We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Fabrication and characterization of Ag-doped titania: impact of dye-sensitization, phenol decomposition kinetics and biodegradability index.
- Authors
Behera, Amit Kumar; Rao, Ch Venkatanarasimha; Das, Raj Kumar; Giri, Ardhendu Sekhar; Golder, Animes Kumar
- Abstract
Heterogeneous photocatalytic wastewater treatment using TiO2is a well-accepted technique under UV light illumination. Different strategies are employed to modify TiO2for shifting its photo-response to the visible light. In this work, Ag-doped TiO2nano-composites were synthesized by UV photo-reduction method to narrow down the band gap energy. Further, dye sensitization was performed using Eosin Yellowish to find out its influence on phenol decomposition. Synthesized catalysts were characterized using diffuse UV–vis spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy (TEM), Brunner Emmer Teller (BET) area and zeta-potential measurements. Nanowire like structure was observed with 30–70 nm in diameter from TEM images. BET surface area was decreased considerably with Ag-doping (maximum 31.6%) and dye sensitization (40.6%). Ag concentration and solution pH showed dramatic impact on phenol decomposition with maximum 87% at pH 7, Ag-loading 1% (w/w) and catalyst dose 0.5 g L−1. Practically no positive synergy was noted with dye sensitization even though the photo-responses were moved intensely to the visible region. The pseudo-first order kinetic exhibited sound agreement to the experimental results with correlation coefficient ≥0.98. Moreover, the enhancement of biodegradability is investigated in terms of biochemical to chemical oxygen demand.
- Subjects
COLOR removal (Sewage purification); PHOTOCATALYSTS; SPECTRUM analysis; BIODEGRADATION of phenol; CHEMICAL oxygen demand
- Publication
Desalination & Water Treatment, 2016, Vol 57, Issue 20, p9488
- ISSN
1944-3994
- Publication type
Article
- DOI
10.1080/19443994.2015.1028457