Resumo

FARD, Behzad Hazizadeh; KHOJASTEH, Roya Ranjineh  e  GHARBANI, Parvin. Photocatalytic Degradation of Direct Red 16 Dye using Ag/Ag₃VO₄/AgVO₃/GO Nanocomposite. S.Afr.j.chem. (Online) [online]. 2020, vol.73, pp.1-8. ISSN 1996-840X.  http://dx.doi.org/10.17159/0379-4350/2020/v73a01.

In this research, synthesized Ag NPs/Ag₃VO₄/AgVO₃/GO was applied as a visible-light sensitive photocatalyst for photocatalytic degradation of Direct Red 16 dye (DR16) from aqueous solutions. The synthesized nanocomposite was analyzed by XRD, FESEM, TEM, EDX and Dot mapping. The effect of DR16 dye concentration, AgNPs/Ag₃VO₄/AgVO₃/GO dosage, time and pH on photocatalytic removal of DR16 were studied. Results revealed thatpH, dosage and DR16 concentration are more important parameters than time on photocatalytic removal of the dye. The results indicate that 58.98 % of DR16 removal was obtained under the following optimized conditions: DR16 concentration = 32 mg L^-1; Ag NPs/Ag₃VO₄/AgVO₃/GO dosage = 0.2 g 50 mL^-1; pH = 4.5; 300 W visible light for 155 min. So, it was concluded that the new nanocomposite can be used as an efficient visible-light photocatalyst for degradation of Direct Red 16 dye.

Palavras-chave : Ag NPs/Ag₃VO₄/AgVO₃; Direct Red 16; graphene oxide; visible light.

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