عنوان مجله
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PROGRESS IN REACTION KINETICS AND MECHANISM
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کلیدواژهها
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Ag3VO4–AgBr, fluorapatite, ionic liquid, carboxymethyl cellulose,
Acid Blue 92, photodegradation
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چکیده
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Ag3VO4–AgBr nanoparticles were loaded on fluorapatite (FA) and carboxymethyl cellulose
(CMC) supports by an ionic liquid-mediated precipitation method and used as effective
visible light-driven photocatalysts for the degradation of Acid Blue 92 (AB92) azo dye as
a typical wastewater. The products were characterised by powder X-ray diffraction (XRD),
diffuse reflectance spectroscopy, FTIR, scanning electron microscopy (SEM) and nitrogen
adsorption–desorption isotherms using Brunauer–Emmett–Teller (BET) analysis. Author: is
the previous sentence OK? The XRD patterns confirmed the formation of Ag3VO4 and AgBr
crystalline phases. Moreover, the SEM images indicated that the photoactive agents were
homogeneously dispersed on the surface and the average size of the particles was between 45
and 95 nm. During the treatment time, the photogenerated electron–hole pairs reacted with the
species in the solution and produced OH•, HO2• and O2•– species which attacked the organic
pollutants and destroyed the crucial bonds. Recycling experiments confirmed that the CMCbased
photocatalyst was more active during the first time of using while the FA analogue was
determined to be sufficiently active after five cycles of usage.
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