Enhancement of photocatalytic degradation of 4-nitrophenol by integrating Ag nanoparticles with ZnO/HZSM-5 nanocomposite

Document Type: Articles

Authors

1 Dental and Periodental Research Center, Tabriz University of Medical Sciences, Tabriz. Iran.

2 Inorganic Chemistry Department, Faculty of Chemistry, University of Tabriz, Iran.

3 Applied Chemistry, Islamic Azad University, Sofian Branch, Sofian, Iran.

4 Industrial Nanotechnology research center, Islamic Azad University, Tabriz Branch, Tabriz, Iran.

Abstract

In this paper, Ag/ZnO/HZSM-5ternary nanocomposites with different Ag loadings were prepared by the photo precipitation method. The prepared photocatalysts were characterized by XRD, BET, SEM and TEM. The photocatalytic activity of ZnO/HZSM-5 for 4-nitrophenol (4-NP) degradation was increased by silver doping. Effects of various parameters such as the initial concentration of 4-NP, pH and Ag loading on 4-NP degradation were studied. The best activities were obtained for the 3% Ag-10% ZnO/HZSM-5 nanocatalysts at pH 7.9, 1 g L−1 of the catalyst and 5 ppm of 4-NP. Langmuir–Hinshelwood (L–H) model was proposed for the rate equation of the 4-NP degradation.

Keywords


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