石墨烯-铁酸铜活化过一硫酸盐降解酸性红B

Degradation of Acid Red B with peroxymonosulfate activated by CuFe2O4/graphene oxide

采用溶胶-凝胶法制备了CuFe2O4-GO活化剂,并研究了其活化过一硫酸盐(PMS)降解酸性红B(ARB)的效果。结果表明,当CuFe2O4-GO投加量为0.1 g/L,n(PMS)∶n(ARB)=10∶1,pH=7.0时,反应10 min后ARB降解率可达96%;Cl-对ARB降解无显著影响。自由基猝灭实验表明,反应体系中非自由基(1O2)发挥了主要作用;紫外可见光谱分析结果表明,降解后ARB分子中的萘环和偶氮键结构均被破坏;TOC分析表明,反应体系对ARB染料具有一定的矿化率。CuFe2O4-GO在循环使用5次后仍有较好的活化效果。

The CuFe2O4-GO was synthesized by sol-gel method.The Acid Red B(ARB)was degraded by the activa-tion of peroxymonosulfate with CuFe2O4-GO.The results showed that the ARB removal rate reached 96%after 10 min reaction with 0.1 g/L CuFe2O4-GO dosage,10∶1 of PMS and ARB molar ratio and pH 7.0.The concentration of Cl-had no significant effect on the degradation of ARB.Free radical identification experiments showed that non-radical path-way(1O2)played a primary role during the whole process.From UV-vis spectra results,the naphthalene ring and azo band of ARB were found to be destroyed.The TOC analysis indicated that the CuFe2O4-GO/PMS system could obtain a certain degree of ARB mineralization.After five rounds of test,the CuFe2O4-GO still had an excellent performance for the activation of PMS.