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通过两步水热方法,在活性碳纤维上依次沉积了锐钛矿型TiO_2纳米粒子及金红石型TiO_2纳米棒,SEM及XRD实验结果表明:在纤维表面预沉积锐钛矿型TiO_2纳米粒子有助于后续金红石型TiO_2纳米棒的生长。随着纳米棒的生长,纳米粒子的质量分数下降。与单纯锐钛矿型TiO_2纳米粒子负载的纤维相比,纳米棒生长时间2.5h相应的混晶TiO_2负载的活性碳纤维显示了对亚甲基蓝较高的光催化活性。在对混晶TiO_2负载的纤维用辛基三甲氧基硅烷处理后,纤维毡的表面显示超疏水性,并且水接触角随纳米棒生长时间的延长而增大。
The anatase TiO 2 nanoparticles and rutile TiO 2 nanorods were sequentially deposited on the activated carbon fiber by a two-step hydrothermal method. The SEM and XRD results show that pre-deposition of anatase TiO 2 nanoparticles on the surface of the fiber contributes to Growth of subsequent rutile TiO 2 nanorods. With the growth of nanorods, the mass fraction of nanoparticles decreased. Compared with pure anatase-type TiO 2 nanoparticles loaded with activated carbon, the photocatalytic activity of mixed-phase TiO 2 -supported carbon fibers showed higher photocatalytic activity for methylene blue when the nanorod growth time was 2.5h. The surface of the fiber mat showed superhydrophobicity after treated with octyltrimethoxysilane on the mixed crystalline TiO 2 -loaded fibers, and the water contact angle increased with the growth of nanorods.