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Title: Photocatalytic activity of natural clay Bentonite supported ZnWO4
Authors: Ida, G
Thirumalai, K
Swaminathan, M
Easwaramoorthy, D
Keywords: Bentonite clay;Zinc tungstate (ZnWO4);Microflakes;Heterostructure;Basic dyes
Issue Date: Jun-2019
Publisher: NISCAIR-CSIR, India
Abstract: Natural clay Bentonite supported ZnWO4 has been successfully synthesized through hydrothermal-thermal decomposition method. The experimental results reveal that 12 wt% of Bentonite supported ZnWO4 exhibited higher photocatalytic activity for the degradation of two basic dyes (Rhodamine-B (Rh-B) and Methylene Blue (MB) under UV light than prepared ZnWO4. Bentonite-ZnWO4 (BZW) was characterized by X–ray powder diffraction (XRD), field emission scanning electron microscopy (FE–SEM), energy dispersive spectroscopy (EDS), field emission transmission electron microscopy (FE–TEM), X-ray photo electron spectroscopy (XPS), photoluminescence spectroscopy (PL), UV–Vis diffuse reflectance spectroscopy (DRS) and BET surface area analysis. FESEM images exhibit the formation of microflakes, which have been joined together by an edge-to-flat-surface conjunction. From the BET analysis it has been found that BZW has higher surface than prepared ZnWO4. As synthesized Bentonite supported ZnWO4 has high recyclability for four successive cycles.
Page(s): 637-644
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.58A(06) [June 2019]

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