祝贺尹文艳老师和董兴华同学的研究工作被ACS Appl. Mater. Interface接收

Title：MoS₂ nanosheets-assisted coordination of metal ions with porphyrin for rapid detection and removal of cadmium ions in aqueous media

Abstract：

Molybdenum disulfide (MoS₂) is a two-dimensional (2D) graphene-like material that is gaining great attention due to its potential application in various fields. Here, we reported a self-assembled nanocomposite consisted of MoS₂ nanosheets and 5,10,15,20-Tetrakis(1-methyl-4-pyridinio) porphyrintetra(p-toluenesulfonate) (TMPyP), named as MoS₂@TMPyP. This nanocomposite can be used as a sensing probe for low cost, rapid, selective detection of cadmium (Cd²⁺) ions. It is found that a new Soret band at 442 nm in UV-vis absorption spectra represented the coordination of Cd²⁺ ions into TMPyP of the MoS₂@TMPyP. The coordination rates between TMPyP and Cd²⁺ ions is greatly accelerated from 72 h to 20 min with the assistance of MoS₂, which is 200 times faster than in the absence of MoS₂. The limit of detection (LOD) of the Cd²⁺ is as low as 7.2 × 10-8 mol/L. The binding behavior between the cationic TMPyP and MoS₂ nanosheets was corroborated by molecular dynamics simulation and various control experiments. The results demonstrated that electrostatic interaction was the main force for driving TMPyP enriching around the excess MoS₂ surface, resulting in an accelerated complexation of Cd²⁺ and TMPyP. Moreover, MoS₂@TMPyP nanocomposite can also be used for removing of Cd²⁺ in water. The removal efficiency (RF) of the MoS₂@TMPyP can reach to 91% for high concentrations of Cd²⁺. This work provides a new insight into detection and removal of Cd²⁺ ions in water.

Citation：

YinWenyan^#*, Dong Xinghua^#, Yu Jie, Pan Jun, Yao Zhiyi^*,Gu Zhanjun^*, Zhao Yuliang^*. MoS₂ nanosheets-assisted coordination of metal ions with porphyrin for rapid detection and removal of cadmium ions in aqueous media. ACS Applied Materials & Interfaces.2017.DOI: 10.1021/acsami.7b04185

Acknowledgments：

       This work was supported by the National Basic Research Programs of China (2016YFA0201603, 2015CB932104, 2014CB931900), the Beijing Natural Science Foundation (2162046), the National Natural Science Foundation of China (11621505, 31571015, 21320102003), and Innovation Program of the Chinese Academy of Sciences (QYZDJ-SSW-SLH022). We also thank Dr. Peng Xu in National Center for Nanoscience and Technology of China for her assistance during the XPS measurement.