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有效的酸盐去除与高N₂选择性由顿基Cu-Fe LDH复合物的活性位点丰富的颗粒电极

Ruihua Xue¹, Junchi Gu¹, Mengli Yang¹

¹School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, PR China.

Journal of environmental management

|November 6, 2024

概括

一个基于本托尼特的新型铜-铁层双氧化物 (CuFe-LDH/BT) 复合电极有效地在三维电化学系统中去除酸盐- (NO3−-N). 这种催化剂实现了100%的去除效率和高选择性,证明了对净化水的可重复使用性.

科学领域:

环境化学环境化学
材料科学材料科学材料科学
电化学电化学电化学

背景情况:

水体中酸盐- (NO3−-N) 的污染对环境和健康构成重大风险.
传统的酸盐去除方法经常面临效率和成本效益的局限性.

研究的目的:

开发和评估一种基于土酸的Cu-Fe层叠双氧化物 (LDH) 复合粒子电极 (CuFe-LDH/BT),用于高效地去除NO3−-N.
研究CuFe-LDH/BT电极在三维电化学 (3D/E) 系统中的催化活性,最佳合成条件和反应机制.

主要方法:

CuFe-LDH/BT复合粒子电极的制造.
使用XRD,SEM,BET,EIS和XPS进行表征.
在不同条件下的3D/E系统中评估NO3−-N去除效率和N2选择性.
回收测试以评估催化剂的稳定性.

主要成果:

优化的CuFe-LDH/BT电极 (Cu:Fe 摩尔比为 3:1,1g BT,pH 10,40°C) 显示出极好的催化活性.
鉴定证实了成功的LDH形成,分层结构,高表面积和良好的导电性.
在240分钟内在8mA/cm2的温度下实现了100%的NO3−-N去除效率和83.41%的N2选择性.
在3次重复使用周期后,电极保持了高活性.

结论:

使用CuFe-LDH/BT的3D/E系统在从水中去除NO3−-N方面非常有效.
开发的复合电极为酸盐污染的补救提供了一个有希望的解决方案.
对反应机制的进一步探索可以为实际应用优化该过程.

关键词:

托尼特 (Bentonite) 是一种托尼特.有层的双氧化物.N(2) 的选择性.酸盐-的关系是微粒电极是一种粒子电极.

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