XPS and Raman study of the active-sites on molybdenum disulfide nanopetals for photocatalytic removal of rhodamine B and doxycycline hydrochlride

Abstract

Molybdenum disulfide (MoS2) nanopetals were successfully synthesized by hydrothermal method (sample without sintering) and then sintered at different temperature (sintered samples).

Enhancing Nitrogen Reduction Reaction through Formation of 2D/2D Hybrid Heterostructures of MoS2@rGO

“…The high-resolution Mo 3d spectrum (Figure a) consists of component peaks located at 228.6, 230.1, 231.8, 233.2, and 235.3 eV. The two main peaks at 228.6 and 231.8 eV are assigned to Mo 4+ d 5/2 and Mo 4+ d 3/2 of the 2H phase, while the component peak at a lower binding energy (225.8 eV) is attributed to S 2s. , The presence of the 1T phase on the pristine MoS 2 sample was shown by additional component peaks at 228.2 and 231.2 eV (Figure S7b), corresponding to the Mo 4+ d 5/2 and Mo 4+ d 3/2 oxidation states of the 1T phase. , The binding energies at 229.1 and 232.3 eV corresponded to Mo 5+ d 5/2 and Mo 5+ d 3/2 regions. , Compared to the pristine MoS 2 sample (Figure S7), the binding energies of Mo 4+ in the MoS 2 @rGO are slightly negatively shifted. The negative shift of the Mo 4+ species can be ascribed to the interaction of the Mo atoms with the graphene lattice.…”

“…The negative shift of the Mo 4+ species can be ascribed to the interaction of the Mo atoms with the graphene lattice. The existence of the fifth XPS peak at 235.7 eV can be indexed to Mo 6+ 3d 5/2 , indicating regions of surface oxidation of MoS 2 . , …”

“…The existence of the fifth XPS peak at 235.7 eV can be indexed to Mo 6+ 3d 5/2 , indicating regions of surface oxidation of MoS 2 . 50,52 Last but not least, the core-level spectrum of the S 2p peak (Figure 3b) was resolved into a doublet corresponding to S 2p 3/2 (∼161.4 eV) and S 2p 1/2 (∼163.9 eV), respectively. This represents the presence of bridging S 2 2− -type species bonded to Mo 4+ oxidation states.…”

A green electrolysis of silver-decorated MoS2 nanocomposite with an enhanced antibacterial effect and low cytotoxicity

“…The diffraction peaks at 14.5, 33.0, 39.8, 49.8, 58.4 and 60.4 were attributed to the (002), (101), (103), (105), (110) and (108) crystalline planes of MoS 2 , respectively, according to the MoS 2 standard card (JCPDS no: 37-1492). 29,30 No additional peaks were observed in the XRD diagram, indicating a good formation of the Ag nanoparticles-doped MoS 2 nanosheets with high purity.…”

Study of Sorption Kinetics of Doxycycline on pH Sensitive Hydrogel-based Graft Copolymers of Chitosan/Arabinogalactan/ Gummiarabic with Vinyl Monomers

“…Separation of Dox from polluting water to prevent such adverse effects is an actual topic. Research on its adsorption of Dox on organic, inorganic and hybrid polymeric materials can be found in the literature [15][16][17][18][19][20] .…”