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

Abstract

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.

Covalent and Non-covalent Functionalized Nanomaterials for Environmental Restoration

“…The idea of designing ternary metal selenides provided the opportunity to incorporate different metals for achieving better and refined results. Nisar et al [468] prepared ternary metal selenide/chitosan microspheres and utilized them for evacuating Alizarin Red S dye. The prepared TMS-CMs were morphologically found to have an average diameter of 33 nm.…”

Efficacious elimination of crystal violet pollutant via photo-Fenton process based on Gd(2−x)La(x)Zr2O7 nanoparticles

“…The paper, textile, leather, plastic, electroplating, food processing, pharmaceutical, and agricultural sectors are just a few of the industries that have seen a rise in commerce in the contemporary period 1 , 2 . Because these sectors produce high-quality products, they are significant to society as a whole.…”

Enhanced Photocatalytic Properties of Surfactants Modified ZnO Particles Synthesized Directly via Sonochemistry Technique

“…The dumping of wastewater containing non‐degradable organic compounds, suspended solids, and an immense amount of dyes, is resistant to environmental degradation causing a series of problems such as threatening the health of human beings, genetic mutation, damage the ecological environment [1–3] . Approximately, over 10,000 types of dyes are used in industry, which poured 10–15 % into wastewater with no prior treatment [4–5] . This is an apparent environmental problem not only in developing countries but also in developed countries.…”

“…[1][2][3] Approximately, over 10,000 types of dyes are used in industry, which poured 10-15 % into wastewater with no prior treatment. [4][5] This is an apparent environmental problem not only in developing countries but also in developed countries. Therefore, it is greatly significant for making wastewater into harmless water to discharge.…”