Synthesis and investigation of CdS/ZSM-5 photocatalytic activity for removal of xylene vapors from air

Document Type : Original Article

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Department of Chemistry, Faculty of Science, Zanjan University, Zanjan, Iran

Abstract

In this research work, CdS and CdS/ZSM-5 were synthesized by hydrothermal method and their photocatalytic activity was investigated for removing xylene vapors from air in two states: powdered and immobilized on a glass substrate. The CdS in the immobilized state removed a higher percentage of xylene than in the powdered state. Also, by loading CdS onto ZSM-5 zeolite, the photocatalytic activity increased and the CdS/ZSM-5 photocatalyst can decompose 75% of the xylene pollutant. Analysis of X-ray diffraction, scanning electron microscopy, and UV-visible diffuse reflectance spectroscopy were used to investigate the physical and chemical properties of CdS and CdS/ZSM-5. According to the results of X-ray diffraction analysis, the structure of synthesized cadmium sulfide was hexagonal, and according to the scanning electron microscope images, cadmium sulfide was synthesized in a spherical shape. The UV-visible diffused reflectance spectroscopy also showed that band gap of CdS and CdS/ZSM-5 is 1.85 and 2.24 ev, respectively.

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