Photocatalytic degradation of the acetaminophen by nanocrystal-engineered TiO2 thin film in batch and continuous system

Un-biodegradable pharmaceuticals are one of the major growing threats in the wastewaters. In the current study, TiO 2 thin film photocatalysts were designed by nanocrystal engineering and fabricated for degradation of the acetaminophen (ACE) in a photocatalytic reaction under UV light irradiation in...

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Bibliographic Details
Published in:Frontiers of environmental science & engineering 2021-04, Vol.15 (2), p.27, Article 27
Main Authors: Katal, Reza, Tanhaei, Mohammad, Hu, Jiangyong
Format: Article
Language:English
Subjects:
Acetaminophen
Analgesics
Annealing
Biodegradation
Catalytic activity
Earth and Environmental Science
Environment
Flat plates
Flow rates
Flow velocity
Grain size
Heat treatment
High temperature
Holes (electron deficiencies)
Irradiation
Light irradiation
Nanocrystals
Photocatalysis
Photocatalysts
Photodegradation
Reactors
Short Communication
Surface roughness
Thin films
Titanium dioxide
Ultraviolet radiation
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Summary:Un-biodegradable pharmaceuticals are one of the major growing threats in the wastewaters. In the current study, TiO 2 thin film photocatalysts were designed by nanocrystal engineering and fabricated for degradation of the acetaminophen (ACE) in a photocatalytic reaction under UV light irradiation in batch and continuous systems. The photocatalyst was prepared by sputtering and then engineered by thermal treatment (annealing at 300°C (T300) and 650°C (T650)). The annealing effects on the crystallinity and photocatalytic activity of the TiO 2 film were completely studied; it was found that annealing at higher temperatures increases the surface roughness and grain size which are favorable for photocatalytic activity due to the reduction in the recombination rate of photo-generated electron-hole pairs. For the continuous system, a flat plate reactor (FPR) was designed and manufactured. The photocatalytic performance was decreased with the increase of flow rate because the higher flow rate caused to form the thicker film of the liquid in the reactor and reduced the UV light received by photocatalyst. The reusability and durability of the samples after 6 h of photocatalytic reaction showed promising performance for the T650 sample (annealed samples in higher temperatures).
ISSN:2095-2201
2095-221X
DOI:10.1007/s11783-020-1319-9