TiO_2/SiO_2/rGO复合材料的制备及光催化性能探讨研究

Preparation and photocatalytic performance of TiO_2-SiO_2-rGO composite

制备了一种新型TiO_2/SiO_2/氧化还原石墨烯(TiO_2/SiO_2/rGO)三元复合材料,并对该复合材料的晶型结构、功能基团、元素化学性质、表面形貌和吸附效果进行了表征和分析,研究了其对阳离子染料[亚甲基蓝(MB)、罗丹明B(RhB)]与阴离子染料[甲基橙(MO)]的吸附降解效果,并比较了不同配比材料对MO的吸附降解作用。结果表明:TiO_2/SiO_2/rGO三元复合材料对不同染料都具有较高的光催化活性,其中对MO的光催化吸附降解效果更好。rGO∶(TiO_2/SiO_2)=1∶1(质量比)时,三元复合材料的光催化性能最佳,最大光催化吸附降解效率可达86%。

The preparation of a new type of ternary TiO2-SiO2-rGO composite was presented.The absorption and degradation activities of prepared ternary composite on the cation dye of methylene blue（MB）and rhodamine B（RhB）,as well as the anionic dyes of methyl orange（MO）were demonstrated.The photocatalytic performance of different products was also compared using MO.The results showed that the ternary composites exhibited high photocatalytic activity on different dyes,on which MO Especially.Moreover,the best photocatalytic degradation efficiency with up to 86% was achieved when the ratio of rGO∶（TiO2/SiO2） was 1∶1.