WO_3-TiO_2/C@Fe_3O_4纳米复合粉体的制备及对甲基橙的太阳光催化降解

Preparation of Nanometer WO_3-TiO_2/C@Fe_3O_4 Composite Powder and Its Sunlight Photocatalytic Degradation to Methyl Orange

以纳米Fe_3O_4粉体为原料与葡萄糖溶液采用高压水热反应制备C@Fe_3O_4纳米载体,并以其为核采用溶胶-凝胶法制备了WO_3-TiO_2/C@Fe_3O_4纳米复合粉体.通过X射线衍射(XRD)、傅立叶红外光谱(FT-IR)、透射电镜(TEM)等进行了表征,并测定了其对甲基橙溶液的太阳光催化性能.结果表明,pH=5时,WO_3-TiO_2/C@Fe_3O_4纳米复合粉体对甲基橙的催化活性最高,太阳光照射6 h后降解率达到45.3%,并能实现粉体与甲基橙溶液的有效分离.

Nanometer C@Fe3O4 carrier and nanometer WO3-TiO2/C@Fe3O4 composite powders were prepared by the hydrothermal method using nanometer Fe3O4 and glucose as raw materials, the Sol-gel method using C@Fe3O4 as core, respectively. The composite powders were characterized by XRD, FT-IR, TEM and the properties of sunlight photocatalytic degradation to methyl orange solution were determined. Experimental results showed that the composite powders have higher sunlight catalytic activity. The degradation rate reaches the maximum to 45.3% under 6 hours′sunshine when the p H value of the methyl orange solution is 5. The nanometer composite powder could be separated and recycled from the methyl orange solution.