CAJ | 학술논문

采用二氧化钛光催化结合掺硼金刚石电催化来提高污染物氧化效率.以苯酚作为模型废水污染物,分别比较了采用BDD电催化和TiO2光催化以及两者结合方法的降解过程,研究了电流密度和初始浓度等条件对降解效果的影响,并进行了反应动力学讨论.实验结果表明:与单独处理相比, BDD和TiO2组合处理方法拥有较优的苯酚去除效果,尤其是先电解后光催化的方式,其最优工作电流密度为25.48 mA/cm2,并且随着苯酚初始浓度增加,去除率随之下降.动力学研究表明反应符合准一级动力学方程.
채용이양화태광최화결합참붕금강석전최화래제고오염물양화효솔.이분분작위모형폐수오염물,분별비교료채용BDD전최화화TiO2광최화이급량자결합방법적강해과정,연구료전류밀도화초시농도등조건대강해효과적영향,병진행료반응동역학토론.실험결과표명:여단독처리상비, BDD화TiO2조합처리방법옹유교우적분분거제효과,우기시선전해후광최화적방식,기최우공작전류밀도위25.48 mA/cm2,병차수착분분초시농도증가,거제솔수지하강.동역학연구표명반응부합준일급동역학방정.
Boron-doped diamond (BDD) electrocatalysis is combined with photocatalysis using titanium dioxide (TiO2) as a catalyst to improve pollutant-oxidation efficiency. Phenol solution is chosen as model wastewater. Different methods involving BDD and/or TiO2 during the degradation processes are compared. Parameters such as the currency density and initial concentration are varied in order to determine their effects on the oxidation process. Moreover, the degradation kinetics of phenol is experimentally studied. The results reveal the superiority of series combination of BDD and TiO2, especially the treatment process of electrocatalysis and succedent photocatalysis, and the optimum working currency density for electrocatalysis is 25.48 mA/cm2. The removal rate decreases with the increase in the initial phenol concentration and the degradation reaction follows quasi-first-order kinetics equation.