气体扩散电极制备及其对苯酚降解效果的研究  

Study on Preparation of Gas Diffuse Electrode and the Effect of Phenol Degradation

作　　者：矫彩山 孙艳[1] 弟智 陈星云[3] 

机构地区：[1]哈尔滨工程大学材料科学与化学工程学院,黑龙江哈尔滨150001 [2]北京市新创机电工程有限公司,北京100062 [3]中国辐射防护研究院,山西太原030006

出　　处：《环境科学与管理》2007年第9期110-114,共5页Environmental Science and Management

摘　　要：以质量比9：1的活性炭和乙炔黑制备气体扩散电极，着重研究电流密度、pH值、曝气量等因素对H202产生量的影响。结果表明：pH值在较大范围内均适用；电流密度控制在50～75mA／cm^2，曝气量确定为5L／min时，反应产生H2O2较多。另外，利用该气体扩散电极做阴极，石墨电极做阳极，以Na2SO4为电解质，研究了电解时间、电流密度、pH值、初始苯酚浓度、曝气量等因素对苯酚降解效果的影响。结果表明：在电流密度为75mA／cm^2、曝气量为5L／min、初始pH=3的条件下，当苯酚的初始浓度为80mg／L时，1h后其去除率达77％。The gas diffusion electrode was prepared with active carbon and acetylene black（9：1 by weight）. The study was emphasized on the factors of influencing H202 production such as current consistency, pH values and blowing air volume. The resuits show that H2O2 production was more when current density was between 50 mA/cm^2 and 75 mA/cm^2, blowing air volume was 5 L/rain, pH value was in big range. Furthermore, factors influencing phenol degradation, such as electrolysis time, current density, pH values, original phenol concentration and blowing air volume, were investigated in the system with cathode of the gas diffusion electrode and anode of graphite. In the presence of Na2SO4, phenol was degraded by H2O2 produced at cathode. The results show that phenol degradation rate was 77% in lh when current density was 75 mA/cm^2, blowing air volume was 5 L/rain, pH value was 3, and original phenol concentration was 80 mg/L.

关 键 词：气体扩散电极 H2O2产生量 苯酚降解 

分 类 号：X592[环境科学与工程—环境工程]