AI Article Synopsis
- * The methodology involved an ultrasonic sol-gel process to create a smooth film coating of rGO and TiO on ACF, which enhanced the separation of electron-hole pairs crucial for photocatalysis.
- * Results demonstrated that the optimized composite achieved up to 85% toluene removal under UV light, outperforming individual components, thanks to a synergistic effect rather than just additive performance.
Article Abstract
The toluene poses a serious threat to the atmospheric environment and human health. Herein, the reduced graphene oxide (rGO)/TiO immobilized on the activated carbon fiber (ACF) are fabricated by ultrasonic assisted sol-gel impregnation method to photodegrade dynamic toluene. Characterizations of rGO/TiO/ACF composites reveal that the majority of graphene oxide (GO) is reduced to rGO and rGO/TiO is evenly loaded onto the ACF surface in the form of a smooth film. Furthermore, the photoelectrochemical experiments demonstrate both rGO and ACF can enhance significantly the separation efficiency of electron-hole pairs. The maximum removal efficiency of rGO/TiO/ACF-0.75% can be up to 85% under ultraviolet irradiation. The rGO/TiO/ACF exhibits more excellent adsorption and photodegradation activity for dynamic toluene than both rGO/TiO and ACF due to the synergetic effect rather than a simple linear combination of the rGO/TiO and ACF for toluene conversion. The possible photodegradation pathway is proposed according to intermediates measured by GC-MS, and adsorption coupling photocatalytic mechanisms are discussed.
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