Boron-doped diamond(BDD)is a well-known anode material with a high pollutant degradation ability for electrochemical oxidation wastewater treatment.Nevertheless,the cost of production and mechanical strength of BDD me...Boron-doped diamond(BDD)is a well-known anode material with a high pollutant degradation ability for electrochemical oxidation wastewater treatment.Nevertheless,the cost of production and mechanical strength of BDD membranes remain unsatisfactory.Magnetic BDD particles derived from industrial waste may represent a promising alternative to BDD membranes,although the challenge remains in assembling these particles into a usable electrode.In this study,magnetic BDD particles were attracted to a Ti/RuO_(2)-IrO_(2)electrode using a magnet,thus constituting a novel 2.5-dimensional(2.5D)electrode.To ascertain the structure-activity relationship of the novel electrode,essential characterizations,multi-physics simulations,pollutant degradation and electrosynthesis experiments were conducted.The results indicate that an appropriate quantity of BDD particles(0.1 g/cm^(2))can enhance the number of active sites by approximately 20%.A strong synergistic effect was observed between the Ti/Ti/RuO_(2)-IrO_(2)and BDD particles in the degradation of various pollutants,including azo dye,p-benzoquinone,succinic acid and four kinds of real wastewaters,as well as glycerol conversion.The joint active sites on the interface between Ti/RuO_(2)-IrO_(2)and BDD particles,as well as the inner active sites on BDD particles,have been identified as crucial in the mineralization of pollutants and the generation of value-added products.The optimal amount of BDD particles(0.1 g/cm^(2))is sufficient to preserve the joint active sites and to maintain an adequate polarization on the BDD particles.Nevertheless,the hybrid feature of the 2.5D electrode is diminished when a greater quantity of BDD particles(0.3 g/cm^(2))is loaded.展开更多
基金the National Natural Science Foundation of China(Nos.21706153,52270078)Natural Science Basic Research Program of Shaanxi Province(Nos.2018JQ2066,2022JM065)。
文摘Boron-doped diamond(BDD)is a well-known anode material with a high pollutant degradation ability for electrochemical oxidation wastewater treatment.Nevertheless,the cost of production and mechanical strength of BDD membranes remain unsatisfactory.Magnetic BDD particles derived from industrial waste may represent a promising alternative to BDD membranes,although the challenge remains in assembling these particles into a usable electrode.In this study,magnetic BDD particles were attracted to a Ti/RuO_(2)-IrO_(2)electrode using a magnet,thus constituting a novel 2.5-dimensional(2.5D)electrode.To ascertain the structure-activity relationship of the novel electrode,essential characterizations,multi-physics simulations,pollutant degradation and electrosynthesis experiments were conducted.The results indicate that an appropriate quantity of BDD particles(0.1 g/cm^(2))can enhance the number of active sites by approximately 20%.A strong synergistic effect was observed between the Ti/Ti/RuO_(2)-IrO_(2)and BDD particles in the degradation of various pollutants,including azo dye,p-benzoquinone,succinic acid and four kinds of real wastewaters,as well as glycerol conversion.The joint active sites on the interface between Ti/RuO_(2)-IrO_(2)and BDD particles,as well as the inner active sites on BDD particles,have been identified as crucial in the mineralization of pollutants and the generation of value-added products.The optimal amount of BDD particles(0.1 g/cm^(2))is sufficient to preserve the joint active sites and to maintain an adequate polarization on the BDD particles.Nevertheless,the hybrid feature of the 2.5D electrode is diminished when a greater quantity of BDD particles(0.3 g/cm^(2))is loaded.
