Photocatalytic Activity of CdS Nanosheets Prepared by Chemical Bath Deposition Method

Abstract

Abstract CdS nanosheets are synthesized via the chemical bath deposition method (CBD) using three different Cd/S molar ratios for the photocatalytic degradation of methylene blue (MB), as an example of an organic pollutant. The resulting nanosheets were characterized by XRD, FESEM, and UV-VIS spectroscopy. The XRD data analysis for prepared powder resulted in mixed phases of zinc-blende and wurtzite in all different Cd/S molar ratios with average crystalline size increased from (50.9 nm to 59.7 nm). The as-prepared CdS shows an absorbance edge increased from (340 nm, to 490). The value of the bandgap decreased from (2.6 eV to 2.3 eV) with an increasing molar ratio. Increasing molar ratio also leads to high and stable photocatalytic with high degradation efficiency (92.7-98.4) % after 150 min of sunlight irradiation. Graphical Abstract