A Heterolayered Nanocomposite Compound of Molybdenum Disulfide with Cobalt Hydroxide: Structure and Photothermal Activity in the Near IR Range
摘要
The structure of the nanocomposite compound containing alternating monolayers of molybdenum disulfide and defective cobalt hydroxide is discussed based on the data of powder X-ray diffraction, X-ray photoelectron and UV-Vis-NIR spectroscopy, and quantum chemical DFT computations. Model structures are considered with different variants of filling the MoS2 interlayer space with neutral and cationic cobalt hydroxo compounds. The model with negatively charged MoS2 layers and layers of cationic Co-containing clusters forming hydrogen-bonded 2D networks involving water molecules is found to be most energetically favorable. The nanocomposite obtained is highly efficient in the photoconversion of NIR into heat, which is explained by that its sulfide layers have the structure of the MoS2 1T-polymorph.