Electrospinning, solvothermal, and self-assembly synthesis of recyclable and renewable AgBrTiO2/CNFs with excellent visible-light responsive photocatalysis
Electrospinning, solvothermal, and self-assembly synthesis of recyclable and renewable AgBrTiO2/CNFs with excellent visible-light responsive photocatalysis
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DOI：
10.1016/j.jallcom.2016.05.103
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发表时间：
2016-10
影响因子：
6.2
通讯作者：
D. Yu;J. Bai;Haiou Liang;Chunping Li
中科院分区：
文献类型：
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作者：
D. Yu;J. Bai;Haiou Liang;Chunping Li
AgBr单键TiO 2复合纳米粒子（NPs）修饰的新型碳纳米纤维（CNFs）由于其高效的电荷分离和传输性能以及上级捕光效率，将成为制备可见光催化剂的理想纳米结构材料。本文采用溶剂热法制备了直接在Ag/CNFs上生长的TiO 2纳米粒子。由银纳米颗粒衍生的AgBr的形成通过气/固氧化反应进行。表征结果表明，AgBr敏化的TiO 2纳米粒子均匀地覆盖在CNFs表面。在可见光照射下，AgBr单键TiO 2/CNFs催化剂对MO的降解效率明显高于Ag单键TiO 2/CNFs和TiO 2/CNFs，且对不同有机物具有普适的降解能力。同时，AgBr单键TiO 2/CNFs具有一定的光化学稳定性，且易于再生。由于纳米碳纤维具有较大的长径比，所制备的复合材料易于与溶液相分离，表明AgBr敏化的纳米TiO 2负载于纳米碳纤维上在染料降解领域具有潜在的应用前景。
Novel carbon nanofibers (CNFs) modified by AgBrsingle bondTiO2composite nanoparticles (NPs) would be the most desirable nanostructure materials in preparing visible-driven catalysts because of its efficient charge separation and transport properties as well as superior light harvesting efficiency. In this study, TiO2nanoparticles grown directly on Ag/CNFs were prepared by a simple solvothermal synthesis. The formation of AgBr, which derived from Ag NPs, was carried out by the gas/solid oxidization reaction. The characterization results indicate that AgBr-sensitized TiO2NPs were uniformly covered on the surface of CNFs. Under visible light irradiation, the degradation efficiency of MO in the presence of AgBrsingle bondTiO2/CNFs was much higher than that of TiO2/CNFs or Agsingle bondTiO2/CNFs, and the as-prepared catalysts showed a universal degradation ability for different organics. Meanwhile, AgBrsingle bondTiO2/CNFs had a certain photochemical stability and could be regenerated easily. The as-prepared composites could be easily separated from the solution phase due to the large length-diameter ratio of CNFs, suggesting that the AgBr-sensitized TiO2nanoparticles loading on carbon nanofibers had a potential application in the field of dye degradation.