Removal of rhodamine blue dye from wastewaters by using perovskite@2D-layered nanostructured LaCoO3@g-C3N4 as super-nanosorbent material

Osamah Aldaghri; Khalid H Ibnaouf; Hajo Idriss; Abueliz Modwi; Mohamed Bououdina; George Z Kyzas

doi:10.1016/j.scitotenv.2023.167685

Removal of rhodamine blue dye from wastewaters by using perovskite@2D-layered nanostructured LaCoO₃@g-C₃N₄ as super-nanosorbent material

Sci Total Environ. 2024 Jan 1:906:167685. doi: 10.1016/j.scitotenv.2023.167685. Epub 2023 Oct 13.

Authors

Osamah Aldaghri¹, Khalid H Ibnaouf², Hajo Idriss³, Abueliz Modwi⁴, Mohamed Bououdina⁵, George Z Kyzas⁶

Affiliations

¹ Physics Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 13318, Saudi Arabia. Electronic address: odaghri@imamu.edu.sa.
² Physics Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 13318, Saudi Arabia.
³ Physics Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 13318, Saudi Arabia; Deanship of Scientific Research, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, Saudi Arabia.
⁴ Department of Chemistry, College of Science and Arts, Qassim University, Ar Rass, Saudi Arabia.
⁵ Department of Mathematics and Science, Faculty of Humanities and Sciences, Prince Sultan University, Riyadh, Saudi Arabia. Electronic address: mbououdina@psu.edu.sa.
⁶ Hephaestus Laboratory, Department of Chemistry, International Hellenic University, GR-65404 Kavala, Greece.

PMID: 37820793
DOI: 10.1016/j.scitotenv.2023.167685

Abstract

To address water polluting hazardous and toxic dyes menace, we developed a novel LaCoO₃@g-C₃N₄ composite, characterized it, and then employed it to adsorb rhodamine blue (RhB) from aqueous solutions. The synthesized nanomaterials consisted of LaCoO₃ and Co₃O₄ phases of crystallite sizes 43.29 and 42.63 nm beside the nitride, with a surface area of 66.67 m².g^-1, and C, N, La, O, and Co as elemental composition, as confirmed by X-ray diffraction, BET and EDX analysis respectively. Batch sorption experiments were carried out to evaluate the performance of LaCoO₃@g-C₃N₄ nanopowder on RhB dye removal where the experimental data well fitted the Langmuir isotherm and the pseudo-second-order kinetics models, thus validating monolayer chemisorption via hydrogen bonding and π- π electrostatic interaction. The findings indicated a high adsorption capacity of 1226 mg.g^-1 and that the nanosorbent possessed good stability since it can be regenerated and reused efficiently with a very low retention rate of 90.8 %.

Keywords: Adsorption capacity; Fabrication; LaCoO(3)@g-C(3)N(4); Mechanism; RhB dye removal.