Core-shell Structured Nano CuO@CER Composites for the Photoelectrocatalytic Degradation of Methylene Blue

IF 1.9 4区 化学 Q3 CHEMISTRY, MULTIDISCIPLINARY ChemistrySelect Pub Date : 2024-11-18 DOI:10.1002/slct.202403754
Guanyu Liang, Prof. Ying Wang, Xinyu Dong, Prof. Fen Xu
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Abstract

The composite material of nano CuO loaded on ion exchange resin (CuO@CER) as the carrier was prepared successfully by constant temperature oscillation and hydrothermal synthesis methods. It was applied to the photoelectrocatalytic degradation of methylene blue (MB) as an organic pollutant, and further to explore the optimal conditions for CuO@CER photoelectrocatalytic degradation of MB. The results showed that the composite material had a typical core-shell structure, and the nano CuO loaded on the ion exchange resin had good crystallinity and high purity. CuO@CER exhibited excellent photocatalytic and photoelectrocatalytic performance towards MB, with degradation rates of 92.02% and 95.20% in 70 min under their respective optimal reaction conditions. Furthermore, the photoelectrocatalytic stability of CuO@CER was good relatively, and the degradation rates of MB exceeded 96% after 5 cycles of photoelectrocatalytic experiments. Free radical quenching experiments indicated that superoxide radicals were the main active groups during the photoelectrocatalysis. Additionally, the mechanism of photocatalytic degradation for MB under the electric field was briefly analyzed. This study will provide technical support for the photoelectrocatalytic degradation of organic dye wastewater.

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用于光电催化降解亚甲基蓝的核壳结构纳米 CuO@CER 复合材料
采用恒温振荡法和水热合成法成功制备了以离子交换树脂为载体的纳米氧化铜(CuO@CER)复合材料。将其应用于有机污染物亚甲基蓝(MB)的光电催化降解,并进一步探讨了CuO@CER光电催化降解MB的最佳条件。结果表明,该复合材料具有典型的核壳结构,离子交换树脂上负载的纳米 CuO 结晶度好、纯度高。CuO@CER 对甲基溴具有优异的光催化和光电催化性能,在各自的最佳反应条件下,70 分钟内的降解率分别为 92.02% 和 95.20%。此外,CuO@CER 的光电催化稳定性相对较好,经过 5 个周期的光电催化实验后,甲基溴的降解率超过 96%。自由基淬灭实验表明,超氧自由基是光电催化过程中的主要活性基团。此外,还简要分析了甲基溴在电场作用下的光催化降解机理。该研究将为有机染料废水的光电催化降解提供技术支持。
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来源期刊
ChemistrySelect
ChemistrySelect Chemistry-General Chemistry
CiteScore
3.30
自引率
4.80%
发文量
1809
审稿时长
1.6 months
期刊介绍: ChemistrySelect is the latest journal from ChemPubSoc Europe and Wiley-VCH. It offers researchers a quality society-owned journal in which to publish their work in all areas of chemistry. Manuscripts are evaluated by active researchers to ensure they add meaningfully to the scientific literature, and those accepted are processed quickly to ensure rapid online publication.
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