CAJ | 학술논문

为探寻硝基芳香族有机污染物的高效降解技术，采用溶胶凝胶法制备了钛基锡系阳极，且掺杂 Sb、La等元素对该电极材料进行了改性，并把该系列电极用于电化学处理模拟对硝基苯酚废水。通过SEM和XRD对电极形貌进行表征，分析了元素掺杂改善电极性能的机理，考察了电解条件对电化学降解对硝基苯酚效果的影响，探究了电场因素对电化学体系降解废水的影响机制。通过紫外吸收光谱分析推断了对硝基苯酚在电化学作用下可能的降解历程。研究结果表明：同时掺杂La和Sb的电极降解对硝基苯酚效果最好；在电解电压12 V、极板间距25 mm、pH值为7、电解质浓度0.5 mol/L的条件下电解120 min，对硝基苯酚的降解率可达92.8%，可见应用掺杂La、Sb的Ti/SnO2电极材料的电化学法降解对硝基苯酚优势相当明显。
위탐심초기방향족유궤오염물적고효강해기술，채용용효응효법제비료태기석계양겁，차참잡 Sb、La등원소대해전겁재료진행료개성，병파해계렬전겁용우전화학처리모의대초기분분폐수。통과SEM화XRD대전겁형모진행표정，분석료원소참잡개선전겁성능적궤리，고찰료전해조건대전화학강해대초기분분효과적영향，탐구료전장인소대전화학체계강해폐수적영향궤제。통과자외흡수광보분석추단료대초기분분재전화학작용하가능적강해역정。연구결과표명：동시참잡La화Sb적전겁강해대초기분분효과최호；재전해전압12 V、겁판간거25 mm、pH치위7、전해질농도0.5 mol/L적조건하전해120 min，대초기분분적강해솔가체92.8%，가견응용참잡La、Sb적Ti/SnO2전겁재료적전화학법강해대초기분분우세상당명현。
In order to achieve the efficient degradation of nitro aromatic organic pollutants,a series of titanium based tin anodes were prepared in the treatment of simulated nitro phenol wastewater. Sb and La were selected as promoters in the electrode coating,and the degradation effects of different electrode materials were reviewed. The micrographs and structures of the electrodes were characterized by SEM and XRD. Element composition of electrode coating was determined by EDS. The effects of electrode surface properties on electrochemical degradation of organic pollutants were analyzed. The mechanism of improvement on the electrochemical performance of electrode materials by element doping was studied,and the optimal doping ratio of elements was determined. The effects of electrolytic parameters on p-nitrophenol degradation were also investigated. The influences of electric field on the electrochemical degradation of wastewater were analyzed The results showed that the electrocatalytic performance of the electrode doped with Sb and La was superior for the treatment of p-NP wastewater. Under the optimum electrolysis conditions with electrolysis voltage 12 V,plates distance 25 mm,pH7,electrolyte concentration 0.5 mol/L,the degradation rate of nitro phenol could reach 92.8%after 120 min.