【摘要】 目的制备和筛选出一种高效、稳定的新型石墨烯复合负载型粒子电极.方法采用溶胶凝胶法制备了一系列不同基底的石墨烯负载型粒子电极,以苯酚为目标污染物考察粒子电极的催化活性,确定最优粒子电极,通过正交试验优化其制备条件.最后采用SEM、EDS、BET、XRD、LSV、CV手段对粒子电极的结构、表面形貌及电化学性能等进行表征.结果筛选出Ti-r GO/GAC-S(椰壳活性炭)为最优粒子电极,对苯酚去除率为85. 26%;正交试验优化其制备条件为钛酸丁酯投加量75 mL、r GO投加量0. 2 g、煅烧温度400℃、煅烧时间1 h;负载Ti和r GO后表面积、析氧电位增大,对苯酚直接氧化能力提高.结论筛选出的Ti-r GO/GAC-S粒子电极电催化活性最高,表面积大,活性点位多,对苯酚的直接氧化能力高.更多还原

【Abstract】 To prepare and screen a newtype of graphene composite supported particle electrode with high efficiency and stability. A series of graphene-loaded particle electrodes with different substrates were prepared by sol-gel method. The catalytic activity of the particle electrode was investigated with phenol as the target contaminant. The optimal particle electrode was determined and the preparation conditions were optimized by orthogonal test. Finally,SEM,EDS,BET,XRD,LSV,and CV methods were used to characterize the structure,surface morphology and electrochemical properties of the particle electrode. The results showed that Ti-rGO/GAC-S( coconic activated carbon) was selected as the best particle electrode,and the removal rate of phenol was85. 26%. Orthogonal experiments optimize the preparation conditions as follows: the dosage of butyl titanate is 75 mL,the dosage of r GO is 0. 2 g,the calcination temperature is 400 ℃,the calcination time is 1 h; surface area and oxygen evolution potential increase after loading Ti and r GO,and the direct oxidation ability of phenol is improved. The conclusion is that the selected Ti-rGO/GAC-S particle electrode has the highest electrocatalytic activity,large surface area,many active sites,and high direct oxidation ability to phenol.更多还原