Kinetic investigation of ph otocatalytic decolorization of a metach romatic dye usin g nano-structure zinc oxide at buffer solution

In photocatalytic decolo rization, lig ht is absor bed by an photocatalyst . The photo catalytic activity d epends on the ability o f the photocatalyst to create electron –hole pairs, which gen erate free radicals (hydroxyl radicals: •OH) able to degrade a target sub stance. Photocatalytic degradation (or mineralizatio n) of che mical pollutants, such as environ mentally toxic organic and inorganic c ompounds under aerated conditions have extensively been investigated in recent years [۱–۵]. In this work, photocatalytic de gradation and kinetic st udies of a m etachromatic dye (thionine) was carried o ut using a natase nano-structure zinc oxide at buffer sol ution in a photocatalytic reactor under irradiation with ۴۰۰W high pressure mercury la mp.

کلیدواژه ها:

Photocatalytic ، decolori zation ، Laut h's violet ، Kinetic