3 years ago

Fabrication and photocatalytic properties of Multi–Morphological CdS NSs prepared by the thermolysis of heterocyclic dithiocarbamate Cadmium(II) complexes as precursors

Narayanaswamy Srinivasan

Publication date: March 2019

Source: Dyes and Pigments, Volume 162

Author(s): Narayanaswamy Srinivasan

Abstract

These novel cadmium(II) complexes are used as a single source precursor for the preparation of CdS nanostructures (NS) using different amine solvents. The (102) plane is weaker in all the powder X–ray diffraction patterns of as–obtained CdS NSs and it confirmed that the synthesized CdS NSs are wurtzite phase. In this report, the amine solvents are used as a thermolysis solvent and these are highly effective and shape directing agent due to their chelating properties. The electron microscopy studies indicate that CdS NSs are in nanosize and most of the CdS NSs are in nanorods, nanowires and few of them in heteroarchitecture (bipods, tripods). These results show that all the synthesized CdS NSs are hexagonal phase and high crystalline materials. The structure and property of the solvents can strongly affect the shape and size of as–synthesized CdS NSs. IR spectra are recorded to examine the purity of as–synthesized CdS NSs. Finally, the effect of amine solvent and Cd(II) precursors are able to control the size and shape of the achieved CdS NSs by using precursor solvothermal decomposition method. The obtained CdS semiconductor photocatalyst shows enhanced photocatalytic activity.

Graphical abstract

The novel heterocyclic dithiocarbamate cadmium(II) complex and its nitrogen donor adducts are used as a single source material for the preparation of CdS NSs using different solvents such as ethylenediamine, 1,3–propanediamine, 1,4–butanediamine, and diethylenetriamine in thermolysis process. By degradation of RO 4 dye, it was found that the nanorods prepared with [Cd(3–mpipdtc)2(py)] and [Cd(3–mpipdtc)2(2,2’–bipy)] showed relatively high photocatalytic activity.

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