TiO2柱撑石墨烯复合材料的制备及光催化性能

Synthesis and enhanced photocatalytic activity of TiO2 pillared graphene nanocomposites

通过水热反应合成了TiO2柱撑石墨烯复合材料,研究了TiO2纳米颗粒及TiO2柱撑石墨烯复合材料的制备以及光催化降解亚甲基蓝性能,探讨了制备过程中水热反应时间、水热反应步骤对TiO2纳米颗粒的影响,并在紫外光下考察了上述两种材料对光催化性能的影响。结果表明,利用两步水热法且反应时间为10 h时为制备复合材料的最佳条件,在紫外光的照射下,TiO2柱撑石墨烯复合材料在降解亚甲基蓝过程中显示出更高的光催化效率,这项工作开辟了一条新的制备石墨烯–半导体复合材料的途径。

TiO2 pillared graphene nanocomposites were synthesized by hydrothermal treatment in this paper, the TiO2 nanoparticles and TiO2 pillared graphene nanocomposites were prepared in different reaction times and reaction procedures, and the properties of catalytic degradation on methylene blue（MB） were studied. In the results, the optimum conditions for preparing composite materials are defined as the two-step hydrothermal method at the hydrothermal temperature of 180 ℃, the TiO2 nanoparticles exhibits good crystal structure, and the nanocomposites show a higher photocatalytic efficiency in the process of MB degradation. This work can open up new ways to obtain the photoactive graphene-semiconductor nanocomposites.