Study of nano-CdS prepared in methanolic solution and polymer electrolyte matrix

Abstract

This present paper reports the study of cadmium sulphide (CdS) nanoparticles prepared under controlled condition in methanolic solution and also in polyethylene oxide polymer electrolyte matrix. The sulphurations of the cadmium salts were done in situ by a sodium sulphide solution. The concentration of the precursors has been controlled as detailed in the paper. All the preparation and characterization were carried out at room temperature. The nanoparticles were characterized by UV/Vis spectra in the range of 600 to 250 nm. The absence of bulk/micron size particles was noted in either of the system. The absorption edge near 510 nm indicates the presence of bulk CdS, whereas the presence of nanometer-sized particles is also reflected in low wavelength region. The sizes of the particles as well as particle distribution have been estimated using X-ray diffraction and scanning electron microscopy, respectively. A comparison in the spectra has been done for the sample prepared in either of the matrices. The particle size distribution in the polymeric matrix has been found to be more in comparison to that in the methanolic suspension. The polymer is reported to work as a binder, but not as a capping agent.

Electrostatic model of semiconductor nanoparticles trapped in polymer electrolytes

“…In all polymeric matrices, the term is negative, indicating a strong solvation of the nanoparticle by the medium. In all the experimental results of nanocrystal growth in polymer matrix similar inference has been drawn (Kumar et al 2011). Good solvation of the semiconductors by the polymers have been reported to result in the formation of nanocrystallites.…”

Biomedical Waste Management by Using Nanophotocatalysts: The Need for New Options

“…Moreover, changing the size of the nanocatalyst makes it possible to adjust the absorbance wavelength. Additionally, the optical and electronic characteristics of the nanocatalyst can be modified by tuning their sizes [38]. Due to all these favorable properties, nanophotocatalysts have been employed in a wide range of reactions, for instance, in organic synthesis, splitting water to hydrogen fuel generation, inactivation of cancer cells, and dye degradation [39,40].…”

The fabrication of CdS/CoFe2O4/rGO photocatalysts to improve the photocatalytic degradation performance under visible light

“…Therefore, CdS is an attractive candidate as a photocatalyst, which can efficiently absorb visible light. [1][2][3][4] However, its activity and stability far from satisfying the demand of researchers because of rapid charge recombination and photo-corrosion, which limit its large scale applications. 5,6 Also, it is desirable that the photocatalyst material should be easily separable from the reaction system aer the degradation of the target pollutant.…”