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MoO3 nanosheet-assisted photochemical reduction synthesis of Au nanoparticles for surface-enhanced Raman scattering substrates

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文献类型：外文期刊

作者： Su, Linjing ¹ ; Xiong, Yuhao ¹ ; Chen, Zhengyi ⁴ ; Duan, Zhenhua ¹ ; Luo, Yanghe ¹ ; Zhu, Dongjian ¹ ; Ma, Xionghui ² ;

作者机构： 1.Hezhou Univ, Coll Food & Bioengn, Hezhou 542899, Peoples R China

2.Chinese Acad Trop Agr Sci, Anal & Test Ctr, Haikou 571101, Hainan, Peoples R China

3.Minist Agr, Lab Qual & Safety Risk Assessment Trop Prod Haiko, Haikou 571101, Hainan, Peoples R China

4.Guilin Univ Technol, Coll Chem & Bioengn, Guilin 541004, Peoples R China

关键词： Gold nanoparticle; UV-assisted photochemical reduction; Molybdenum oxide; Surface-enhanced Raman scattering

期刊名称：SENSORS AND ACTUATORS B-CHEMICAL （影响因子：7.46；五年影响因子：6.743 ）

ISSN： 0925-4005

年卷期： 2019 年 279 卷

页码：

收录情况： SCI

摘要： Innovation in gold nanoparticles (AuNPs) preparation is fundamental for realization of various functionalities. Thus, the development of robust strategies for synthesizing AuNPs is attractive. Herein, we experimentally demonstrate a facile method for AuNPs synthesis based on two-dimensional semiconductor molybdenum oxide (MoO3), combined with a photochemical process. In this synthesis route, MoO3 nanosheets are used as electron carriers and sacrificial templates to direct the wet-chemical epitaxial growth of AuNPs under ultraviolet (UV) irradiation without requiring another chemical reducing agent or stabilizer. The as-synthesized AuNPs were extensively characterized to investigate their formation mechanism. As a proof of concept, as-synthesized AuNPs were employed as homogeneous surface-enhanced Raman scattering (SERS)-active substrate to construct a detection platform for malachite green (MG) pigment. The SERS detection method was also evaluated by quantitative analysis of MG in real fish samples. We believe that templating with MoO3 nanosheets and using UV-assisted photochemical reduction to prepare AuNPs via a wet-chemical reaction is a promising strategy, which is expected to be applicable to the production of other novel noble metal functional nanomaterials.

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