Photocatalytic evaluation of synthesized MnO2/Fe3O4 NCs by Q. infectoria extract for removal Ni(II) and phenol: Study phytochemical, kinetics, thermodynamics, and antibioactivity

• Published in: International journal of biological macromolecules 2023-12, Vol.253, p.127400-127400, Article 127400
• Main Authors: Golabiazar, Roonak, Yusif, Safia Yasin, Qadir, Chnin Najat, Abduljabar, Rihan S., Othman, Karwan Ismael, Omar, Faeza Burhan
• Format: Article
• Language: English
• Subjects: adsorption; antioxidants; Bioactivity; colorimetry; endothermy; irradiation; Kinetics; nanocomposites; nanoparticles; phenol; photocatalysis; Photocatalyst; Phytochemical analysis; phytochemicals; plant extracts; polyphenols; Q. infectoria galls; Quercus infectoria; sorption isotherms; species; stabilizers; temperature; Thermodynamic; thermodynamics
• ISSN: 0141-8130; 1879-0003
• DOI: 10.1016/j.ijbiomac.2023.127400

In the present study, the plant extract of the Quercus infectoria galls was used as a reducing, capping, and stabilizer agent for green synthesized MnO2 nanoparticles (NPs) and MnO2/Fe3O4 nanocomposites (NCs) due to its reduction ability from polyphenol and antioxidant content. The green synthesized nanomaterials have been characterized by various techniques such as FTIR, UV–vis, XRD, SEM, EDS, and TEM. The average size of about 7.4 and 6.88 nm was estimated for the NCs crystals of SEM images and XRD analysis by the Scherrer and Williamson-Hall methods. The green synthesized MnO2/Fe3O4 NCs (dosage: 0.1 g) have shown high photocatalytic activity for the removal of Ni(II) in acidic and basic solutions under visible irradiation (220 V lamp). The removal efficiency for the Ni(II) solution (3.6 × 10−3 M) at pH = 3 was increased to pH = 12 from 56 % to 98 %. The oxidase-like activity of MnO2/Fe3O4 NCs at different dosages (0.05, 0.1, and 0.15 g) for the removal and colorimetric of phenol (1 g/40 mL) in the presence 4-AAp (1 g) was seen after only 28, 13, and 5 s, respectively. The kinetic evaluation results showed the pseudo-second-order kinetics model closely matched the adsorption capacity theoretical values qe,cal (578.03, 854.70, 892.85, and 917.43 mg.g−1) and experimental values qe,exp (521.84, 839.74, 887.86, and 913.22 mg.g−1) at different initial pH solution (3−12) for Ni(II) removal. In addition, the investigation of isotherm models revealed that the Langmuir model (R2 = 0.9955) explains a better estimate for a monolayer and favorable removal of Ni(II) ions onto NCs. Also, the low Temkin constant, BT