The Influence of the Nanostructures on the Dye Adsorption in Dye Sensitized Solar Cell

Abstract

In this work, ZnO nanostructures were synthesized by two distinct routes, which consisted in grow distinct morphologies on a seed layer by Chemical Bath Deposition method (CBD) using zinc acetate dihydrate, zinc chloride, zinc sulfate heptahydrate and zinc nitrate hexahydrate as precursor solutions and Ethylenediaminetetraacetic Acid (EDTA) and ammonium chloride as complex agents. The dye Eosin Y salt was adsorbed on the ZnO nanostructures using electrophoresis. The nanostructures were characterized by Scanning Electron Microscopy (SEM), X-ray Fluorescence (XRF) and X-ray Diffraction (XRD). The amount of dye adsorbed on the film surface was evaluated by UV-vis spectrophotometry. The nanostructure prepared from the ZnAc solution presented the higher concentration of dye.

Synthesis and characterization of nano-zinc oxide fiber: adsorption of acid blue 92 dye, isotherms, thermodynamics and kinetics

“…Metal oxides and metal nanoparticles, such as MgO (Moussavi and Mahmoudi, 2009), Fe3O4/MgO nanoparticles (Salem et al, 2016), nano-ZnO (Lei et al, 2017;Zafar et al, 2019), Mnnanoparticles (Arshadi et al, 2014), Ni/Fe and Mg/Fe layered double hydroxides (Elmoubarki et al, 2017), nanofibrous metal-organic membranes (Efome et al, 2018a;Efome et al, 2018b) and modified-SiO2 nanoparticles (Patra et al, 2016) have been utilized as adsorbents to remove pollutants including dyes and metal ions from aqueous solutions. It is noted that nano-rod ZnO exhibited better adsorption efficiency compared to spherical ZnO for removal of the organic dyes (da Silva et al, 2021). Hence, attempts have been made to produce fiber-like nano-ZnO with a higher adsorption efficiency than rod-like and/or spherical nano-ZnO.…”