Seed-assisted thermal growth of one-dimensional TiO2 nanomaterials on carbon fibers
Seed-assisted thermal growth of one-dimensional TiO2 nanomaterials on carbon fibers
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DOI：
10.1016/j.ceramint.2016.11.138
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发表时间：
2017-02
影响因子：
5.2
通讯作者：
Sun Yinyu;Z. Zong;Zhan-Ku Li;Yun-Peng Zhao;Xianyong Wei
中科院分区：
文献类型：
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作者：
Sun Yinyu;Z. Zong;Zhan-Ku Li;Yun-Peng Zhao;Xianyong Wei
通过种子辅助热生长方法，包括“预涂覆”和“生长”过程，成功制备了在碳纤维（CF）上生长的一维（1D）TiO2纳米材料（NM），包括TiO2纳米线（NW）和TiO2纳米棒（NR）。使用场发射扫描电子显微镜（FESEM）、能谱仪（EDS）、透射电子显微镜（TEM）、X射线光电子能谱仪（XPS）和X射线衍射仪（XRD）对所获得的含TiO2-NWs的CFs（CFs/TiO2-NWs）和含TiO2-NRs的CFs（CFs/TiO2-NRs）进行了表征。此外，通过在紫外-可见光照射下降解亚甲基蓝（MB）来评估CFs/TiO2-NWs和CFs/TiO2-NRs的光催化活性。 FESEM 和 TEM 图像显示 CF 的整个表面都覆盖有垂直排列的一维 TiO2NM。 XPS和XRD分析表明TiO2-NWs和TiO2-NRs是纯金红石型TiO2。 CFs/TiO2-NWs (98.6%) 和 CFs/TiO2-NRs (96.0%) 上的 MB 转化率显着高于 CFs (5.6%) 和 CFs/TiO2-种子层 (28.4%) 上的 MB 转化率，这意味着 CFs 上覆盖的一维 TiO2NMs 可以改变 CFs 的微观结构并提供更多的光催化活性位点。 CFs/TiO2-NWs和CFs/TiO2-NRs的光稳定性测试表明，由于一维TiO2NMs在CFs上的良好固定化，它们可以重复使用。这项工作提供了一种在柔性基板上生长一维 TiO2NM 的有趣方法。
One-dimensional (1D) TiO2nanomaterials (NMs), including TiO2nanowires (NWs) and TiO2nanorods (NRs), grown on carbon fibers (CFs) were successfully prepared by a seed-assisted thermal growth method, involving “pre-coating” and “growth” processes. The as-obtained CFs with TiO2-NWs (CFs/TiO2-NWs) and CFs with TiO2-NRs (CFs/TiO2-NRs) were characterized with a field emission scanning electron microscope (FESEM), energy dispersive spectrometer (EDS), transmission electron microscope (TEM), X-ray photoelectron spectrometer (XPS), and X-ray diffractometer (XRD). Additionally, the photocatalytic activities of CFs/TiO2-NWs and CFs/TiO2-NRs were evaluated by degrading methylene blue (MB) under UV–vis irradiation. The images on FESEM and TEM show that the entire surfaces of CFs are covered with vertically aligned 1D TiO2NMs. The analyses with XPS and XRD indicate that TiO2-NWs and TiO2-NRs are pure rutile TiO2. MB conversions over CFs/TiO2-NWs (98.6%) and CFs/TiO2-NRs (96.0%) are significantly higher than those over CFs (5.6%) and CFs/TiO2-seed layer (28.4%), implying that the 1D TiO2NMs covered on CFs can change the micro-structure of CFs and provide more photocatalytically active sites. The photostability tests of CFs/TiO2-NWs and CFs/TiO2-NRs indicate that they are reusable due to the good immobilization of 1D TiO2NMs on CFs. This work provides an intriguing method for growing 1D TiO2NMs on flexible substrates.