Superior photocatalytic activity of tungsten disulfide nanostructures: role of morphology and defects

BiOCl/WS2 hybrid nanosheet (2D/2D) heterojunctions for visible-light-driven photocatalytic degradation of organic/inorganic water pollutants

“…The solid content thus recovered was washed with DI water and ethanol. Then the content was dried at a temperature of 30 C inside the furnace for 4 h. 51 The chemical reactions involved in the synthesis of WS 2 nanosheets are as follows:…”

Paper-Based Electrodes Conjugated with Tungsten Disulfide Nanostructure and Aptamer for Impedimetric Detection of Listeria monocytogenes

“…The E 2g 1 mode arises from in-phase vibrations of W atoms in the opposite direction with respect to S atoms, while the A 1g mode is assigned to the S atoms which are moving in-phase and in out-of-plane directions. We observed the E 2g 1 mode at 351 cm −1 and the A 1g mode at 420 cm −1 ; the difference between these two modes, i.e., Δω was 69 cm −1 , which confirmed the formation of WS 2 [ 13 ].…”

“…The diffraction peaks of WS 2 with their respective (hkl) planes were obtained at 15.09° (002), 23.4° (112), 28.2° (004), 29.2° (100), 30.5° (101), 35.3° (102), 38.64° (103), 46.4° (006), 50.82° (105), 53.22° (106), 59.55° (110), 65.51° (114), and 71.22° (203), which confirmed the formation of WS 2 with hexagonal structure (JCPDS No.84-1398, 08-0237) ( Figure 1 c). A sharp peak (002) indicated the highly crystalline nature of synthesized WS 2 [ 13 , 15 ], while the small one at 23.41° was due to the organic moiety of polyethylene glycol (PEG), which was used as a surfactant.…”

“…The electrochemical paper-based micro-analytical device (ePAD)was fabricated via screen printing technology using carbon conductive ink, as reported in the literature [ 13 , 14 ]. After drying the ink for 20 min, a wax coating was applied around the electrodes to create a hydrophobic barrier and to define the working area over the ePAD.…”

Inorganic–organic nanohybrid of MoS2-PANI for advanced photocatalytic application

“…Additionally, the theoretical and experimental values of (2) Fig. 4 a, Q e were not found to be in good match which implied that adsorption kinetics cannot be well explained by pseudo second order adsorption model [32]. Pseudo second order model presents the chemisorption process which involves the formation of relatively strong bonds with the surfaces [33].…”