Efficient activation of peroxymonosulfate by CoCuAl-LDH nanosheets for the degradation of RhB

IF 3.2 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Journal of Solid State Chemistry Pub Date : 2025-05-08 DOI:10.1016/j.jssc.2025.125414

Haiqin Bian, Zhengyu OuYang, XuMing Zhang, Jiangying Wang

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引用次数: 0

Abstract

We prepared a series of copper-containing or non-copper-containing CoAl-Layered Double Hydroxide (LDH) by hydrothermal method, and used it to activate peroxymonosulfate (PMS) to degrade Rhodamine B (RhB). The research structure showed that the addition of copper could improve the activation efficiency of LDH and make the degradation rate of RhB faster. The effect was the best when the ratio of copper to cobalt reached 1:19. Under the combined action of 30 mg PMS and 25 mg CoCuAl-LDH, 98 % of the organic dye was effectively removed from a Rhodamine B (RhB) solution with a concentration of 100 mg/L. Electrochemical Impedance Spectroscopy (EIS) and linear sweep voltammetry (LSV) tests showed that adding copper could effectively improve the electron transfer rate of LDH, thereby improving the catalytic degradation efficiency. XPS and free radical quenching experiments also showed that cobalt ions participated in the reaction, and the generated singlet oxygen (¹O₂) as the main free radical presided over the degradation of RhB. In this study, we synthesized CoCuAl-LDH nanosheets through a facile method and demonstrated their superior electrochemical properties compared to conventional CoAl-LDH.

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CoCuAl-LDH纳米片高效活化过氧单硫酸盐降解RhB

采用水热法制备了一系列含铜或不含铜的煤层双氢氧化物（LDH），并利用其活化过氧单硫酸盐（PMS）降解罗丹明B （RhB）。研究结果表明，铜的加入可以提高LDH的活化效率，加快RhB的降解速度。当铜钴比达到1:19时，效果最好。在30 mg PMS和25 mg CoCuAl-LDH的联合作用下，从浓度为100 mg/L的Rhodamine B （RhB）溶液中有效去除98%的有机染料。电化学阻抗谱（EIS）和线性扫描伏安法（LSV）测试表明，添加铜可以有效提高LDH的电子传递速率，从而提高催化降解效率。XPS和自由基猝灭实验也表明钴离子参与了反应，生成的单线态氧（1O2）作为主要自由基主持了RhB的降解。在这项研究中，我们通过一种简单的方法合成了CoCuAl-LDH纳米片，并证明了它们与传统的煤- ldh相比具有优越的电化学性能。

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来源期刊

Journal of Solid State Chemistry 化学-无机化学与核化学

CiteScore

6.00

自引率

9.10%

发文量

848

审稿时长

25 days

期刊介绍： Covering major developments in the field of solid state chemistry and related areas such as ceramics and amorphous materials, the Journal of Solid State Chemistry features studies of chemical, structural, thermodynamic, electronic, magnetic, and optical properties and processes in solids.