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Joohari, shiva, Montazerozohori, Morteza, Malekhoseini, Ameneh. (1394). Photolytic and photocatalytic decolorization of Lauth\'s violet using nano-titanium dioxide: A kinetics study. , 1(1), 39-48. doi: 10.22108/ijet.2015.15581
shiva Joohari; Morteza Montazerozohori; Ameneh Malekhoseini. "Photolytic and photocatalytic decolorization of Lauth\'s violet using nano-titanium dioxide: A kinetics study". , 1, 1, 1394, 39-48. doi: 10.22108/ijet.2015.15581
Joohari, shiva, Montazerozohori, Morteza, Malekhoseini, Ameneh. (1394). 'Photolytic and photocatalytic decolorization of Lauth\'s violet using nano-titanium dioxide: A kinetics study', , 1(1), pp. 39-48. doi: 10.22108/ijet.2015.15581
Joohari, shiva, Montazerozohori, Morteza, Malekhoseini, Ameneh. Photolytic and photocatalytic decolorization of Lauth\'s violet using nano-titanium dioxide: A kinetics study. , 1394; 1(1): 39-48. doi: 10.22108/ijet.2015.15581

Photolytic and photocatalytic decolorization of Lauth\'s violet using nano-titanium dioxide: A kinetics study

Iranian Journal of Environmental Technology 
مقاله 6، دوره 1، شماره 1، شهریور 2015، صفحه 39-48    اصل مقاله (373.24 K)
شناسه دیجیتال (DOI): 10.22108/ijet.2015.15581
نویسندگان
shiva Joohari* 1؛ Morteza Montazerozohori2؛ Ameneh Malekhoseini3
1Assistant professor of Physical chemistry, Islamic Azad University, Yasouj Branch, Yasouj, Iran
2Professor of Inorganic chemistry, Yasouj University, Iran
3M.Sc. of Inorganic chemistry, Yasouj University, Iran
چکیده
Photolysis and photocatalysis of Lauth's violet using nano-titanium dioxide at various aqueous buffer and non-buffer pHs. The effects of some various operating parameters such as initial dye concentration, medium pH, illumination time and catalyst amount have been investigated in a photoreactor equipped with high pressure mercury lamp. Spectrophotometric methods supported that the dye is almost completely decolorized. The dye decolorization obeyed from a pseudo-first-order kinetics. The observed rate constants (kobs) of direct photolysis and photocatalysis processes were evaluated for all studied pHs. Rate constants of direct photolysis at buffer were evaluated to be 3.7×10-3, 2.5× 10-2 and 3.0×10-2 min-1 for pHs of 7, 9 and 11 respectively. The rate constants of dye photolysis at non-buffer pHs were found as 8.8×10-2, 7.4×10-2, 1.1×10-1 h-1 for pHs of 5, 7 and 9 respectively. Moreover adsorption constant (KA) and degradation rate (kr) at surface for photocatalytic process were calculated at acidic, neutral and basic media.
کلیدواژه‌ها
Kinetic؛ Lauth\'s violet؛ Lauth\'s violet؛ Lauth\'s violet؛ Lauth\'s violet؛ Lauth\'s violet؛ Lauth\'s violet؛ Lauth\'s violet؛ Lauth\'s violet؛ Lauth\'s violet؛ Lauth\'s violet؛ nano-photocatalyst؛ decolorization؛ Nano؛ photocatalyst
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