitive and selective detection of Hg（II） contamination is of great importance with concern of public health. Herein, we successfully fabricated monolayer MoS2 （S-MoS2） decorated Cu7S4-Au （Cu7S4-Au@S-MoS2） nanocomposite modified electrode for the sensitive and selective detection of Hg（II） via anodic stripping voltammetric technique. Due to the excellent electrocatalytic reduction performance arisen from the abundant active edge sites of small monolayer MoS2 and good affinity of Au toward Hg, the current method displayed high sensitivity （LOD = 190 nmol L-l） and enhanced selectivity. As control, nanostructures including Cu7S4-Au, Cu7S4@S-MoS2 and Cu7S4-Au@M-MoS2 （M： multilayer） were also investigated, but showed low re- sponse to Hg（Ⅱ）, suggesting that both Au domains and active edge sites of monolayer MoS2 have crucial synergistic effects on the high-performance for recognition of Hg（Ⅱ）. Moreover, the developed method displays satisfied performance for the detection of Hg（Ⅱ） in real samples, which indicates its potentials in practical applications.展开更多
基金supported by the National Natural Science Foundation of China(21475007 and 21675009)the Fundamental Research Funds for Central Universities(buctrc201507 and buctrc201608)the support from the "Public Hatching Platform for Recruited Talents of BUCT"
文摘Sensitive and selective detection of Hg（II） contamination is of great importance with concern of public health. Herein, we successfully fabricated monolayer MoS2 （S-MoS2） decorated Cu7S4-Au （Cu7S4-Au@S-MoS2） nanocomposite modified electrode for the sensitive and selective detection of Hg（II） via anodic stripping voltammetric technique. Due to the excellent electrocatalytic reduction performance arisen from the abundant active edge sites of small monolayer MoS2 and good affinity of Au toward Hg, the current method displayed high sensitivity （LOD = 190 nmol L-l） and enhanced selectivity. As control, nanostructures including Cu7S4-Au, Cu7S4@S-MoS2 and Cu7S4-Au@M-MoS2 （M： multilayer） were also investigated, but showed low re- sponse to Hg（Ⅱ）, suggesting that both Au domains and active edge sites of monolayer MoS2 have crucial synergistic effects on the high-performance for recognition of Hg（Ⅱ）. Moreover, the developed method displays satisfied performance for the detection of Hg（Ⅱ） in real samples, which indicates its potentials in practical applications.
