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Kinetics, Thermodynamics, and Modeling of Amido Black Dye Photodegradation in Water Using Co/TiO 2 Nanoparticles
Author(s) -
Ali Imran,
Alharbi Omar M. L.,
Alothman Zeid A.,
Badjah Ahmad Yacine
Publication year - 2018
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.12937
Subject(s) - photodegradation , titanium oxide , chemistry , catalysis , photochemistry , kinetics , photocatalysis , titanium , oxide , inorganic chemistry , nuclear chemistry , organic chemistry , physics , quantum mechanics
Titanium oxide nanoparticles were doped with copper and characterized by XRD , FT ‐ IR , TEM , and SEM . The surface morphology was spherical with 15–26 nm as particle size. The doped titanium oxide (Co/TiO 2 ) nanomaterial was used for photodegradation of amido black dye in water. The maximum photodegradation of amido black obtained was 90%. The values of free energy and enthalpy were negative, indicating spontaneous photodegradation of amido black dye. The photodegradation of amido black dye obeyed first‐order kinetic model. The photodegradation mechanism of amido black involved adsorption of the dye on the surface of cobalt doped titanium oxide and its degradation under UV radiation. The electron (e − ) and hole (h + ) pairs were generated by Co/TiO 2 , which consequently generated superoxide oxygen anion and hydroxyl free radical. These species degraded amido black dye. The reported method was fast, effective, and economic, which may be utilized to remove amido black in water. The doped TiO 2 catalyst was quite stable and can be used up to 5 cycles.