活性炭粒子电极改性及其电催化性能

针对粒子电极电催化性能低、电能消耗大等问题，以柱状活性炭（AC）为载体，采用浸渍法制备负载金属的活性炭粒子电极，通过正交试验探究其最优制备条件，并应用Bohem返滴定法和SEM对改性活性炭进行表征。正交试验表明:粒子电极电催化性能受浸渍时间的影响比受浸渍浓度、焙烧时间、焙烧温度的影响更大。不同制备条件下的粒子电极形貌差异很大。在0.1 mol/L的浸渍液中浸渍12 h，400 ℃条件下焙烧4 h得到的粒子电极用于三维电极反应器中降解活性艳红X-3B，染料去除率达到85.97%，COD去除率达到65.61%，对比AC，染料去除率提高了5.29百分点，COD去除率提高了10.12百分点，能耗降低了13%。表明Ni/AC粒子电极可提高其电催化性能，降低能耗。

MODIFICATION OF ACTIVATED CARBON PARTICLE ELECTRODE AND ITS ELECTROCATALYTIC PROPERTIES

Aiming at the problems of low electrocatalytic performance and large power consumption of particle electrodes, metal-supported activated carbon particle electrodes were prepared by impregnation with columnar activity (AC) as the carrier. The optimal preparation conditions were explored by orthogonal experiments, and Bohem Back Titration Method and SEM were applied for characterization of modified activated carbon. The orthogonal experiments showed that the electrocatalytic performance of the particle electrode was affected by the impregnation time more than by the impregnation concentration, roasting time, and roasting temperature. Morphology of particle electrodes varied greatly under different preparation condition. The particle electrode immersed in a 0.1 mol/L immersion liquid for 12 h and then calcined at 400 ℃ for 4 h, using in the three-dimensional electrode reactor, had a removal rate of 86% for reactive brilliant red X-3B;the COD removal rate reached 66%. Compared with original activated carbon, the dye removal rate increase by 5.29 percents, the COD removal rate increase by 10.12 percents, and the energy consumption decrease by 13%. Ni/AC particle electrode could improve the electrocatalytic performance of metal modified activated carbon particles and reduce energy consumption.