Environmental Science and Pollution Research

, Volume 25, Issue 20, pp 20125–20140 | Cite as

Nanocomposite Au NP/TiO2 thin film in the efficient remediation of aqueous solutions contaminated with emerging micro-pollutants

  • Lalliansanga Nil
  • Alka Tiwari
  • Alok Shukla
  • Diwakar Tiwari
  • Seung Mok Lee
Research Article


The present communication specifically aims to synthesize novel nanocomposite material Au NPs/TiO2 in a simple template process using the polyethylene glycol as filler media. The thin film of the nanocomposite material was characterized by the advanced analytical tools. The surface morphology was obtained by the scanning electron microscopic (SEM) and transmission electron microscopic (TEM) images of solids. Similarly, the surface topography and roughness of solid were obtained by the atomic force microscopic (AFM) image of thin film. X-ray diffraction (XRD) data enabled to confirm that the TiO2 was predominantly present with its anatase phase. The specific surface area and pore size of the solid were obtained using the N2 adsorption/desorption data. Nanocomposite Au NP/TiO2 thin film was employed in the photocatalytic removal of sulfamethoxazole and triclosan from aqueous solutions using less harmful UV-A light (λmax = 330 nm). Various physicochemical parametric studies enabled to deduce the mechanism involved in the degradation process. The degradation kinetics as a function of pH (pH 4.0–10.0) and micro-pollutant concentrations (0.5–15.0 mg/L) was extensively studied. The mineralization of these pollutants was obtained using the non-purgeable organic carbon (NPOC) data. The stability of thin film was assessed by the repeated operations, and presence of several co-existing ions simulates the studies to real matrix treatment. Further, the presence of scavengers enabled to pin point the radical-induced degradation of sulfamethoxazole and triclosan from aqueous solutions.


Emerging water pollutants Nanocomposite Au NPs/TiO2 Degradation kinetics Mineralization Stability of catalysts 


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Lalliansanga Nil
    • 1
  • Alka Tiwari
    • 2
  • Alok Shukla
    • 2
  • Diwakar Tiwari
    • 1
  • Seung Mok Lee
    • 3
  1. 1.Department of Chemistry, School of Physical SciencesMizoram UniversityAizawlIndia
  2. 2.Department of PhysicsNational Institute of TechnologyAizawlIndia
  3. 3.Department of Health and EnvironmentCatholic Kwandong UniversityGangneungSouth Korea

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