3D Gr/g-C3N4复合材料的制备及光催化还原铀试验研究

Preparation and Photocatalytic Reduction for Uranium of 3D Gr/g-C3N4

以苯为前驱物,采用原位MgO模版法制备具有高比表面积和丰富孔道结构的中空三维石墨材料(3D Gr);以尿素为分散液,尿素与3D Gr超声复合后热缩聚合成3D Gr/g-C3N4复合材料。3D Gr与g-C3N4复合,通过3D Gr的三维中空结构可以有效提高光生电荷迁移率,提高g-C3N4基光催化材料的可见光吸收范围、吸收强度、光生电子跃迁和利用率,从而实现高效光催化还原去除UO2^2+。

3D carbon material(3D Gr)was prepared using benzene as precursor by in-place MgO template method.Using urea as dispersion solution and 3D Gr as material by ultrasonic compound,the 3D Gr/g-C3N4 composite material was obtained by thermal condensation synthesis.Combining 3D Gr with g-C3N4,the three-dimensional hollow structure of 3D Gr can effectively improve the photo-generated charge mobility,and also improve the visible light absorption range,absorption intensity,photogenerated electron transition and utilization rate of g-C3N4-based photocatalytic materials.UO2^2+ can be removed by photocatalytic reduction.