可循环竹纤维/TiO2复合材料的制备与光催化性

 将再生竹纤维加入氟钛酸铵与硼酸的混合溶液中，经水热法合成，得到纤维素/TiO₂复合材料。以紫外光为光源，研究纤维素/TiO₂复合材料对甲基橙水溶液的催化降解性能。通过FT-IR、XRD、SEM等对纤维处理前后进行化学结构和微观形貌表征，结果表明：TiO₂与纤维素形成的氢键等分子间作用力使TiO₂被吸附到纤维素表面上，复合材料出现528 cm^-1的O-Ti-O键的吸收峰。在紫外光照射60 min下，复合材料对甲基橙水溶液的光催化降解率为95.9%,与纯TiO₂相当；复合材料可反复降解甲基橙水溶液5次。本实验合成的复合材料为污水处理提供了一种简单、低成本、环境友好的方法。

Preparation and photocatalysis of recyclable bamboo cellulose/titanium dioxide composites

The TiO₂/cellulose composites were successfully fabricated by in situ synthesis of TiO₂ nanoparticles in the regenerated bamboo cellulose fibers using the ammonium fluoride titanate and boric acid mixture. The catalytic degradation performance of composites on the methyl orange solution was studied by ultraviolet light source. The structure and properties of the samples were characterized by using Fourier-transform infrared spectroscopy(FT-IR), X-ray diffraction(XRD), scanning electron microscopy(SEM). The results show that a strong interaction between the hydroxyl groups of cellulose and TiO₂ nanoparticles through hydrogen bond generated immobilization of TiO₂ nanoparticles on the cellulose surface. The absorption peaks at 528 cm^-1 were assigned to the O-Ti-O stretching, respectively. The photocatalytic degradation ratio of methyl orange solution was comparable to the pure TiO₂ power, up to 95.5% under UV light for 60 min. Moreover, it could degrade of methyl orange 5 times over and over again, leading to a simple, low-cost and environment friendly approach for application in the fields of sewage treatment.