Au@Fe2O3 nanoflowers as highly sensitive SERS substrates to detect organic pollutants in water

IF 3.9 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B Pub Date : 2025-05-09 DOI:10.1016/j.mseb.2025.118396

Yunsheng Shang , Xue Zhang , Xuemei Wang , Jin Yang , Xinxin Shi , Lu-Lu Qu , Yingqiu Gu

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引用次数: 0

Abstract

Noble metal aggregates have received increasing interest in environmental monitoring and biological analysis as SERS substrates due to their high sensitivity. Depositing nanoparticles onto oxide support presents an effective approach for assembling noble metals. In this study, Au@Fe₂O₃ composite substrates were utilized for SERS detection. Low detection limits for 4-MBA (LOD_4-MBA = 4.79 × 10⁻⁹ M) and MB (LOD_MB = 3.36 × 10⁻⁹ M) demonstrate this SERS technique has high sensitivity. The target molecule signal did not show a significant decline, indicating good temporal stability of the substrate. The synergistic effects arising from the electromagnetic enhancement from closely spaced Au NPs, chemical enhancement from Fe₂O₃, and enrichment by an external magnetic field endow the Au@Fe₂O₃ composite substrate with outstanding SERS performance. Moreover, the Au@Fe₂O₃ composite substrates have been successfully used to detect 4-ATP and 4-NTP in water, which has exhibited outstanding detection capability. (LOD_4-ATP = 7.25 × 10⁻⁹ M, LOD_4-NTP = 1.85 × 10⁻⁹ M).

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Au@Fe2O3纳米花作为高度敏感的SERS底物来检测水中的有机污染物

贵金属聚集体由于其高灵敏度，在环境监测和生物分析中受到越来越多的关注。在氧化物载体上沉积纳米颗粒是一种组装贵金属的有效方法。本研究采用Au@Fe2O3复合底物进行SERS检测。4-MBA （LOD4-MBA = 4.79 × 10−9 M）和MB （LODMB = 3.36 × 10−9 M）的低检出限表明该SERS技术具有较高的灵敏度。靶分子信号没有明显下降，表明底物具有较好的时间稳定性。紧密分布的Au NPs的电磁增强、Fe2O3的化学增强以及外加磁场的富集所产生的协同效应使Au@Fe2O3复合衬底具有优异的SERS性能。此外，Au@Fe2O3复合底物已成功用于水中4-ATP和4-NTP的检测，表现出优异的检测能力。(LOD4-ATP = 7.25×10−9米,LOD4-NTP = 1.85×10−9米)。

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来源期刊

Materials Science and Engineering: B 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.