Enhanced photodegradation of 2,4-dichlorophenoxyacetic acid by the heterojunction of TiO2 and Fe-MCM 41 material
Year: 2025
Type: article
Abstract: The aim of this study was to synthesize the TiO₂/Fe-MCM-41 heterojunction material using the ultrasonic method for the photodegradation of 2,4dichlorophenoxyacetic acid (2,4-D) under light irradiation.The synthesized materials were characterized using various techniques, including XRD, FE-SEM, UV-Vis DRS, and EDX.These analyses confirmed that TiO₂ particles were uniformly dispersed on the Fe-MCM-41 support.The integration of TiO₂ with Fe-MCM-41 enhanced visible light absorption, which in turn improved photocatalytic activity under light irradiation.Among the tested conditions, the optimal performance was observed with a TiO₂ loading of 30% (corresponding to a mass-to-volume ratio of 0.5g/L), an initial 2,4-D concentration of 40ppm, a pH of 4.2, and an illumination time of 210 minutes.Under these conditions, the photodegradation efficiency exceeded 97%.Additionally, radical scavenging experiments indicated that superoxide radicals (O₂•⁻), hydroxyl radicals (•OH), and photogenerated holes (h⁺) played critical roles in the photocatalytic degradation process.The TiO₂/Fe-MCM-41 catalyst also demonstrated stable performance over four consecutive cycles, highlighting its potential for repeated use in photocatalytic applications.
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4414741516
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