• Elshypany, Rania
• Shawky, Amira M.
• Sharkawy, Heba M. El

Abstract

<jats:title>Abstract</jats:title><jats:p>Investigate the use of visible light to improve photocatalytic degradation of organic pollutants in wastewater. Nitrogen-doped titania and molybdenum sulfide nanocomposites (NTM NCs) with different weight ratios of MoS<jats:sub>2</jats:sub> (1, 2, and 3 wt.%) synthesized by a solid state method applied to the photodegradation of methylene blue(MB) under visible light irradiation. The synthesized NTM composites were characterized by SEM, TEM, XRD, FT-IR, UV–Vis, DRS and PL spectroscopy. The results showed enhanced activity of NTM hybrid nanocrystals in oxidizing MB in water under visible light irradiation compared to pure TiO<jats:sub>2</jats:sub>. The photocatalytic performance of NTM samples increased with MoS<jats:sub>2</jats:sub> content. The results show that the photodegradation efficiency of the TiO<jats:sub>2</jats:sub> compound improved from 13 to 82% in the presence of N-TiO<jats:sub>2</jats:sub> and to 99% in the presence of MoS<jats:sub>2</jats:sub> containing N-TiO<jats:sub>2</jats:sub>, which is 7.61 times higher than that of TiO<jats:sub>2</jats:sub>. Optical characterization results show enhanced nanocomposite absorption in the visible region with long lifetimes between e/h+ at optimal N-TiO<jats:sub>2</jats:sub>/MoS<jats:sub>2</jats:sub> (NTM<jats:sub>2</jats:sub>) ratio. Reusable experiments indicated that the prepared NTM NCs photocatalysts were stable during MB photodegradation and had practical applications for environmental remediation.</jats:p>

Topics

• nanoparticle
• nanocomposite
• impedance spectroscopy
• compound
• molybdenum
• scanning electron microscopy
• x-ray diffraction
• experiment
• Nitrogen
• transmission electron microscopy