Study on the Electrochemical Oxidation of Ampicillin Using Ti/TiHx-NiCo2O4Anode

ZHANG Yuanyuan; ZHOU Chuanyi; RAO Yongfang; YAN Wei

doi:10.7652/xjtuxb202511005

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Study on the Electrochemical Oxidation of Ampicillin Using Ti/TiH_x-NiCo₂O₄Anode

Special Topic Pollution Control and Resource Utilization in the“Dual Carbon”Context | 更新时间：2025-11-11

- Study on the Electrochemical Oxidation of Ampicillin Using Ti/TiH_x-NiCo₂O₄Anode
- Journal of Xi'an Jiaotong University Vol. 59, Issue 11, Pages: 53-62(2025)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202511005
  CLC： X522
- Received：12 April 2025，
  
  Published：10 November 2025
- 稿件说明：
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ZHANG Yuanyuan, ZHOU Chuanyi, RAO Yongfang, et al. Study on the Electrochemical Oxidation of Ampicillin Using Ti/TiH_x-NiCo₂O₄Anode[J]. Journal of Xi'an Jiaotong University, 2025, 59(11): 53-62. DOI: 10.7652/xjtuxb202511005.
DOI：

ZHANG Yuanyuan, ZHOU Chuanyi, RAO Yongfang, et al. Study on the Electrochemical Oxidation of Ampicillin Using Ti/TiH_x-NiCo₂O₄Anode[J]. Journal of Xi'an Jiaotong University, 2025, 59(11): 53-62. DOI: 10.7652/xjtuxb202511005. DOI：

摘要

针对新型有机污染物氨苄西林长期累积引发的耐药性风险及环境危害问题，基于低成本、高导电性与催化活性的NiCo

材料，开发环境友好型电化学氧化新型钛阳极材料。首先，采用电沉积法制备Ti/Ti H

-NiCo

电极，通过催化活性和线性扫描伏安法、电化学阻抗谱等系统电化学表征工艺参数优化；其次，探究了反应过程中初始pH、电流密度等因素对氨苄西林降解效果的影响；最后，进行了自由基捕获实验和加速寿命测试。结果表明：Ti/Ti H

-NiCo

电极的最佳制备条件为电流密度20mA·cm

-2

、硝酸镍浓度为0.5mol·L

-1

、镀膜层数为3层；碱性（pH= 9.97）条件下，氨苄西林降解速率最快，20min内可去除97%的质量浓度为50mg·L

-1

的氨苄西林；降解时所用的最佳电流密度为10mA·cm

-2

，此条件下质量浓度50mg·L

-1

的氨苄西林可在40min内被完全去除；Ti/Ti H

-NiCo

电极氧化的反应机理是直接氧化（直接电子转移）与间接氧化（羟基自由基作用）作用并存；Ti/Ti H

-NiCo

阳极的稳定使用寿命超过90h，表面钝化和活性成分浸出是其主要的失活途径。

Abstract

To address the antibiotic resistance risks and environmental hazards caused by the longterm 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 NiCo

.Firstly

the Ti/TiH

-NiCo

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 ampicillin 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/TiH

-NiCo

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 (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/TiH

-NiCo

electrode oxidation involves both direct oxidation (direct electron transfer) and indirect oxidation (hydroxyl radical interactions).The stable service life of the Ti/TiH

-NiCo

anode exceeds 90 hours

and its main deactivation pathways are surface passivation and leaching of active components.

关键词

Keywords

references

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