蔗渣纤维基碳球负载TiO_(2)复合材料的制备表征及对四环素的去除研究

Preparation,Characterization and Tetracycline Removal of Bagasse Cellulose Carbon Spheres Supported Nano-TiO_(2) Composites

TiO_(2)固定在碳材料表面可以有效提高其可见光吸收性能。纳米二氧化钛经过沉积方法处理后会负载在碳球(Cs)表面,生成核-壳结构的Cs@TiO_(2)材料。由于两种材料之间形成界面,因此与纯TiO_(2)相比,Cs@TiO_(2)的可见光吸收增强。通过对复合材料进行SEM,EDS,FTIR和XPS表征测定成功制备了Cs@TiO_(2)复合材料。得到的Cs@TiO_(2)复合材料对TC进行光催化降解,研究了复合材料光催化降解四环素的性能包括pH、光催化剂投加量和四环素浓度因素的影响。最佳的实验运行条件为在pH=5,TC初始浓度为20 mg/L和复合材料投加量为50 mg时,光催化运行6个小时溶液中四环素降解率达到93%。

The visible light absorption properties of carbon materials can be effectively improved by immobilizing TiO_(2)on the surface of carbon materials.Immobilization of nano-TiO_(2)on the carbon spheres(Cs)was obtained by hydrothermal polymerization of bagasse cellulose,which expanded the light response region.The Cs@TiO_(2)with core-shell structure was prepared by depositing nano-TiO_(2)on the surface of C_(S).Because of the interface between the two materials,the visible light absorption of Cs@TiO_(2)was enhanced compared with the pure TiO_(2).The Cs@TiO_(2)composite was successfully prepared by SEM,EDS,XRD,FTIR,and XPS characteristics.The Cs@TiO_(2)composite was prepared for the photocatalytic degradation of TC.The photocatalytic degradation performance of the composite was studied,including the effects of pH value,photocatalyst dosage,and tetracycline concentration.The optimal operating conditions were shown as follows:pH=5,initial concentration of TC 20 mg/L,and dosage of the composite material was 50 mg.The degradation rate of tetracycline in the solution reached about 93%after 6 hours of photocatalytic operation.