石墨烯负载金属酞菁的制备及其在降解染料废水中的应用

Metal polyphthalocyanine enhanced catalytic activity of oxide graphene for degradation of dyes in wastewater

通过原位水热技术将双核金属酞菁负载在磺酸化的石墨烯材料上,得到复合光催化剂Co2Pc2/Pss-Gr。采用UV-Vis光谱、FTIR光谱、SEM电镜、XRD和XPS等进行表征。以甲基橙、罗丹明B为目标染料降解物,H2O2为氧化剂评价了Co2Pc2/Pss-Gr催化剂的光催化活性。结果表明,Co2Pc2/Pss-Gr在催化降解染料时具有选择性,能优先降解罗丹明B,可见光照射2 h后,罗丹明B降解率达到93%;π-π堆积作用有利于光生电子分离和转移,有效提高了石墨烯催化降解化工废水中染料的效率,为化工染料废水的处理技术提供了新的思路。

Metal polyphthalocyanine complexes Co2Pc2 were loaded on the surface of oxide graphene(Pss-Gr)by hydrothermal method and were characterized by UV-Vis,FTIR,SEM,XRD and XPS spectra.A catalytic system of Co2Pc2/Pss-Gr and H2O2 has high selectivity and activity for RHB and MO in wastewater.Theπ-πinteractions are beneficial to the transfer of the photogenerated electrons to further enhance the catalytic activity of the Co2Pc2 complexes.The results showed that the highest conversion rate could reach above 93%after 2 h of degradation at room temperature.The Co2Pc2/Pss-Gr materials offer great potential as active photocatalysts for degradation of dyes in wastewater.