Surfactant free synthesis of CdS nanospheres, microstructural analysis, chemical bonding, optical properties and photocatalytic activities

A Z‐Scheme Strategy that Utilizes ZnIn2S4 and Hierarchical VS2 Microflowers with Improved Charge‐Carrier Dynamics for Superior Photoelectrochemical Water Oxidation

“…[30] The peaks within the range 400-700 cm À1 were assigned to metalÀsulfur bonds, [31] whilst the peaks at about 2921 and 2852 cm À1 were assigned to CÀHs tretching modes. [32,33] In the FTIR spectrum of VS 2 ,a part from the peaks mentioned above, ap eak was observed at 984 cm À1 , which was assigned to the n(V=S) terminal Sstretches, which confirmed the presence of the V 4+ + oxidation state in VS 2 . [34] AV =S peak was also observed in the spectrum of ZnIn 2 S 4 -VS 2 ,a lbeit slightly shifted towards higher energy compared to that in the VS 2 spectrum, which could be indicative of interactions between ZnIn 2 S 4 and the terminal Sa toms of VS 2 .T his observation was further investigated by using XPS analysis (see below).…”

“…The band at about 1620 cm −1 corresponded to O−H bending vibrations of adsorbed water molecules, whilst the band at about 1390 cm −1 was attributed to surface‐adsorbed hydroxy groups . The peaks within the range 400–700 cm −1 were assigned to metal−sulfur bonds, whilst the peaks at about 2921 and 2852 cm −1 were assigned to C−H stretching modes . In the FTIR spectrum of VS 2 , apart from the peaks mentioned above, a peak was observed at 984 cm −1 , which was assigned to the ν (V=S) terminal S stretches, which confirmed the presence of the V 4+ oxidation state in VS 2 .…”

Development of oxygen vacancies and surface defects in Mn-doped ZnO nanoflowers for enhancing visible light photocatalytic activity

“…9a, b. It is noted that the photodegradation of methylene blue follows pseudo-first-order kinetics, which is given below [12], (6) log…”

“…In today's research on photocatalytic activity, these nanostructures are most significant nanomaterials due to their high surface to volume ratio and smaller band gap [1][2][3]. To enhance the photocatalytic activities, the following parameters affect photocatalytic efficiencies such as a surface area to volume ratio, porosity, oxygen vacancy, surface defects, conductivity, thermal stability, chemical stability, high mobility and low band gap [4][5][6]. Recently ZnO is strong semiconducting nanomaterial for degradation of methylene blue, methyl orange, rhodamine-B, and congo red, etc.…”

Degradation of Methylene Blue Using Cadmium Sulfide Photoanode in Photofuel Cell System with Variation of Electrolytes

“…Raman spectroscopy can be used to characterize the crystalline behavior of the material quality, including the surface condition and homogeneity with fast and nondestructive work, with a sharp peak for the crystalline sample and very broad peaks for amorphous or polycrystalline ones [36]. Hence, Raman spectroscopy was used for the structural characterization of CdS thin film.…”