以天然原料为模板剂制备SiO_2/TiO_2-WO_3介孔光催化材料

Preparation of SiO_2/TiO_2-WO_3 mesoporous photocatalytic materials using natural material as template

以细菌纤维素、银杏叶子、淀粉等天然原料为模板剂,通过简单的一步水热合成法制备SiO2/TiO2-WO3介孔光催化材料,并对其形貌、孔结构及吸附/光催化性能进行表征。结果表明,以细菌纤维素为模板所制备的SiO2/TiO2-WO3介孔光催化材料的比表面积、孔容积最高,分别为308.7 m2/g和0.92mL/g,在水中对罗丹明B具有最好的吸附/光催化降解效果;以叶子为模板的SiO2/TiO2-WO3介孔光催化材料,形成类似叶细胞的不规则的形貌,具有最快的吸附速率;以淀粉为模板的SiO2/TiO2-WO3介孔光催化材料呈现出较为规则的球状,具有较好的光催化性能。

SiO2/TiO2-WO3 mesoporous photocatalytic materials were prepared using natural material such as starch, leaves, cellulose as template by sample hydrothermal synthesis method. The morphology, porosity and adsorption/photocatalytic activity of the materials were characterized. The results showed that SiO2/TiO2-WO3 mesoporous photocatalytic materials prepared with cellulose as template exhibited the highest specific surface area and pore volume with 308.7 m2/g and 0.92 mL/g, respectively, and the highest adsorption/photocatalytic efficiency of removing the Rhodamine B from water. The SiO2/TiO2-WO3 mesoporous photocatalytic materials using leaves as template formed irregular morphology being similar to leaf cells and exhibited the fastest rate of adsorption. The SiO2/TiO2-WO3 mesoporous photocatalytic materials using starch as template formed comparatively regular sphere and exhibited better photocatalytic activity.