Schottky Heterojunction of Core–Shell Cu/CuO/Cu2O for Efficient Photocatalytic Degradation

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters Pub Date : 2025-05-05 DOI:10.1007/s10562-025-05038-0

Ke Yang, Bo Zhou, Kun Dong, Yan Wu, Qu Huang, Jingbo Lv, Ziyi Wan, Mingzhu Yang

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Abstract

With the acceleration of industrialization and urbanization, the treatment of organic pollutants in water bodies has become a global problem. Photocatalytic technology is regarded as an ideal solution due to its green and efficient characteristics. However, traditional powder catalysts have the problem of difficult recovery. Using copper foam as the substrate to load photocatalysts is a feasible solution. Cu/CuO/Cu₂O with a core–shell structure was prepared by a simple solvothermal method based on copper foam. Under visible light irradiation, the Cu/CuO/Cu₂O catalyst has a high catalytic efficiency for Congo red (95% within 180 min) and a significant adsorption and degradation ability for tetracycline hydrochloride. The results of the density functional theory calculation and electrochemical tests reveal that a Schottky heterojunction forms between Cu₂O and CuO, the band gap of Cu₂O is 0.57 eV, and the free energy of Cu/CuO/Cu₂O is 0.24 eV, close to 0 eV, revealing the ternary composite’s possibility to evolve hydrogen. The heterojunction generated by Cu₂O and CuO improves the material’s charge transport efficiency. Furthermore, this ternary composite based on copper foam easy to recycle and reuse, and can maintain nearly 90% degradation efficiency after 8 cycles. This concept offers a method for planning and building interfaces in nanocomposite structures.

Graphical Abstract

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核壳型Cu/CuO/Cu2O的Schottky异质结高效光催化降解

随着工业化和城市化进程的加快，水体中有机污染物的治理已成为一个全球性的难题。光催化技术以其绿色高效的特点被认为是一种理想的解决方案。然而，传统的粉末催化剂存在回收困难的问题。用泡沫铜作为衬底负载光催化剂是一种可行的解决方案。以泡沫铜为原料，采用简单的溶剂热法制备了具有核壳结构的Cu/CuO/Cu2O。在可见光照射下，Cu/CuO/Cu2O催化剂对刚果红具有较高的催化效率（180 min内达到95%），对盐酸四环素具有显著的吸附和降解能力。密度泛函理论计算和电化学测试结果表明，Cu2O与CuO之间形成了Schottky异质结，Cu2O的带隙为0.57 eV， Cu/CuO/Cu2O的自由能为0.24 eV，接近于0 eV，表明该三元复合材料具有析氢的可能性。Cu2O和CuO形成的异质结提高了材料的电荷输运效率。此外，这种基于泡沫铜的三元复合材料易于回收再利用，经过8次循环后仍能保持近90%的降解效率。这一概念为规划和构建纳米复合材料结构中的界面提供了一种方法。图形抽象

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.