用于有机物降解的电化学阳极材料

电化学氧化法可将难降解的有机物转化为可生化降解物质或直接矿化,具有操作简便,清洁能源,无二次污染等优点。本文介绍了电催化氧化机理最新进展,包括近年来所报道的各种电极材料直接或间接电氧化降解有机物的机制;回顾了近年来阳极材料的研究现状,以碳电极、金属电极和钛基形稳电极为主,包括各种新型电极的组成、降解性能及其钝化原因等,并对今后电氧化阳极材料及相关工艺的研究方向提出建议。

Electrochemical Anodic Materials Used for Degradation of Organic Pollutants

In recent years,researchers plunged to find efficient solutions to remove contaminants in water.Electrochemical oxidation methods were studied extensively because of the simple,clean energy and no secondary pollution.The refractory organic pollutants can be converted to biodegradable substances or direct mineralization by electrochemical oxidation method.The present review summarized the progress on electro-chemical oxidation mechanism,the recent development of anode materials,and proposed the research trend in the future.In electro-chemical oxidation mechanism aspect,the direct and indirect approaches are discussed.Some parameters which could impact the direct and indirect processes were considered.Apart from parameters,the dependence of anodic materials on the direct and indirect processes was also discussed.With the progress of anodic materials,carbon electrode,elemental metal electrode and dimensionally stable anode were summarized.All of the anodes were made to prolong the lifespan and improve the catalysis activity by adding the interlayer and adulterating the active components.The removal rates were collected to compare these anodes.For some typical anodes,the life span,the contact angle,the oxygen evolution potential(OEP) and the impedance were also listed.At last,the research trend was proposed.To achieve the commercial application of electrochemical oxidation method,the problems of the cost,the passivation membrane on the anode,and current density should be resolved.