Synthesis, Characterization and Photocatalytic Activity of Nanostructured Copper Doped Tungsten Oxide

Santhi, Kannan; Maragatha, J.; Rani, C. Sheeja Herobin; Karuppuchamy, S.

doi:10.1166/mat.2016.1368

Cited by 2 publications

(1 citation statement)

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“…It degrades dyes and other organic contaminants into comparatively safe and simpler products using sunlight, which is a cheap and environmentfriendly energy source. [35] Various NPs based photocatalysts have been used for the degradation of various contaminants such as ZnO, [36] TiO 2 , [37] WO 3 , [38] etc. All the said photocatalysts have been used as a potent source of decontamination of dyes but the problem associated with these photocatalysts is their wider bandgaps, which makes their usage limited to UV radiation region.…”

Section: Introductionmentioning

confidence: 99%

Selenide‐chitosan as High‐performance Nanophotocatalyst for Accelerated Degradation of Pollutants

Ali

Ahmad

Khan

et al. 2020

Chemistry An Asian Journal

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Water pollution is one of the major global challenges today. Water bodies are contaminated by the heavy release of waste effluents of textile industries, which includes intensively colored dye pollutants. Herein, a ternary nanocomposite of bismuth copper selenide with small particle size and ternary metal selenide (TMS)‐chitosan microspheres (TMS‐CM) of the spherical porous surface were successfully synthesized. SEM, XRD, EDX, FTIR, and UV/Vis spectrophotometry analysis revealed the structural and morphological characteristics of the newly synthesized nanocomposites. SEM imaging showed the average diameter of TMS nanoparticle to be 33 nm. The crystal size was calculated as 6.33 nm and crystalline structure as orthorhombic using XRD findings. EDX confirmed the presence of Bi, Cu, and Se in the ternary nanocomposite. The bandgap of 1.8 eV was calculated from Tauc's plot for the TMS nanocomposite. SEM confirmed the successful synthesis of spherical TMS‐CM microspheres of porous surface morphology with an average size of 885.6 μm. The presence of chitosan microspheres in the synthesis of TMS nanocomposite was identified by FTIR spectral analysis. Furthermore, highly efficient photocatalytic degradation (up to 95.4%) of ARS was achieved within 180 min at pH 4.0 using 0.5 g of TMS‐CM in sunlight. The first‐order kinetic model fitted well to the photocatalytic decontamination of ARS using TMS‐CM with a rate constant of 6.1x10−2 min−1. The TMS‐CM gave attractive results and high efficiency in photocatalytic degradation of ARS dye after reusing and regeneration of up to seven successive cycles. The newly synthesized nanophotocatalyst could be efficiently used for the decontamination of dye polluted water from textile industries.

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