Mesoporous Nano-Sized BiFeVOx.y Phases for Removal of Organic Dyes from Wastewaters by Visible Light Photocatalytic Degradation

Abstract

With an increasing demand for industrial dyes in our daily lives, water conditions have become worse. Recently, the removal of such environmentally hazardous pollutants from wastewaters through photocatalytic degradation has been drawing increased attention. Three mesoporous nanophases of BiFeVOx.y as (Bi2FeIIIV1−yO5.5−y) visible light photocatalysts were synthesized in this study using ethylene glycol-citrate sol-gel synthesis combined with microwave- assisted calcination. X-ray diffraction (XRD), differential thermal analysis (DTA), FTIR spectroscopy, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy coupled with energy dispersive X-ray spectrometry (SEM-EDS), nitrogen adsorption-desorption isotherms, and UV-Vis diffuse reflectance spectrophotometry (UV-Vis/DRS) were used to characterize the BiFeVOx.y photocatalysts. The visible light-induced photocatalytic activities of the BiFeVOx.y phases were evaluated by the degradation of methylene blue (MB) dye in aqueous solution at pH ~10.0. The results of this study show that the combination of doping strategy with the utilization of advanced synthesis methods plays an important role in improving the structure and surface properties of BiFeVOx.y phases, and thereby enhancing their adsorption and photocatalytic efficiencies. The synthesized mesoporous tetragonal γ-BiFeVOx.y nanophase has been proven to be a potential visible-light photocatalyst for the degradation of organic dyes.

ZnO/Zn(OH)2 nanoparticles and self-cleaning coatings for the photocatalytic degradation of organic pollutants

“…The 20th-century industrial revolution has transformed the lifestyle but deteriorated the environment by polluting the air and aquifers. Industrial wastewaters containing harmful and nonbiodegradable organic pollutants such as dyes and pigments (Berradi et al, 2019;Gürses et al, 2021;Orozco et al, 2022), drugs and pharmaceuticals (Akkari et al, 2018;Al-Areqi et al, 2022), etc. Contaminate surface and groundwater sources leading to health risks.…”

BiMeVOxes: From Polycrystalline Electrolytes for SOFCs to Mesoporous Nano-sized Structures as Efficient Photocatalysts

“…The highly pronounced photocatalytic efficiency of mesoporous tetragonal γ-BiFeVOx .15 nanophase indicates that the photocatalytic performance of BiMeVOxes with a layered perovskite structure can be further improved by the doping strategy [5,6]. Therefore, the combination of doping strategy with such facile synthesis method plays an important role in improving the structure and surface properties of BiFeVOx.…”

Removal of Organic Pollutants with Polylactic Acid-Based Nanofiber Composites

“…Organic dyes that are widely discharged into the aqueous environment have a serious impact on human health, with cases of teratogenicity and cancer diagnoses becoming more commonplace [ 1 , 2 ]. As a result, researchers have become committed to finding a material with high adsorption capacity that can adsorb pollutants from the aqueous environment without having any negative impact [ 3 ].…”