Construction of a Ternary ZnO/CuO@UiO-66-NH2 Heterojunction for Efficient Piezo-Electric Degradation of Rhodamine B

IF 3.7 3区化学 Q2 CHEMISTRY, APPLIED

Topics in Catalysis Pub Date : 2025-12-12 DOI:10.1007/s11244-025-02252-3

Yueyue Guan, Xianglong Zeng, Shuming Liu, Kai Yao, Zhenhui Hu, Longhao Xiao, Zheng Fang, Yongsheng Yang, Hongjun Liu

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Abstract

To address the issue of limited degradation efficiency due to rapid carrier recombination in piezoelectric catalysis, this study designed a ternary heterojunction structure of ZnO/CuO@UiO-66-NH₂. A ZnO/CuO heterointerface was constructed on the surface of UiO-66-NH₂ via a hydrothermal method, forming a composite piezoelectric catalytic system with abundant active sites and enhanced built-in electric fields. Theoretical analysis indicated that UiO-66-NH₂, as a carrier, not only significantly increased the specific surface area of the material but also cooperatively regulated the charge distribution in the heterojunction region. Under ultrasonic vibration, the piezoelectric potential generated by the ZnO/CuO heterojunction effectively drove carrier separation, thereby significantly enhancing the redox reaction efficiency. Under dark conditions, the 30-minute degradation rate of RhB by this material reached 99.7%, with a rate constant of 0.09435 min⁻¹, far superior to the pure ZnO/CuO system. Additionally, ZnO/CuO@UiO-66-NH₂ demonstrated excellent catalytic performance and cycling stability in the degradation of methyl orange and methylene blue. Band structure and radical trapping experiments confirmed that hydrogen radicals (·H) and superoxide radicals (·O₂⁻) were the main active species in the degradation process. This research provides new material ideas for the development of efficient and stable heterojunction piezoelectric catalysts and offers potential pathways for the construction of integrated systems for dye wastewater treatment and energy conversion.

Graphical Abstract

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用于罗丹明B高效压电降解的三元ZnO/CuO@UiO-66-NH2异质结的构建

为了解决压电催化中载流子快速重组导致降解效率有限的问题，本研究设计了ZnO/CuO@UiO-66-NH2三元异质结结构。通过水热法在UiO-66-NH2表面构建ZnO/CuO异质界面，形成活性位点丰富、内置电场增强的复合压电催化体系。理论分析表明，UiO-66-NH2作为载流子，不仅显著提高了材料的比表面积，而且协同调节了异质结区域的电荷分布。超声波振动下，ZnO/CuO异质结产生的压电电位有效地驱动载流子分离，从而显著提高氧化还原反应效率。在暗条件下，该材料对RhB的30分钟降解率达到99.7%，速率常数为0.09435 min⁻¹，远远优于纯ZnO/CuO体系。此外，ZnO/CuO@UiO-66-NH2在降解甲基橙和亚甲基蓝中表现出优异的催化性能和循环稳定性。带结构和自由基捕获实验证实，氢自由基（·H）和超氧自由基（·O2）是降解过程中的主要活性物质。本研究为开发高效、稳定的异质结压电催化剂提供了新的材料思路，为构建染料废水处理与能量转化一体化系统提供了潜在途径。图形抽象

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来源期刊

Topics in Catalysis 化学-物理化学

CiteScore

5.70

自引率

5.60%

发文量

197

审稿时长

2 months

期刊介绍： Topics in Catalysis publishes topical collections in all fields of catalysis which are composed only of invited articles from leading authors. The journal documents today’s emerging and critical trends in all branches of catalysis. Each themed issue is organized by renowned Guest Editors in collaboration with the Editors-in-Chief. Proposals for new topics are welcome and should be submitted directly to the Editors-in-Chief. The publication of individual uninvited original research articles can be sent to our sister journal Catalysis Letters. This journal aims for rapid publication of high-impact original research articles in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis.