提高z型CeO2/CuMn2O4纳米复合材料的光催化活性

IF 4.2 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Materials Science in Semiconductor Processing Pub Date : 2025-04-21 DOI:10.1016/j.mssp.2025.109595

Tingting Han , Yan Guo , Jianyu Xing , Yuefa Jia

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引用次数: 0

摘要

具有窄带隙的尖晶石CuMn2O4在光催化领域备受关注；然而，严重的光生载流子复合限制了其催化性能。本文采用水热法合成了不同质量比的CeO2/CuMn2O4纳米复合材料。值得注意的是，40% CeO2/CuMn2O4纳米复合材料表现出最佳的光催化活性，在可见光照射下对盐酸四环素（TCH）溶液的降解效率高达95.71%，是未修饰的CuMn2O4的1.8倍。Z-scheme CeO2/CuMn2O4纳米复合材料的形成主要通过促进光诱导载流子的转移来增强TCH降解活性。捕集实验证明，·O2−是CeO2/CuMn2O4光催化体系的主要反应物质。此外，CeO2/CuMn2O4纳米复合材料对CO2还原也表现出优异的光催化活性，在40%以上的CeO2/CuMn2O4纳米复合材料的CO析出率比纯CuMn2O4提高了2.6倍。该研究为提高CuMn2O4的光催化活性以应用于废水净化和CO2转化提供了良好的动力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Boosting photocatalytic activity of Z-scheme CeO2/CuMn2O4 nanocomposites

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Boosting photocatalytic activity of Z-scheme CeO2/CuMn2O4 nanocomposites

Spinel CuMn₂O₄ with a narrow band gap has captivated much attention in the field of photocatalysis; however, the severe photogenerated charge carrier recombination has limited its catalytic performance. Herein, CeO₂/CuMn₂O₄ nanocomposites with different mass ratios of CeO₂ were synthesized by hydrothermal approach. Remarkably, 40 %CeO₂/CuMn₂O₄ nanocomposites exhibited the optimal photocatalytic activity with the degradation efficiency of tetracycline hydrochloride (TCH) solution up to 95.71 % under visible light illumination, which is 1.8 times than that of undecorated CuMn₂O₄. The formation of Z-scheme CeO₂/CuMn₂O₄ nanocomposites essentially contribute to the enhanced TCH degradation activity via promoting the transfer of photoinduced charge carrier. The trapping experiments proved that·O₂⁻ is the major reactive species for the CeO₂/CuMn₂O₄ photocatalytic system. In addition, CeO₂/CuMn₂O₄ nanocomposites also presented excellent photocatalytic activity toward CO₂ reduction, while the CO evolution rate over 40 %CeO₂/CuMn₂O₄ nanocomposites was 2.6-fold enhancements compared with pure CuMn₂O₄. This study offers a promising motivation for ameliorating the photocatalytic activity of CuMn₂O₄ to apply in wastewater purification and CO₂ conversion.

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来源期刊

Materials Science in Semiconductor Processing 工程技术-材料科学：综合

CiteScore

8.00

自引率

4.90%

发文量

780

审稿时长

42 days

期刊介绍： Materials Science in Semiconductor Processing provides a unique forum for the discussion of novel processing, applications and theoretical studies of functional materials and devices for (opto)electronics, sensors, detectors, biotechnology and green energy. Each issue will aim to provide a snapshot of current insights, new achievements, breakthroughs and future trends in such diverse fields as microelectronics, energy conversion and storage, communications, biotechnology, (photo)catalysis, nano- and thin-film technology, hybrid and composite materials, chemical processing, vapor-phase deposition, device fabrication, and modelling, which are the backbone of advanced semiconductor processing and applications. Coverage will include: advanced lithography for submicron devices; etching and related topics; ion implantation; damage evolution and related issues; plasma and thermal CVD; rapid thermal processing; advanced metallization and interconnect schemes; thin dielectric layers, oxidation; sol-gel processing; chemical bath and (electro)chemical deposition; compound semiconductor processing; new non-oxide materials and their applications; (macro)molecular and hybrid materials; molecular dynamics, ab-initio methods, Monte Carlo, etc.; new materials and processes for discrete and integrated circuits; magnetic materials and spintronics; heterostructures and quantum devices; engineering of the electrical and optical properties of semiconductors; crystal growth mechanisms; reliability, defect density, intrinsic impurities and defects.