Enhanced photocatalytic activity of metal oxides/β-cyclodextrin nanocomposites for decoloration of Rhodamine B dye under solar light irradiation

Abstract

We present the photocatalytic decoloration of Rhodamine B (RhB) dye with the nanocomposites such as TiO 2 , ZnO, TiO 2 /b-cyclodextrin (b-CD) and ZnO/b-CD. Band gap energy of nanocomposites was calculated by UV-DRS analysis and the results showed that the band gap energy of ZnO/b-CD nanocomposite is lower than that of other catalysts. The microstructures of the nanocomposites have been characterized by PXRD and FE-SEM analyses. The results showed that crystallinity and surface morphology of metal oxides (MO) (say, TiO 2 and ZnO) are not changed in MO/b-CD nanocomposite systems. GC-MS results showed that the photocatalytic decoloration of RhB follows the steps such as N-deethylation, cleavage of chromophore and mineralization of dye.Keywords RhB Á TiO 2 Á ZnO Á TiO 2 /b-CD Á ZnO/b-CD

Photocatalytic Degradation of Rhodamine B Dye in Wastewater Using Gelatin/CuS/PVA Nanocomposites under Solar Light Irradiation

“…Rhodamine B is also an important representative of xanthene dyes, and it is usually used as a dye laser material because of its good stability. In recent years, there are many research works focusing on the degradation mechanism of RhB [11] [12] [13], most of them are concerned the mechanism under visible illumination, and N-de-ethylation of RhB is the main degradation mechanism. Therefore, the control against dye wastewater pollution is an important issue to tackle throughout the world.…”

Palladium nanoparticles immobilized on cyclodextrin‐decorated halloysite nanotubes: Efficient heterogeneous catalyst for promoting copper‐ and ligand‐free Sonogashira reaction in water–ethanol mixture

“…The high catalytic activity of the catalyst can be attributed to the presence of both HNTs and CD. According to previous reports, CD can promote the reaction rate through formation of inclusion complexes with hydrophobic guests and improving their solubility in aqueous phase and consequently increasing the yield of the reaction. On the other hand, HNTs have been reported as efficient supports for immobilization of nanoparticles .…”

Designing of Fe2O3/GO heterostructure with enhanced photocatalytic activity and biological applications

“…Assorted water/wastewater treatment practices is dynamic in the past, which may not be much safer and has faced numerous failures while trying to attain thorough eradication of contaminants in water with toxic organic/in-organic trace metals and dyes [7,8]. The systematic modification of organic/synthetic dye into effect less small molecular end-products, simultaneously, stabilization of heavy metals has attracted the researchers for past twenty years [9]. Graphene oxide (GO) with iron oxide (Fe 2 O 3 ), materials has attracted researchers due to its multi-tasking nature, flexibility, enormous mechanical stiffness, huge surface area, and stable chemical and physical properties and outstanding biocompatibility [10,11].…”