Enhanced Visible-Light Photocatalytic Performance of Electrospun rGO/TiO2 Composite Nanofibers
Enhanced Visible-Light Photocatalytic Performance of Electrospun rGO/TiO2 Composite Nanofibers
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DOI：
10.1021/acs.jpcc.6b08840
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发表时间：
2017-01-12
影响因子：
3.7
通讯作者：
Bechelany, Mikhael
中科院分区：
文献类型：
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作者：
Nasr, Maryline;Balme, Sebastien;Bechelany, Mikhael
利用静电纺丝技术成功制备了还原氧化石墨烯（rGO）/二氧化钛（TiO2）复合纳米纤维作为光催化材料。具有受控比例的 rGO 的初纺纳米纤维在管式炉中在氮气下于 500 摄氏度下退火。结构；-形态和光学表征证明了 rGO 成功掺入 TiO2 纳米纤维中。这些纳米复合材料的光催化应用性能已得到评估。 rGO片材的存在将TiO2 NF的带隙能从3.2降低至2.9。因此，在甲基橙（MO）的光降解中，与商业TiO2-P25相比，rGO/TiO2（2wt％）复合NF的反应速率显着提高。此外，rGO/TiO2（2 wt%）复合NFs降解MO的动力学比商业TiO2高6倍。因此，复合材料 rGO/TiO2 的光催化活性显着提高了可见光光响应，并改善了 TiO2 光生电子空穴对的分离。
Reduced graphene oxide (rGO)/titaniurn dioxide (TiO2) composite nanofibers as photocatalytic materials were successfully elaborated' by using electroSpinning. The as-spun nanofibers with controlled ratio of rGO were annealed at 500 degrees C under nitrogen in a tubular furnace. Structural;-Morphological, and optical characterizations demonstrate the success of rGO incorporation in the TiO2 nanofibers. The performances of these nanocomposites, for photocatalytic application have been evaluated. The presence of rGO sheets decreases the band gap energy of TiO2 NFs from 3.2 to 2.9 Hence, in the photodegradation of methyl orange (MO), a significant enhancement in the reaction rate was observed with rGO/TiO2 (2 wt %) composite NFs compared to commercial TiO2-P25. In addition, the kinetic of MO degradation by rGO/TiO2 (2 wt %) composite NFs is 6 times higher than that by commercial TiO2. Thus, the photocatalytic activity of the cOmposites rGO/TiO2 significantly increases the visible-light photoresponse and improves the separation of photoinduced electron-hole pairs of TiO2.