The surface-enhanced Raman scattering of all-inorganic perovskite quantum dots of CsPbBr3 encapsulated in a ZIF-8 metal–organic framework,New Journal of Chemistry

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The surface-enhanced Raman scattering of all-inorganic perovskite quantum dots of CsPbBr3 encapsulated in a ZIF-8 metal–organic framework
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2020-09-28 , DOI: 10.1039/d0nj03587d
Mingyang Xin _{1,

2,

3,

4,

5} , Yuzhou Fu _{1,

2,

3,

4,

5} , Yue Zhou _{1,

2,

3,

4,

5} , Junhe Han _{1,

2,

3,

4,

5} , Yanli Mao _{1,

2,

3,

4,

5} , Mengjia Li _{5,

6,

7,

8} , Junhui Liu _{1,

2,

3,

4,

5} , Mingju Huang _{1,

2,

3,

4,

5}

Affiliation

In this study, composites composed of all-inorganic perovskite quantum dots (QDs) of CsPbBr₃ encapsulated in a metal–organic framework of ZIF-8 (CsPbBr₃@ZIF-8) were prepared using an in situ chemical reduction method. For the first time, the CsPbBr₃@ZIF-8 composites were used for surface-enhanced Raman scattering (SERS). The CsPbBr₃@ZIF-8 composites remained effective and emitted normal luminescence under UV illumination after 200 days of storage at room temperature, indicating that they were able to overcome the instability of perovskite QDs at room temperature and that they can be stored for long-term use. The enhancement factor value is 1.17 × 10⁵. The adsorption behavior of 4-mercaptopyridine (4-MPY) on the CsPbBr₃@ZIF-8 composites was studied using typical SERS spectral bands, and these were contrasted with the SERS spectra on silver films. The enhancement mechanism is attributed to a charge transfer contribution. The results indicate that CsPbBr₃@ZIF-8 composites have potential application in SERS detection.

中文翻译：

ZIF-8金属-有机骨架中封装的CsPbBr3的全无机钙钛矿量子点的表面增强拉曼散射

在这项研究中，使用原位化学还原方法制备了由CsPbBr ₃的全无机钙钛矿量子点（QDs）包裹在ZIF-8的金属有机框架中的复合材料（CsPbBr ₃ @ ZIF-8）。首次将CsPbBr ₃ @ ZIF-8复合材料用于表面增强拉曼散射（SERS）。在室温下储存200天后，CsPbBr ₃ @ ZIF-8复合材料仍然有效，并在紫外线照射下发出正常的发光，这表明它们能够克服钙钛矿QD在室温下的不稳定性，并且可以长期保存。长期使用。增强因子值为1.17×10 ⁵。利用典型的SERS谱带研究了4-巯基吡啶（4-MPY）在CsPbBr ₃ @ ZIF-8复合材料上的吸附行为，并与银膜上的SERS谱进行了对比。增强机制归因于电荷转移贡献。结果表明，CsPbBr ₃ @ ZIF-8复合材料在SERS检测中具有潜在的应用前景。

更新日期：2020-10-19

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