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以钛酸四丁酯为前驱体,醋酸纤维素为模板纤维,丙酮/N,N-二甲基乙酰胺为溶剂,通过静电纺丝,水解和450℃煅烧制备了直径约为80nm的锐钛矿型TiO2纳米纤维.通过扫描电镜(SEM)、透射电镜(TEM)、X射线衍射(XRD)和N2吸脱附法表征了TiO2纳米纤维的形貌、直径大小、晶态、比表面积、孔结构及分布.研究表明该纳米纤维由大小为9.2nm的颗粒组成,纤维内含有大量直径为1.7～21nm的介孔.它具有与直径为25nm的商业化DegussaP25相似的高比表面积,约为50m2/g.研究了TiO2纳米纤维对有机小分子化合物罗丹明B(RhB)和苯酚的光催化降解.结果表明:以6mg/L的RhB和10mg/L的苯酚水溶液为母液,以质量分数为0.05%的TiO2纳米纤维膜为催化剂,在500W的紫外灯照射下,2h内约90%的RhB和75%的苯酚能被光催化降解.
Tetrapropyl titanate as precursor, cellulose acetate as template fiber, acetone / N, N-dimethylacetamide as solvent, through electrospinning, hydrolysis and calcination at 450 ℃ to prepare a diameter of about 80nm anatase The characteristics of TiO2 nanofibers were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and N2 adsorption-desorption method.The results showed that the morphology, diameter, The results show that the nanofibers consist of particles with a size of 9.2 nm and contain a large number of mesopores with a diameter of 1.7-21 nm which has a similar high specific surface area to that of the commercial Degussa P25 with a diameter of 25 nm of about 50 m2 / g. The photocatalytic degradation of organic small molecule compound RhB and phenol by TiO2 nanofibers was studied. The results showed that when RhB and 6 mg / L aqueous phenol solution were used as the mother liquor and the mass fraction was 0.05 % TiO2 nanofibrous membrane as a catalyst, under the irradiation of 500W UV lamp, about 90% of RhB and 75% of phenol can be photocatalytically degraded within 2h.