纳米材料TiO2纳米管阵列(TNA)具有独特的、高度有序的阵列结构和良好的降解苯酚污染物的性能。采用电化学阳极氧化法制备TNA,以苯酚作为模拟污染物,考察了在光电协同耦合作用下TNA降解苯酚的效果及动力学规律。实验结果表明:在电流密度为17.78mA/cm2、pH=3.0的条件下,采用光电耦合降解苯酚,反应40min后质量浓度为5mg/L的苯酚去除率可达100%。反应动力学分析结果表明,苯酚的光电耦合降解过程遵循准一级动力学规律,其反应速率常数为0.1371min-1,相关系数R2为0.998。
The titanium dioxide nanotube array (TNA) has the characters of highly ordered array structure,and good degrading performance on phenol pollutants in the water.Electrochemical anodic oxidation method was used to prepare TNA.Phenol solution was selected as simulated pollutants.The effluence of phenol electrolysis degradation was investigated.The experiment also was constructed to reveal the effect and kinetics of TNA degradation of phenol by photo-electrical coupling technology.The results showed that the removal rate of 5mg/L concentration of phenol solution was 100% under the optimum condition of pH=3.0,17.78mA/cm2 current density.The results of reaction kinetics analysis showed that the phenol degradation followed the first order kinetics law and the reaction rate constant of was 0.1371min-1,R2=0.998.
[1] 杨志广,彭战辉,任加诚,等.纳米TiO2光催化剂的制备及性能研究[J].化工新型材料,2016,44(10):170-172.
[2] 史慧贤,郭剑浩,张天永.TiO2基多组分纳米光催化剂的制备及其性能研究[J].中国稀土学报,2017,35(4):478-485.
[3] 贾艳蓉,武志刚,王瑶,等.SnO2-TiO2复合半导体光催化剂制备及性能评价[J].水处理技术,2017,43(1):36-39;45.
[4] 郭凤南,史宁,吕佳佳,等.TiO2/CB-PC复合光催化剂的制备及其降解苯的研究[J].消防科学与技术,2017,36(11):1491-1494.
[5] 王兰,曾琪静.改性蛭石负载Fe、N共掺杂TiO2光催化剂的制备及可见光降解苯酚研究[J].化工新型材料,2016,44(9):107-109.
[6] 何莉娜,陈芳艳,唐玉斌.分子印迹型TiO2的制备及其对邻苯二甲酸二(2-乙基)己酯的光催化性能[J].环境工程学报,2017,11(6):3532-3538.
[7] 刘聪,刘力宁,王珅,等.纳米SiO2/TiO2复合光催化剂的可控制备及应用研究[J].陶瓷学报,2017,38(2):254-258.
[8] 孙怡,于利亮,黄浩斌,等.高级氧化技术处理难降解有机废水的研发趋势及实用化进展[J].化工学报,2017,68(5):1743-1756.
[9] 刘旭,张西慧.改性TiO2光催化剂催化降解双酚A的研究进展[J].工业水处理,2018,38(4):6-10.
[10] 李沙沙,刘勇,吴刚,等.金红石相Ce/TiO2复合材料的制备及其光催化性能[J].化工新型材料,2017,45(1):59-61.