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首页> 外文期刊>Colloids and Surfaces, A. Physicochemical and Engineering Aspects >Electrocatalytic dechlorination of 2,4-dichlorophenol in aqueous solution on palladium loaded meshed titanium electrode modified with polymeric pyrrole and surfactant
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Electrocatalytic dechlorination of 2,4-dichlorophenol in aqueous solution on palladium loaded meshed titanium electrode modified with polymeric pyrrole and surfactant

机译：高分子吡咯和表面活性剂修饰的钯负载网状钛电极上水溶液中2,4-二氯苯酚的电催化脱氯

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摘要

The electrochemically reductive dechlorination of 2,4-dichlorophenol (2,4-DCP) in aqueous solution on palladium/polymeric pyrrole-sodium dodecyl sulfonate film/meshed titanium electrode (Pd/PPy-SLS/Ti electrode) was investigated in this paper. The Pd/PPy-SLS/Ti electrode was prepared by electrodesposition and characterized in terms of surface morphology (SEM), structural feature (XRD), specific surface area (BET) and Pd loading level (ICP-AES). Effects of the dechlorination current and the initial pH value of the solution on the removal efficiency and the current efficiency were studied in the 2,4-DCP dechlorination process on Pd/PPy-SLS/Ti electrode. Effective removal of 2,4-DCP was achieved with removal efficiency of 100% and current efficiency of 33.9% in the presence of 100mgL ~(-1) 2,4-DCP under the conditions of initial pH of 2.36, dechlorination current of 5mA and dechlorination time of 70min. The intermediate products were 2-chlorophenol (2-CP) and 4-chlorophenol (4-CP). The final products were mainly phenol. Its further reduction product cyclohexanone was also detected. The stability of the electrode was good that the dechlorination efficiency was maintained at 100% after having been reused 8 times. The stable electrode demonstrated a promising application prospect in dechlorination process with high effectiveness and low cost.
机译：本文研究了钯/聚合物吡咯-十二烷基磺酸钠膜/网状钛电极（Pd / PPy-SLS / Ti电极）上水溶液中2,4-二氯苯酚（2,4-DCP）的电化学还原脱氯。通过电沉积制备Pd / PPy-SLS / Ti电极，并根据表面形态（SEM），结构特征（XRD），比表面积（BET）和Pd负载量（ICP-AES）进行表征。在Pd / PPy-SLS / Ti电极上的2,4-DCP脱氯过程中，研究了脱氯电流和溶液初始pH值对去除效率和电流效率的影响。在初始pH为2.36，脱氯电流为5mA的条件下，在100mgL〜（-1）2,4-DCP的存在下，去除效率为100％，电流效率为33.9％，实现了2,4-DCP的有效去除。脱氯时间为70min。中间产物是2-氯苯酚（2-CP）和4-氯苯酚（4-CP）。最终产物主要是苯酚。还检测到其进一步的还原产物环己酮。电极的稳定性良好，在重复使用8次后，脱氯效率保持在100％。稳定的电极具有高效，低成本的特点，在脱氯过程中具有广阔的应用前景。

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