Akademik Veri Yönetim Sistemi
REACTION KINETICS MECHANISMS AND CATALYSIS, 2026 (SCI-Expanded, Scopus)
A heterogeneous photo-Fenton-like system based on bismuth ferrite (BiFeO3, BFO) and oxalic acid was developed for the efficient degradation of cresol red (CR) under UVA irradiation. The BFO catalyst exhibited a rhombohedral perovskite (R3c) structure with nanoscale crystallinity, fibrous-porous morphology, and uniform elemental distribution, as confirmed by XRD, FTIR, and SEM-EDS analyses. Photodegradation experiments revealed that neither BFO nor oxalic acid alone achieved significant CR removal, whereas their combination induced a pronounced synergistic effect (synergy index, SI approximate to 3.52), reaching 88.4% degradation within 120 min using a low BFO dose of only 0.05 g L-1. Optimal operating conditions were 1.0 mM oxalic acid and pH 3.0, following pseudo-first order kinetics. Radical scavenging experiments identified hydroxyl radicals as the primary reactive species. Mechanistic analysis indicated that CR degradation proceeds through surface complexation of Fe(III) by oxalate, photo-assisted Fe(III)/Fe(II) cycling, and enhanced reactive oxygen species (ROS) generation. The system maintained high performance in natural water matrices, although elevated salinity partially reduced efficiency. A preliminary cost evaluation highlighted low reagent consumption, with energy demand identified as the main operational cost. The present study provides mechanistic insight into BFO-catalysed heterogeneous photo-Fenton processes and demonstrates their potential for sustainable water treatment applications.