活性炭纤维负载TiO2催化剂的制备及其电催化性能

采用溶胶-凝胶法制备了活性炭纤维负载TiO₂催化剂（TiO₂/ACF），并通过SEM和XRD等手段对TiO₂/ACF进行了表征。以邻苯二甲酸二甲酯（DMP）为目标降解物，考察了催化材料的电催化活性。实验结果表明：在反应温度为25 ℃、初始DMP质量浓度为100.0 mg/L、电解质Na₂SO₄质量浓度为100 mg/L、电流密度为62.5 mA/cm²、电极板间距为4 cm的条件下，经过40 min的降解，DMP质量浓度为1.8 mg/L，DMP去除率为98.2%;TiO₂/ACF在反应过程中可以原位再生，经6次重复使用后仍保持很高的催化活性，对DMP的去除率仍达90%以上。

Preparation of TiO2 Loaded Activated Carbon Fiber and Its Electro-catalytic Activity

TiO₂ loaded activated carbon fiber catalyst （TiO₂/ACF） was prepared by sol-gel-adsorption method and characterized by SEM and XRD. Its electro-catalytic activity was investigated using dimethyl phthalate （DMP） as objective decomposition substance. The experimental results show that：Under the conditions of reaction temperature 25 ℃,initial DMP mass concentration 100 mg/L,electrolyte Na₂SO₄ mass concentration 100 mg/L,current density 62.5 mA/cm²,electrode interspace 4 cm,and reaction time 40 min,the DMP mass concentration is reduced to 1.8 mg/L with 98.2% of removal rate;The catalyst can be regenerated in situ,and after 6 times of reuse,it can remain a higher activity with over 90% of DMP removal rate.