2D amorphous MoS₃ nanosheets with porous network structures for scavenging toxic metal ions from synthetic acid mine drainage

Abstract

2D amorphous MoS3 nanosheets with a unique porous network structure for heavy metal adsorption.

Aqueous Adsorption of Heavy Metals on Metal Sulfide Nanomaterials: Synthesis and Application

“…For example, the active S-sites in some MS-NCs are bridging S 2 2− or apical S 2− species, having more electron binding energies than other active sulfide atoms [25]. However, these sites are active only when the S-sites consisting of unsaturated and interfacial S atoms are exposed [5,26]. This observation explains why moderate deposition of exfoliated units on active sites promotes pollutants salvaging from aqueous solutions, unlike excess loading of the units, which completely covers the reactive sites [25].…”

“…MSs in a solution can be exfoliated by mechanical approaches and ionic intercalation (chemical exfoliation) [12]. Exposure to many active sites by exfoliation in multiple layers or a single layer using ultrasonic LPE can easily be done [5]. For example, bulk MoS x obtained by thermal decomposition of (NH 4 ) 2 MoS 4 can be exfoliated in a suitable polar micromolecular solvent into monolayers or individual nanoflakes using ultrasonic radiation [6,7].…”

“…The novel synthetic MSs or their NCs, in general, are excellent adsorbents of HMs with direct surface activation. They are amenable to fine-tuning for specific properties such as controlling the interlayer spacing and layer thickness through cation exchange [4] and exfoliation/intercalation using suitable polar micromolecular solvent [5][6][7]. These processes make the MSs capable of capturing hydrated HMs with hydrated radii larger than the layer d-spacing of MSs [8].…”

Mo(VI) dithiocarbamate with no pre-existing Mo–S–Mo core as an active lubricant additive

“…Two main molybdenum contributions are found: one with a Mo3d5/2 peak around 232.1 eV (Mo3d (C), pink) corresponding to a Mo(+VI) environment related to MoO3 or FeMoO4 [7,20,21] and another one with a Mo3d5/2 peak around 229.0 eV (Mo3d (B), blue) attributed to a Mo(+IV) environment that could correspond to MoS2 [6,20] or MoS3 [22,23]. with [22], but in much lower amount compared to MoS2 regarding the at% of S2p(C) peak ( Figure 4 and Table 2).…”

The Effect of Additive Chemical Structure on the Tribofilms Derived from Varying Molybdenum-Sulfur Chemistries

“…One of the better known of these species is molybdenum trisulfide (MoS 3 ), which shares a proposed structural form with the core of the MoDTC trimer. MoS 3 is proposed to exist as chains of triangular Mo 3 S 13 units joined by bridging disulfide ligands [41,45]. The structure of which is shown in Fig.…”