Synthesis of nanocomposite based on Semnan natural zeolite for photocatalytic degradation of tetracycline under visible light

Saadati, Farzaneh; Keramati, Narjes; Mehdipour Ghazi, Mohsen

doi:10.22104/aet.2016.399

Synthesis of nanocomposite based on Semnan natural zeolite for photocatalytic degradation of tetracycline under visible light

Document Type : Research Paper

Authors

¹ Faculty of Nanotechnology, Semnan University, Semnan, 35131-19111, Iran

² Faculty of nanotechnology, Semnan University, Semnan, 35131-19111, Iran

³ Faculty of Chemical, Petroleum and Gas Engineering, Semnan University, Semnan, 35131-19111, Iran

10.22104/aet.2016.399

Abstract

This study investigated the photocatalytic behaviors for the nanocomposite of TiO₂ P25 and Semnan natural zeolite in the decomposition of tetracycline under visible light in an aqueous solution. The structural features of the composite were investigated by a series of complementary techniques that included X-ray diffractometer (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), surface area (BET) measurement, and ultraviolet-visible diffuse reflectance spectroscopy (DRS). The surface area measurement disclosed an enhancement of surface area by ~2 times for the synthesized TiO₂/Semnan natural zeolite than that of commercial TiO₂ P25. The as-prepared photocatalyst (TiO₂/Semnan natural zeolite) showed pH dependence and more than 87% of the tetracycline could be degraded from the solution under visible irradiation within 90 min at a pH of 6. This excellent catalytic ability was mainly attributed to the hybrid effect of the photocatalyst and adsorbent. The results provided new insight into the performance of active photocatalysts on the treatment of pharmaceutical wastewater. In addition, the immobilization of TiO₂ onto Semnan natural zeolite permitted easier separation of the adsorbent from the treated water.

Keywords

Main Subjects

Advanced oxidation processes

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