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

Iranian Journal of Catalysis

مقاله 7، دوره 9، شماره 1، خرداد 2019، صفحه 63-70   

نوع مقاله: Articles

نویسندگان

Baharak Divband^{1، 2}؛ Azadeh Jodaei^{* 3، 4}؛ Masumeh Khatamian²

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

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

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

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

چکیده

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.

کلیدواژه‌ها

Photo precipitation method؛ Ag/ZnO/HZSM-5؛ Ternary nanocomposites؛ Photocatalytic oxidation

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