CdS-sensitized TiO2 in phenazopyridine photo-degradation: Catalyst efficiency, stability and feasibility assessment

Synthesis, characterization and visible-light driven photocatalysis by differently structured CdS/ZnS sandwich and core–shell nanocomposites

“…(12)) [20]. As, the photo-generated holes in CdS nanocrystals cannot participate in the oxidation of hydroxyl groups due to its valence band potential, it results in the photo-corrosion of CdS, forming cadmium ions [55,56]. The reactions followed can be expressed as follows: In case of ZnS/CdS, the core material (ZnS) has a larger band gap and both energy levels are displaced symmetrically about the gap center of the shell material (CdS).…”

Phase evolution and PEC performance of ZnxCd(1−x)S nanocrystalline thin films deposited by CBD

“…It also acts as window layer in CdTe [4] and copper indium (di) selenide [5] as well as copper indium gallium (di) selenide [6] based solar cells. But the disadvantage of CdS is that it degrades into soluble cadmium cations under PEC conditions which are hazardous [7]. This would limit the use of CdS as a photoelectrode material for PEC cell unless its characteristics are modified.…”

Anthocyanin-Sensitized TiO2 Nanoparticles for Phenazopyridine Photodegradation under Solar Simulated Light

“…Another way is to sensitize the wide gap semiconductors to visible light. Narrow band gap semiconductors like CdS have been described as sensitizers and as photocatalysts in water purification [21][22][23]. CdS dye absorbs in the visible region and enhances TiO 2 photocatalyst efficiency, but unfortunately yields the hazardous Cd 2+ ions in solution upon dissolution [21].…”