CAJ | 학술논문

铁-三乙醇胺(Fe-TEA)可作为媒质用于间接电化学法还原靛蓝.本工作采用循环伏安法研究了靛蓝在Fe-TEA媒质中的电化学行为,比较了石墨、银、镍、不锈钢四种阴极材料的电催化性能,探讨了靛蓝间接电还原的机理.此外,还进行了一组L_9(3~4)正交电解实验,通过正交实验分析了各因素对电流效率的影响.实验结果表明:在Fe(Ⅲ)-TEA媒质中,以不锈钢网为阴极可实现靛蓝的间接电化学还原,最高电流效率可达44.7%.在实验所设计因素水平范围内,对电流效率影响最大的因素为Fe(Ⅲ)-TEA媒质浓度.在靛蓝的间接电还原过程中存在一种靛蓝自由基,该自由基能起到靛蓝电还原的媒质作用,在一定实验条件下,该靛蓝自由基的媒质作用可以大于Fe(Ⅲ)-TEA.
철-삼을순알(Fe-TEA)가작위매질용우간접전화학법환원전람.본공작채용순배복안법연구료전람재Fe-TEA매질중적전화학행위,비교료석묵、은、얼、불수강사충음겁재료적전최화성능,탐토료전람간접전환원적궤리.차외,환진행료일조L_9(3~4)정교전해실험,통과정교실험분석료각인소대전류효솔적영향.실험결과표명:재Fe(Ⅲ)-TEA매질중,이불수강망위음겁가실현전람적간접전화학환원,최고전류효솔가체44.7%.재실험소설계인소수평범위내,대전류효솔영향최대적인소위Fe(Ⅲ)-TEA매질농도.재전람적간접전환원과정중존재일충전람자유기,해자유기능기도전람전환원적매질작용,재일정실험조건하,해전람자유기적매질작용가이대우Fe(Ⅲ)-TEA.
Fe-triethonolamine (Fe-TEA) complexes as mediator are well suitable for the indirect reduction of indigo. In our work, the reduction of indigo was investigated in a Fe-TEA system by cyclic voltammetry (CV). The electrocatalytic performance of four kinds of cathode materials (graphite, silver, nickel, and stainless steel) for the reduction of Fe(III)-TEA was compared. Further experiments were carried out to compare the effects of operating parameters including temperature, current, concentrations of NaOH and Fe(III)-TEA. Experimental results showed that this new route was feasible for the production of water-soluble indigo. A high current efficiency (44.7%) was achieved using optimized conditions and the concentration of the Fe(III)-TEA mediator was found to be the main influence. A new indigo radical mediator was formed during electrolysis and under certain condition, the effect of this indigo radical on the current efficiency was larger than that of Fe(HI)-TEA.