Synthesis of [NiONPs-Inulin] nanocomposite to use as adsorbent in the removal of poisonous thymol blue dye from liquids

• Published in: Journal of molecular structure 2023-08, Vol.1286, p.135605, Article 135605
• Main Authors: Ibrahim, Samia M., Hassanien, Reda, Hassan, Zeinab A., Al-Assy, Waleed
• Format: Article
• Language: English
• Subjects: Inulin biomacromolecule; Nanocomposite; Removal of dyes; Thymol blue
• ISSN: 0022-2860; 1872-8014
• DOI: 10.1016/j.molstruc.2023.135605

•Synthesis of [NiO-Inulin]c in a powder form by using Sol-Gel spin coating method.•The characterization of [NiO-Inulin]C has been performed with a variety of techniques.•The adsorption of thymol blue (TB) onto [NiO-Inulin]C is controlled by second order and pseudo-first-order processes.•The removal efficiency in case of influence of pH and [TB] are 52.03 and 86.46%, respectively. Using the Sol-Gel spin coating method, a new [NiO-Inulin] nanocomposite in powder form was created as a thin film. The characterization of [NiO-Inulin]C has been performed with a variety of techniques, including Fourier Transform Infrared (FT-IR), Ultraviolet-Visible spectroscopy (UV–Vis), scanning electron microscopy (SEM), X-ray diffraction (XRD), Energy dispersive X-ray spectroscopy (EDX), and Transmission electron microscopy (TEM). FT-IR displays the characteristic bands of [NiO-Inulin]C with low intensities and a small shifting of the bands. In SEM, we observed the thymol blue dye (TB) was heavily absorbed by [NiO-Inulin]C and generated a coating of TB material on their surface. Again, XRD show the average crystallite sizes of inulin and [NiO-Inulin]C which were calculated as (19 and 33.5) nm, respectively. The shape of the nanocomposite is seen in the TEM picture as spherical shapes with particle sizes of 18 nm. It has been studied spectrophotometrically how [NiO-Inulin]C removes thymol blue (TB). It was investigated how variables including contact time, [TB], [NiO-Inulin]C dosage, temperature, and dye solution pH affected the results. So, the observed highest values of removal efficiency in case of influence of pH and [TB] are 52.03 and 86.46%, respectively. Models of the Freundlich and Langmuir isotherms were used to show how the adsorption equilibrium occurred. From experimental results the type of adsorption is endothermic process and occurs spontaneously. [Display omitted]