Premium
Photocatalytic Degradation of Glyphosate in Water by N‐Doped SnO 2 /TiO 2 Thin‐Film‐Coated Glass Fibers
Author(s) -
Kongsong Peerawas,
Sikong Lek,
Niyomwas Sutham,
Rachpech Vishnu
Publication year - 2014
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/php.12338
Subject(s) - photocatalysis , materials science , doping , band gap , crystallite , degradation (telecommunications) , thin film , absorption (acoustics) , nitrogen , sol gel , visible spectrum , grain size , chemical engineering , analytical chemistry (journal) , composite material , nanotechnology , chemistry , optoelectronics , catalysis , environmental chemistry , organic chemistry , computer science , telecommunications , engineering , metallurgy
Photocatalytic degradation of glyphosate contaminated in water was investigated. The N‐doped SnO 2 /TiO 2 films were prepared via sol–gel method, and coated on glass fibers by dipping method. The effects of nitrogen doping on coating morphology, physical properties and glyphosate degradation rates were experimentally determined. Main variable was the concentration of nitrogen doping in range 0–40 mol%. Nitrogen doping results in shifting the absorption wavelengths and narrowing the band gap energy those lead to enhancement of photocatalytic performance. The near optimal 20N/SnO 2 /TiO 2 composite thin film exhibited about two‐ and four‐folds of glyphosate degradation rates compared to the undoped SnO 2 /TiO 2 and TiO 2 films when photocatalytic treatment were performed under UV and solar irradiations, respectively, due to its narrowest band gap energy (optical absorption wavelength shifting to visible light region) and smallest crystallite size influenced by N‐doping.