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التكسير الضوئية المحفزة لصبغة Orange G بواسطة العامل المساعد المزدوج Nb2O5/Sb2O3 ودراسة الحركيات == Photocatalytic degradation of Orange G dye by using coupled Nb2O5/Sb2O3 and study the kinetic
Author name:
مروة محمد علي عبيد حسان
Supervisor name:
ندى يحيى فيروز
General topic:
Chemistry
Specific topic:
Chemistry
Degree:
Master
University:
University of Babylon - College Of Science
Language:
English
University location:
Babylon
Abstract:
This study includes the preparation of new coupled Nb2O5/Sb2O3 by using dry mixing methods for Niobium pentoxide and Antimony trioxide at different ratios of (0.25 : 0.75 ,0.5 : 0.5 and 0.75 : 0.25) W/W % and calcination at different temperature 400 °C , 500 °C and 600 °C . The prepared catalyst was characterized by X-ray diffraction , Fourier Transform Infrared Spectroscopy Technique (FT-IR) , Atomic Force Microscopy (AFM), UV-Vis spectroscopy and measure band gap energy for the prepared coupled catalyst. The photocatalytic degradation of Orange G dye was evaluated under using high pressure mercury lamp after determining the wavelength of Orange G dye at λ max (475 nm). | The result showed that percentage of new coupled Nb2O5/Sb2O3 (0.5 : 0.5) at calcination temperature equal to 600 °C higher activity than other ratio at different calcination temperature. The limited optimum conditions of photocatalytic degradation of Orange G dye by the prepared coupled catalyst have been done using different parameters includes the best of weight of catalyst, initial of dye concentration , effect of pH solution .Also the effect of temperature has been studied to find the active energy (Ea) of photocatalytic reaction by new coupled Nb2O5/Sb2O3 equal to 26.109 KJ/mol . | The dye degradation followed pseudo first order kinetic. Also study effect addition of hydrogen peroxide and recycle of the catalyst.
