ABSTRACT

Solar photocatalytic degradation of reactive azo dye such as reactive orange 30 (RO 30) using Fe2O3/W, N codoped ZnO were studied. A series of Fe2O3/W, N-codoped TiO2 composites with different weight ratio (2 wt%, 4 wt%, 6 wt%, 8 wt%, and 10 wt%) were prepared dispersed method. The photocatalyst powders were characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), UV–vis diffuse reflection spectroscopy (DRS) and Photoluminescence emission spectra (PL). Their solar photocatalytic activities were evaluated by the degradation of RO 30. The results generally show that the binary semiconductors Fe2O3/W, N codoped ZnO, with matching band potentials, exhibit better photocatalytic properties than the single phase Fe2O3, W, N codoped ZnO and ZnO. The effective electron–hole separation both at the chemically bonded interface and in the two semiconductors is believed to be mainly responsible for the increased photocatalytic performance of composites. The formation of chemically bonded interfaces between Fe2O3 and W, N codoped ZnO particles makes the interparticle charge transfer more spatially available and smoother, which is significant to enhance the photocatalytic activity. Reusability of the Fe2O3/W, N codoped ZnO powder in degradation of RO 30 was also possible as it gave a high consistent value of decolorization percentage (>90 %) even after the sixth repeated usage. Keywords: Fe2O3/W, N codoped ZnO, surface morphology, sol-gel route, Photocatalytic Degradation, Reactive Orange 30 and Natural Sun Light
Publication date: 01/06/21

https://ijbpas.com/pdf/2021/June/MS_IJBPAS_2021_5515.pdf

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https://doi.org/10.31032/IJBPAS/2021/10.6.5515