Facile Fabrication of Amorphous Molybdenum Oxide as a Sensitive and Stable SERS Substrate under Redox Treatment

被引：16

作者：

Ma, Jiayu ^{[1
,2
]}

Tan, Xianjun ^{[3
]}

Ma, Yunfei ^{[1
,2
]}

Yao, Xinyun ^{[1
,2
]}

Zhang, Jinlong ^{[1
,2
]}

Wang, Lingzhi ^{[1
,2
]}

机构：

[1] East China Univ Sci & Technol, Key Lab Adv Mat, Inst Fine Chem, 130 Meilong Rd, Shanghai 200237, Peoples R China

[2] East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Inst Fine Chem, 130 Meilong Rd, Shanghai 200237, Peoples R China

[3] Tsinghua Univ, Tsinghua Berkeley Shenzhen Inst, Shenzhen 518055, Peoples R China

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2020年 / 26卷 / 12期

基金：

中国国家自然科学基金;

关键词：

amorphous materials; nanoparticles; photocatalysts; photochemistry; Raman spectroscopy; PLASMON RESONANCES; HYBRID; NANOPARTICLES; NANOSHEETS;

D O I：

10.1002/chem.201904642

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Amorphous MoO3-x nanosheets were fabricated by the room-temperature oxidation of molybdenum powder with H2O2, 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 H2O2-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.

引用

页码：2653 / 2657

页数：5