聚苯胺复合二氧化钛的制备及其降解硝基苯研究

Study on preparation of composite by polyaniline and titanium dioxide and its degradation of nitrobenzene

以苯胺和二氧化钛为原料,采用化学氧化法,合成光降解复合材料聚苯胺(PANI)/二氧化钛(TiO_(2)),并对其进行表征。采用该复合材料对50mg·L^(-1)的硝基苯模拟废水进行自然光催化降解研究,实验结果显示,当二氧化钛和苯胺用量摩尔数之比为10∶1,在自然光条件下获得最佳的催化效果,同时讨论了不同pH值和投加量对降解效果的影响,发现当pH=7,投加量为0.5g·L^(-1)时,2h自然光降解效率达到95.2%,反应速率常数增长了3.25倍。

Polyaniline(PANI)/titanium dioxide(TiO_(2))was synthesized by chemical oxidation from aniline and titanium dioxide,and characterized in this paper.The composite material was used to study the photocatalytic degradation of 50 mg·L^(-1) nitrobenzene simulated wastewater under natural sunlight.The experimental results showed that when the molar ratio of titanium dioxide and aniline was 10∶1,the best catalytic effect was obtained under natural sunlight.At the same time,the influences of different pH value and dosage on the degradation effect were discussed.It was found that when pH=7 and dosage was 0.5g·L^(-1),the natural photodegradation efficiency reached 95.2%in 2 hours,and the constant of the reaction rate increased by 3.25 times.