Photocatalytic Degradation of Coking Wastewater by Ce-Ti-Graphene Composite

[摘要] Photocatalytic technology has bright prospects in the field of coking wastewater treatment. UV spectrophotometer is used to test the photodegradation of 10 mol/L rhodamine B solution on the self-built photocatalytic platform. The photocatalytic properties of 7 kinds of catalysts are compared and analyzed. The results show that after the 30min simulation of sunlight, the photocatalytic effect from the best to the worst is 10%CeO2-TiO2/10% RGO >5% CeO2-TiO2/10% RGO >1% CeO2-TiO2/10% RGO >TiO2/10% RGO >10% CeO2-TiO2. In the case of the TiO2 composite with single modified materials of the same mass, the composite with graphene has better photocatalytic properties than the composite with CeO2 while the TiO2 composite with two modified materials shows better photocatalytic effect than that with only one single material, and the samples with more CeO2 have more excellent photocatalytic properties in the case of the same mass of graphene. And the photocatalytic performance of 10%CeO2-TiO2/10%RGO composites is the best, whose photocatalytic degradation is 6.71 times that of pure TiO2. The results show that the composite of graphene and CeO2 effectively improves the photocatalytic efficiency and improves the defects of TiO2 to a certain extent.

[发布机构] Chongqing Real Estate College, 400331, China^1;Chongqing University, College of Materials Science and Engineering, 400444, China^2

[效力级别] 无线电电子学

[关键词] Coking wastewater treatments;Graphene composites;Modified materials;Photo catalytic degradation;Photocatalytic effect;Photocatalytic efficiency;Photocatalytic performance;Photocatalytic property