Flower-Like Molybdenum Disulfide for Polarity-Triggered Accumulation/Release of Small Molecules

Abstract

Flower-like molybdenum disulfide (MoS) with rich edge sites has been prepared by the hydrothermal method. The edge sites possess polarity due to the noncentrosymmetric Mo-S on exposed (100) facets and thus show a strong electrostatic attraction toward polar species. The flower-like MoS can be used as small-molecule carriers for the model drug, Rhodamine B (RhB). The results prove that flower-like MoS have fast adsorption kinetics and perform a switchable accumulation/release with response to the solvent polarity. An outstanding reusability can be found in flower-like MoS due to little cargo retention, and the recycle of adsorption can be repeated 100 times with above 88.5% of the adsorption capacity retained. The flower-like MoS with solvent polarity-triggered loading/release can be extended to controlled release and color switch of display.

Biochar Derived from Sawdust Embedded with Molybdenum Disulfide for Highly Selective Removal of Pb2+

“…TEM revealed more structure information on the MoS 2 @biochar (Figure G). The interplanar distance of high-resolution transmission electron microscopy (HRTEM) image was measured to be 0.26 nm corresponding to the (100) plane of MoS 2 (Figure H) . The images of the energy-dispersive X-ray spectroscopy (EDS) mapping showed the elemental distribution of C Ka 1, O Ka 1, S Ka 1, and Mo Ka 1 (Figure I–L), which all were similar to the profile of Figure G.…”

“…The interplanar distance of highresolution transmission electron microscopy (HRTEM) image was measured to be 0.26 nm corresponding to the (100) plane of MoS 2 (Figure 1H). 27 The images of the energy-dispersive Xray spectroscopy (EDS) mapping showed the elemental distribution of C Ka 1, O Ka 1, S Ka 1, and Mo Ka 1 (Figure 1I−L), which all were similar to the profile of Figure 1G. Furthermore, the outline of S Ka 1 matched with the Mo Ka 1, implying the MoS 2 was deposited onto biochar successfully.…”

Partial Oxidation Strategy to Synthesize WS2/WO3 Heterostructure with Enhanced Adsorption Performance for Organic Dyes: Synthesis, Modelling, and Mechanism

“…They have already shown unique chemical and physical advantages compared with the bulk counterparts since the layered structures possess open channels to provide more active sites for adsorbates. Among these materials, the transition metal dichalcogenides (TMDs) are attractive due to their sandwich structures where covalently bound (X-M-X) trilayers are held together by van der Waals forces, which are conducive to forming a layered structure [22,23]. More importantly, strong polar X-S covalent bonds located at lamellar layers' edges could attract polar species like organic dyes [22,24].…”

Edge Engineering in 2D Molybdenum Disulfide: Simultaneous Regulation of Lithium and Polysulfides for Stable Lithium–Sulfur Batteries

“…Edge sites in 2D transition metal dichalcogenides (TMDs) can alter their intrinsic physicochemical properties and have been reported to be able to enormously improve their performance as adsorbents [ 43 ] and catalysts. [ 44 ] Herein, utilizing MoS 2 as a model material, we first study theoretically the adsorption affinity of edge sites for polysulfides and Li + .…”