Preparation and properties of NaTaO3 deposited on carbon fiber photocatalytic composites
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摘要: 以聚丙烯腈基碳纤维(CF)为基体,TaCl5和乙酸钠为原料,十六烷基三甲基溴化铵(CTAB)为表面活性剂,通过溶胶-凝胶法和浸渍提拉法将纳米NaTaO3薄膜负载于CF上,制备得到高效光催化特性的复合材料。采用SEM、TEM、XRD等表征了NaTaO3-CF的形貌和结构,以罗丹明B (RhB)溶液为目标降解物,测试了NaTaO3-CF复合材料的光催化性能。结果表明:所制备的NaTaO3-CF复合材料具备良好光催化活性和重复使用稳定性,暗中吸附30 min、光照80 min时,对RhB的去除率为99.35%,5次循环使用后,去除率为89.17%,其光催化反应过程符合伪一级反应动力学模型。Abstract: The NaTaO3-carbon fiber (CF) composite with excellent photocatalytic activity was prepared through sol-gel method combined with dip-coating technique by using TaCl5 and sodium acetate as the raw materials, cetyl trimethyl ammonium bromide (CTAB) as the surfactant. The morphology, crystalline phase and photocatalytic properties of NaTaO3-CF composites were investigated by SEM, TEM and XRD. The dye rhodamine B (RhB) was used as a model contaminant to evaluate the photocatalytic activity of NaTaO3-CF composites. The results indicate that NaTaO3-CF composites have excellent photocatalytic performance and the removal ratio of RhB is achieved 99.35% under dark adsorption for 30 min and irradiation for 80 min. The NaTaO3-CF composites also present favorable stability and photocatalytic activity after recycling, the removal ratio of RhB is remained above 89.17% after five cycles. The photodegradation of RhB is in accordance with the pseudo first order reduction kinetics model and could be described by this kinetic model.
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Key words:
- nano NaTaO3 /
- carbon fiber /
- surfactant /
- composites /
- photocatalytic
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