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Abstract
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secondary hard template, as a photocatalyst support for ZnO photocatalyst has been investigated. The ZnO/ SAPO-34 (AC-U)-U photocatalyst was applied for photodegradation of dye molecules under simulated-solar- light irradiation. X-ray diffraction (XRD), eld-emission scanning-electron-microscope (FESEM), Bar- rett–Joyner–Halenda (BET-BJH), Differential re ectance spectroscopy (DRS), Temperature-programmed reduc- tion of hydrogen (H2-TPR) and Photoluminescence spectroscopy (PL) analyses have been applied to investigate the physiochemical properties of the catalysts. The BET-BJH results indicated that applying hard-template (active carbon) coupled with sonication leads to a raise in mean pore diameter of sample from 0.5 to 16.6 nm (about 32 folds higher). H2-TPR analysis con rms that the ZnO is dispersed uniformly by utilizing sonication. Furthermore, morphological analyses showed that the sonicated sample have more channel-like defect on the surface. PL analysis demonstrates the lower recombination rate of electrons-holes for the composite structure. The hierar- chical architecture compared to the conventional pore structure has signi cantly increased adsorption capacity of dye from 10.8% to 50.3% by modifying the texture and pore structure. Sonicated photocatalyst showed the highest methylene blue degradation ef ciency (95.7%). Hence, the ZnO/SAPO-34 (AC-U)-U nanocomposite photocatalyst depicts as a promising reusable photocatalyst for the photodegradation of dye-polluted water.
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