Combined Adsorption/Photocatalytic dye removal by copper-titania-fly ash composite

Andrea Pace, Devagi Kanakaraju, Ying-Chin Lim, Ying-Chin Lim, Muhamad Hazim Bin Ya

Research output: Contribution to journalArticle


Achieving both photocatalytic efficiency and adsorption capacity is essential to produce a highly efficient photocatalyst. This study fabricated a new photocatalyst by combining copper (Cu) doped titanium dioxide (TiO2) with fly ash (FA). The photocatalysts were synthesized using mild acid (acid-FA/Cu/TiO2), base (base-FA/Cu/TiO2), and deionized water (rFA/Cu/TiO2) activated FA. EDX confirmed the inclusion of Cu in both Cu/TiO2 and FA/Cu/TiO2 composites. XRD analysis indicated the presence of the anatase form of TiO2 after Cu doping and incorporation into modified FA. All three FA/Cu/TiO2 composites demonstrated high absorption (UV and visible region) compared to their TiO2 and Cu/TiO2 counterparts based on the diffuse reflectance UV-Vis spectra. Complete removal of methyl orange under UV and 99.1% removal under visible light irradiation were attained using 1.5 g/L base-FA/Cu/TiO2. Both dark and irradiation phases demonstrated the synergistic role of adsorption and photocatalysis by the FA/Cu/TiO2 composites to ensure the removal of dye in water.
Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalSurfaces and Interfaces
Publication statusPublished - 2020

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

Cite this

Pace, A., Kanakaraju, D., Lim, Y-C., Lim, Y-C., & Bin Ya, M. H. (2020). Combined Adsorption/Photocatalytic dye removal by copper-titania-fly ash composite. Surfaces and Interfaces, 19, 1-8.