Improved charge carrier dynamics of WS₂ nanostructures by the way of CdS@WS₂ heterostructures for use in water splitting and water purification

Abstract

Long emission decay life time and significantly quenched fluorescence emission of tungsten disulfide (WS2)/cadmium sulfide (CdS) heterostructures aid in enhancing photoelectrochemical water splitting and water purification properties.

Moisture-Resistant and Highly Selective NH3 Sensor Based on CdS/WS2 Composite Heterojunction

“…In CdS, the typical vibrations of the Cd–S bond correspond to the three distinct absorption peaks at 1380, 1032, and 600 cm –1 . The H–O–H bending motion and O–H stretching vibrations of the adsorbed water in the CdS/WS 2 composite are reflected in peaks at 1626 and 3430 cm –1 . The peak is attributed to the symmetric and asymmetric stretching modes of the O–H bond, which can be adjusted to the asymmetric stretching modes of surface O–H bonds and defects.…”

“…The IR spectroscopic analysis showed the surface chemical information and the vibrational modes of the chemical bonds of the samples. Figure 8a 57 The peak is attributed to the symmetric and asymmetric stretching modes of the O−H bond, which can be adjusted to the asymmetric stretching modes of surface O−H bonds and defects. These hydroxyl groups are hydrophilic functional groups and have a high affinity for water molecules.…”

Hydrogen Peroxide Production with High Solar to Chemical Conversion (0.16%) and Efficient Water Purification Using Carbon Quantum Dots-Modified Indium Sulfide

“…In the photocatalytic reduction of Cr­(VI), the absorbance spectrum for dark samples has a peak at 350 nm, which corresponds to the dichromate anion. Materials exposed to light, however, show a red shift (368 nm), which is attributed to the conversion of dichromate anions to chromate anions in near-neutral (pH6) media, which is the predominant species as shown in our previous work . Chromate and dichromate anions exist in a chemical equilibrium (aqueous phase) as follows …”

An inclusive perspective on the recent development of tungsten‐based catalysts for overall water‐splitting : A review

“…This results in a greater number of charge carriers, better charge separation, and charge migration. In comparison to the pristine sulfides, the nanostructures had a severalfold boost in photocurrent density 0.15 mA cm −2 at 1.23 V vs RHE in photoelectrochemical overall water splitting 148 . Using a simple colloid synthesis technique, Liu et al produced high‐quality 1T′ phase WS 2 nanomaterials and 2H phase WS 2 nano‐structures as shown in Figure 9A.…”

“…In comparison to the pristine sulfides, the nanostructures had a severalfold boost in photocurrent density 0.15 mA cm À2 at 1.23 V vs RHE in photoelectrochemical overall water splitting. 148 Using a simple colloid synthesis technique, Liu et al produced high-quality 1T 0 phase WS 2 nanomaterials and 2H phase WS 2 nano-structures as shown in Figure 9A. After surface treatment, the strong bonding between a positive charge surfactant and WS 2 rendered 1T 0 -WS 2 highly stable, allowing it to be effectively distributed in a polar solvent.…”