Facile Fabrication of Amorphous Molybdenum Oxide as a Sensitive and Stable SERS Substrate under Redox Treatment.,Chemistry - A European Journal

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Facile Fabrication of Amorphous Molybdenum Oxide as a Sensitive and Stable SERS Substrate under Redox Treatment.
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2020-01-23 , DOI: 10.1002/chem.201904642
Jiayu Ma ₁ , Xianjun Tan ₂ , Yunfei Ma ₁ , Xinyun Yao ₁ , Jinlong Zhang ₁ , Lingzhi Wang ₁

Affiliation

Amorphous MoO3-x nanosheets were fabricated by the room-temperature oxidation of molybdenum powder with H2 O2 , followed by light-irradiation reduction in methanol. When applied as a substrate for surface-enhanced Raman spectroscopy (SERS), these nanosheets exhibit higher sensitivity than the crystalline counterpart for a wide range of analytes. Moreover, the SERS activity remains stable on repeated oxygen insertion/extraction. In contrast, the performance of crystalline MoO3-x continuously deteriorates on successive redox treatments. This unique SERS activity allows the recycling of the substrate through an H2 O2 -based Fenton-like reaction. More importantly, the non-invasive SERS was unprecedentedly used for the self-diagnosis of amorphous MoO3-x as a more selective photocatalyst than its crystalline counterpart.

中文翻译：

氧化还原处理下作为敏感而稳定的SERS衬底的无定形氧化钼的简便制备。

通过用H2 O2在室温下氧化钼粉，然后在甲醇中进行光辐照还原，制备出非晶态的MoO3-x纳米片。当将其用作表面增强拉曼光谱（SERS）的底物时，这些纳米片对多种分析物的敏感性要比结晶性对应物高。而且，SERS活性在反复的氧气插入/抽出后保持稳定。相反，在连续的氧化还原处理中，结晶MoO3-x的性能持续下降。这种独特的SERS活性可通过基于H2 O2的Fenton样反应回收底物。更重要的是，非侵入性SERS被史无前例地用于非晶态MoO3-x的自诊断，它比晶态MoO3-x更具选择性。

更新日期：2020-01-23

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