• 关键词：TiO₂纤维  光催化  X-3B

• 基金项目：江苏省自然科学基金(No.BK2009390);南京理工大学自主科研基金(No.2010GJPY087)

• 刘和义
• 南京理工大学材料科学与工程学院,南京 210094

• 裴石光
• 南京理工大学材料科学与工程学院,南京 210094

• 刘贵双
• 南京理工大学材料科学与工程学院,南京 210094

• 陈炎
• 南京理工大学材料科学与工程学院,南京 210094

• 摘要：采用溶胶-凝胶法及水蒸汽活化热处理工艺制备了15%(质量分数)SiO₂掺杂的TiO₂纤维,并利用SEM、XRD和HRTEM对其结构进行了表征.同时,以活性艳红X-3B染料水溶液为降解对象,研究了热处理温度、溶液pH值、紫外光源、溶液浓度等因素对TiO₂纤维光催化活性的影响.结果表明,所制得的TiO₂纤维为锐钛矿相,直径约为5~10 μm;其最佳热处理温度为700 ℃,且在强酸(pH=2)或强碱(pH=14)条件下均表现出良好的光催化活性,并对不同浓度的X-3B溶液都有良好的降解效果,同时TiO₂纤维也具有良好的可重复使用性.

• Abstract：TiO₂ fibers doped with 15% SiO₂ were prepared by using sol-gel method followed by heat-treatment under steam atmosphere. The structures of the as-prepared TiO₂ fibers were characterized by SEM, XRD and HRTEM. Photocatalytic activities of the TiO₂ fibers were investigated by decomposing the active brilliant red X-3B dye aqueous solution. The effects of heat-treatment temperature, pH value, UV light source, and the X-3B solution concentration on the photocatalytic activities of TiO₂ fiber were investigated. The results showed that the fibers were anatase TiO₂ with diameters in the range of 5~10 μm. Optimal heat-treatment temperature for preparing TiO₂ fibers was 700 ℃. The TiO₂ fibers exhibited high photocatalytic efficiency on the degradation of X-3B solutions of different concentrations in condition of strong acid (pH=2) and strong alkaline (pH=14). In addition, the fibers showed good reusability.

• Key words：TiO₂ fibers  photocatalysis  X-3B

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