【摘要】 以胶原纤维为模板,硫酸钛为钛源,通过Ti(Ⅳ)与胶原纤维发生配位反应,将其负载于胶原纤维上,经过煅烧除去胶原纤维模板而获得具有介孔结构的TiO2纤维。通过场发射扫描电镜、N2吸附-脱附、广角XRD衍射、分子荧光光谱等分析手段对所制备的TiO2纤维的表面结构、孔结构和晶体结构等进行表征。实验结果表明,硫酸钛与胶原纤维质量比及煅烧温度明显影响TiO2纤维的表面形貌和孔结构。当硫酸钛与胶原纤维质量比为8∶5,煅烧温度为600℃,所制备的TiO2纤维能较完整地保留天然胶原纤维的形貌和有序的介孔结构,孔径分布集中在4.3 nm。酸性橙Ⅱ的光催化降解实验表明,具有介孔结构的TiO2纤维的光催化活性明显高于无介孔结构的Degussa P25。更多还原

【Abstract】 Mesoporous TiO2 fiber was prepared using collagen fiber as the template and Ti( SO 4) 2 as the titanium source. The Ti( Ⅳ) was loaded on collagen fiber by chelation reaction,and then the mesoporous TiO2 fiber was obtained after heat-treatment to remove the template of collagen fiber. The surface morphology and pore structure of the as-prepared mesoporous TiO2 fiber were characterized by means of field emission scanning electron microscopy,N2 absorption-desorption isothermal method,wide angle XRD and photoluminescence spectra( PL). The experimental results indicated that the mass ratio of Ti( SO4) 2 to collagen fiber and calcination temperature significantly influenced the surface morphology and mesoporous structure of TiO2 fiber. When the mass ratio was 8∶5 and calcination temperature was 600 ℃,the morphology of nature collagen fiber was well preserved in the as-prepared mesoporous TiO2 fiber,and the mesoporous structure was in ordered and the pore size distribution was centered in 4. 3 nm. The photo-catalytic degradation of acid orange Ⅱ experiments indicated that the photo-catalytic activity of the as-prepared mesoporous TiO2 fiber was much higher than that of Degussa P25 without mesoporous structure.更多还原