CuO-Co3O4改性钛基纳米电极去除水中硝酸盐

X703; 依据金属有机框架(MOF)合成路径,经两次水热再煅烧的方法制备CuO-Co3O4 改性钛基纳米电极(CuO-Co3O4@TBNE).XRD和XPS表征表明,电极表面由Co3O4和Cu2+组成;SEM和EDS表征发现质量分数约7.85%的Cu元素负载在了Co3O4纳米条上;利用线性扫描伏安法测试了电极对于水中NO3--N的电催化还原能力,发现其电流响应密度较大,表现出了较强的电化学活性.将其用于电催化还原去除水中硝酸盐,结果表明,在pH=7、电流密度10 mA/cm2、NO3--N初始质量浓度50 mg/L条件下电解2 h后NO3--N去除率达到99.73%;电极可以在较大酸碱范围内...

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Published in	工业水处理 Vol. 45; no. 2; pp. 46 - 53
Main Authors	刘松麟, 杨庆峰, 邱辉强, 孙宇雯, 刘阳桥
Format	Journal Article
Language	Chinese
Published	中国科学院上海高等研究院绿色化学工程技术研究与发展中心,上海 201210 01.02.2025 中国科学院大学,北京 100049%中国科学院上海高等研究院绿色化学工程技术研究与发展中心,上海 201210%中国科学院上海硅酸盐研究所,上海 200050
Subjects	硝酸盐金属有机框架 titanium-based nanoelectrode 四氧化三钴 nitrate 电催化 electrocatalysis 钛基纳米电极 tricobalt tetraoxide metal-organic frameworks
Online Access	Get full text
ISSN	1005-829X
DOI	10.19965/j.cnki.iwt.2024-0068

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Abstract	X703; 依据金属有机框架(MOF)合成路径,经两次水热再煅烧的方法制备CuO-Co3O4 改性钛基纳米电极(CuO-Co3O4@TBNE).XRD和XPS表征表明,电极表面由Co3O4和Cu2+组成;SEM和EDS表征发现质量分数约7.85%的Cu元素负载在了Co3O4纳米条上;利用线性扫描伏安法测试了电极对于水中NO3--N的电催化还原能力,发现其电流响应密度较大,表现出了较强的电化学活性.将其用于电催化还原去除水中硝酸盐,结果表明,在pH=7、电流密度10 mA/cm2、NO3--N初始质量浓度50 mg/L条件下电解2 h后NO3--N去除率达到99.73%;电极可以在较大酸碱范围内工作,中性和酸性条件下比在碱性条件下电化学还原效果更好;此外,当添加质量浓度为1 000 mg/L的Cl-时,可以获得93.7%的总氮去除率.添加叔丁醇(TBA)的原子氢清除实验表明,该电极催化体系对NO3--N的还原基本沿直接电子还原路径进行.稳定性评价实验表明,CuO-Co3O4@TBNE电极在10次循环实验中表现出了较好的稳定性以及极低的金属浸出量.
AbstractList	X703; 依据金属有机框架(MOF)合成路径,经两次水热再煅烧的方法制备CuO-Co3O4 改性钛基纳米电极(CuO-Co3O4@TBNE).XRD和XPS表征表明,电极表面由Co3O4和Cu2+组成;SEM和EDS表征发现质量分数约7.85%的Cu元素负载在了Co3O4纳米条上;利用线性扫描伏安法测试了电极对于水中NO3--N的电催化还原能力,发现其电流响应密度较大,表现出了较强的电化学活性.将其用于电催化还原去除水中硝酸盐,结果表明,在pH=7、电流密度10 mA/cm2、NO3--N初始质量浓度50 mg/L条件下电解2 h后NO3--N去除率达到99.73%;电极可以在较大酸碱范围内工作,中性和酸性条件下比在碱性条件下电化学还原效果更好;此外,当添加质量浓度为1 000 mg/L的Cl-时,可以获得93.7%的总氮去除率.添加叔丁醇(TBA)的原子氢清除实验表明,该电极催化体系对NO3--N的还原基本沿直接电子还原路径进行.稳定性评价实验表明,CuO-Co3O4@TBNE电极在10次循环实验中表现出了较好的稳定性以及极低的金属浸出量.
Abstract_FL	In this study,a CuO-Co3O4 modified titanium-based nanoelectrode(CuO-Co3O4@TBNE)was synthesized by two hydrothermal and calcination methods based on the metal organic framework(MOF)synthesis route.XRD and XPS characterization indicated that the electrode surface was composed of Co3O4 and Cu2+.SEM and EDS character-ization revealed that Cu element with a mass fraction of approximately 7.85%was loaded onto Co3O4 nanorods.The electrocatalytic reduction ability of the electrode for NO3--N in water was tested using linear sweep voltammetry,and was found to have high current response density and exhibit strong electrochemical activity.It was used for elec-trocatalytic reduction to remove nitrate from water.The results showed that under the conditions of pH=7,current density of 10 mA/cm2,and initial mass concentration of NO3--N 50 mg/L,the removal rate of NO3--N reached 99.73%after electrolysis for 2 hours.The electrode could work in a wide range of acidity and alkalinity,and the electrochemical reduction effect was better under neutral and acidic conditions than under alkaline conditions.In addition,when adding Cl-with a mass concentration of 1 000 mg/L,the total nitrogen removal rate of 93.7%could be achieved.The hydrogen atom radical scavenging experiment using tertiary butanol(TBA)showed that the reduc-tion of NO3--N by the electrode catalytic system mainly followed the direct electron reduction pathway.The CuO-Co3O4@TBNE electrode showed good stability and extremely low metal leaching in 10 cycles.
Author	刘松麟邱辉强孙宇雯刘阳桥杨庆峰
AuthorAffiliation	中国科学院上海高等研究院绿色化学工程技术研究与发展中心,上海 201210;中国科学院大学,北京 100049%中国科学院上海高等研究院绿色化学工程技术研究与发展中心,上海 201210%中国科学院上海硅酸盐研究所,上海 200050
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Author_FL	LIU Yangqiao YANG Qingfeng QIU Huiqiang SUN Yuwen LIU Songlin
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Keywords	硝酸盐金属有机框架 titanium-based nanoelectrode 四氧化三钴 nitrate 电催化 electrocatalysis 钛基纳米电极 tricobalt tetraoxide metal-organic frameworks
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