Ti/TiHx-NiCO2O4 阳极电化学氧化氨苄西林的研究
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关键词：电化学氧化；氨苄西林； Ti/TiHx-NiCo2O4 电极；工艺参数优化；反应机理中图分类号：X522文献标志码：ADOI：10.7652/xjtuxb202511005 文章编号：0253-987X（2025）11-0053-10
Abstract： To address the antibiotic resistance risks and environmental hazards caused by the long term accumulation of the new organic pollutant ampicillin，an environmentally friendly electrochemical oxidation titanium anode material is developed based on the low cost， high conductivity，and catalytic activity of NiCo2O4 .Firstly，the Ti/TiHx-NiCo2O4 electrode is prepared via electrodeposition，and its fabrication parameters are optimized through systematic electrochemical characterizations， including catalytic activity， linear sweep voltammetry，and electrochemical impedance spectroscopy. Secondly，the effects of factors such as initial pH and current density on the degradation efficiency of ampicilin during the reaction are investigated. Finally，radical scavenging experiments and accelerated lifespan tests are conducted. The results show that the optimal preparation conditions for the Ti/TiHx-NiCo2O4 electrode include a current density of 20mA⋅cm-2 ，a nickel nitrate concentration of 0.5mol⋅L-1 ，and three coating layers. Under alkaline conditions （ Φ⋅pH=9.97 ）， the ampicillin degradation rate is the fastest，achieving 97% removal of 50mg⋅L-1 ampicillin within 20min . The optimal current density during degradation is found to be 10mA⋅cm-2 under which a 50mg⋅L-1 concentration of ampicillin can be completely removed in 40min . The reaction mechanism of the Ti/TiHx-NiCo2O4 electrode oxidation involves both direct oxidation （direct electron transfer） and indirect oxidation （hydroxyl radical interactions）. The stable service life of the Ti/TiHx-NiCo2O4 anode exceeds 9O hours，and its main deactivation pathways are surface passivation and leaching of active components.
Keywords： electrochemical oxidation;ampicillin；‘ Γi/TiHx-NiCo2O4 electrode; optimization of preparation conditions;reaction mechanism
近几十年来，水环境中频繁检测到具有健康风险的难降解新型环境污染物[1-4]。（剩余15639字）
