作者简介:张媛媛(1996—),女,博士生;
饶永芳(通信作者),女,副教授。
收稿:2025-04-12,
纸质出版:2025-11-10
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张媛媛, 周川乂, 饶永芳, 等. Ti/TiHx-NiCo2O4阳极电化学氧化氨苄西林的研究[J]. 西安交通大学学报, 2025,59(11):53-62. DOI: 10.7652/xjtuxb202511005.
ZHANG Yuanyuan, ZHOU Chuanyi, RAO Yongfang, et al. Study on the Electrochemical Oxidation of Ampicillin Using Ti/TiHx-NiCo2O4Anode[J]. Journal of Xi'an Jiaotong University, 2025, 59(11): 53-62. DOI: 10.7652/xjtuxb202511005.
张媛媛, 周川乂, 饶永芳, 等. Ti/TiHx-NiCo2O4阳极电化学氧化氨苄西林的研究[J]. 西安交通大学学报, 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/TiHx-NiCo2O4Anode[J]. Journal of Xi'an Jiaotong University, 2025, 59(11): 53-62. DOI: 10.7652/xjtuxb202511005. DOI:
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
2
O
4
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
x
-NiCo
2
O
4
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
x
-NiCo
2
O
4
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
x
-NiCo
2
O
4
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
x
-NiCo
2
O
4
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。
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
2
O
4
.Firstly
the Ti/TiH
x
-NiCo
2
O
4
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
x
-NiCo
2
O
4
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
x
-NiCo
2
O
4
electrode oxidation involves both direct oxidation (direct electron transfer) and indirect oxidation (hydroxyl radical interactions).The stable service life of the Ti/TiH
x
-NiCo
2
O
4
anode exceeds 90 hours
and its main deactivation pathways are surface passivation and leaching of active components.
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