Work

Photocatalytic removal of Cefixime using ZnO/BiOBr/Bi2S3: Suspended and immobilized on Graphite

Year: 2025

Type: article

Abstract: The ZnO/BiOBr/Bi 2 S 3 dual Z-scheme heterojunction was synthesized via the solvothermal method, and the photocatalytic removal of cefixime (CFX) was investigated using the nanocomposite. Structural and morphological studies were conducted using XRD, FTIR, Raman spectroscopy, XRF, FE-SEM, TEM, UV-Vis DRS, PL, and BET. The results indicated that the ZnO/BiOBr/Bi 2 S 3 exhibited a synergistic effect, reducing the band gap energy to 2.70 eV and enhancing charge separation in comparison with individual and binary components. The Raman peak shifts confirmed the formation of heterojunction among the components. Optimization of the mass ratio through screening experiments resulted in an optimum composition of 30 wt% ZnO to BiOBr/Bi 2 S 3 , achieving a 75% removal efficiency. CFX adsorption on the nanocomposite followed a monolayer mechanism, with a maximum adsorption capacity of 15.32 mg.g -1 . In addition, approximately 96% CFX removal was achieved using the immobilized ternary ZnO/BiOBr/Bi 2 S 3 heterojunction on graphite under optimal operating conditions. The O 2 − • and h + for the suspended and the O 2 − • and OH • for the immobilized system play the major role in CFX degradation.

Source: PLOS Water

DOI: 10.1371/journal.pwat.0000377

Authors: Asal Rahpeyma, Alireza Tamimzadeh, Mehrdad Farhadian, Ali Reza Solaimany Nazar, Shahram Tangestaninejad

Institution: University of Isfahan

Language: English

Topic: Advanced Photocatalysis Techniques

Subfield: Renewable Energy, Sustainability and the Environment

Field: Energy

Domain: Physical Sciences

SDG: Clean water and sanitation

Open Access status: gold

Estimated APC paid: $2,496