碳基改性TiO_(2)去除水中典型污染物的试验

Experiment on Modified Carbon-Doped TiO_(2)for Typical Pollutants Removal in Aqueous Solution

文章采用溶胶-凝胶法制备了一种碳基改性的Biochar/TiO_(2)复合材料,用于水中多种污染物的有效去除。试验以水体中的代表性污染物(腐植酸、氨氮)、抗病毒药物(盐酸阿比多尔、磷酸氯喹)以及染料废水(亚甲基蓝、活性红)为考察对象,研究了新材料对其光催化降解作用,并通过扫描电子显微镜(SEM-EDS)、比表面积测试(BET)、粒径分析及X射线衍射(XRD)对该材料进行表征分析。结果表明,经氙灯(AM1.525A)照射60 min后,Biochar/TiO_(2)复合材料对不同类型的污染物均有良好的光催化降解效果。分析测试结果显示,Biochar/TiO_(2)复合材料具有发达的多孔结构和较大的比表面积,有效负载了C、Si、Zn、S等元素,同时呈现出典型的锐钛矿晶型,有效促进了污染物的降解效率,并实现了吸附和光催化性能的同步高效联用。

A new composed material based on carbon-doped Biochar/TiO_(2)was synthesized by sol-gel method in this paper,and effectively used to remove various typical pollutants in aqueous solutions.Representative water contaminants(humic acid,ammonia nitrogen),antivirus agents(abidol hydrochloride,chloroquine phosphate)and dyeing wastewater(methylene blue,reactive red)were used to evaluate the photocatalytic degradation effect of this composite.Biochar/TiO_(2)was characterized by SEM-EDS,BET,particle size distribution and XRD to study its performance.Results showed that Biochar/TiO_(2)played an important photocatalytic role on those water pollutants.After 60 minutes irradiation under a xenon lamp(AM1.525A),an efficient degradation on all chosen water pollutants by Biochar/TiO_(2)was achieved.Textual analysis showed that Biochar/TiO_(2)had a developed porous structure and high specific surface area with effective loading of C,Si,Zn and S.Biochar/TiO_(2)also showed typical anatase-TiO_(2)peaks through XRD analysis,effectively promoted the degradation efficiency of pollutants.Thus it was favorable to simultaneous adsorption and photocatalysis on water pollutant removal.