生源性Cu/GO复合材料阳极激活PMS降解活性黑5

Application of biogenic Cu/GO composite material in anodic activation of peroxymonosulfate degradation of Reactive Black 5

利用S.oneidensis MR-1(MR-1)菌的胞外还原作用,制备铜/氧化石墨烯复合材料(MR1-Cu-GO)作为电催化(EC)及过一硫酸盐(PMS)协同催化剂.表征结果显示,所得MR1-Cu-GO具有良好的小尺寸Cu物种分布(粒径约为5~10nm),且Cu物种以CuCl_(2)、CuO和Cu_(2)(OH)_(2)CO_(3)混合态为主.活性黑5(RBK5,10mg/L)降解效率测试显示,MR1-Cu-GO/PMS,MR1-Cu-GO/EC,MR1-Cu-GO/EC/PMS体系对RBK5均有良好的降解效率.其中MR1-Cu-GO/EC/PMS体系降解效率最高,在外加电流为50A/m^(2),PMS初始浓度为3mmol/L的最佳条件下,借助HO·和SO_(4)^(·-)等活性物质的产生,在30min内可以达到100%的RBK5降解率.

This study innovatively employed the extracellular reduction activity of S.oneidensis MR-1(MR-1)bacteria to prepare a Cu/graphene oxide composite material(MR1-Cu-GO)as an electrocatalyst(EC)and persulfate(PMS)synergistic catalyst.Characterization results indicated that the obtained MR1-Cu-GO exhibited a well-defined distribution of small-sized Cu species(with a diameter of approximately 5~10nm),with the predominant forms of Cu species being a mixture of CuCl_(2),CuO,and Cu_(2)(OH)_(2)CO_(3).Efficiency tests for RBK5 degradation reveal that the MR1-Cu-GO/PMS,MR1-Cu-GO/EC,and MR1-Cu-GO/EC/PMS systems all exhibit excellent degradation efficiency towards RBK5.Among them,the MR1-Cu-GO/EC/PMS system shows the highest degradation efficiency.Under optimal conditions with an applied current of 50A/m^(2) and an initial PMS concentration of 3mmol/L,utilizing the generation of active substances such as HO·and SO_(4)^(·-),the system achieves a 100%RBK5 degradation rate within 30 minutes.