Stimuli responsive multicolour fluorescence emission in carbon nanodots and application in metal free hydrogen evolution from water,Nanoscale Advances

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Stimuli responsive multicolour fluorescence emission in carbon nanodots and application in metal free hydrogen evolution from water
Nanoscale Advances ( IF 4.6 ) Pub Date : 2020-12-8 , DOI: 10.1039/d0na00799d
Subir Paul ₁ , Arindam Banerjee ₁

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The present study convincingly demonstrates visible light induced continuous tuning of the fluorescence of carbon nanodots from yellow to cyan within two hours. These carbon dots are well characterized using field emission gun transmission electron microscopy (FEG-TEM), X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared spectroscopy (FT-IR), fluorescence spectroscopy and UV-visible spectroscopy. Moreover, solid state fluorescence of different wavelengths has also been obtained from these colour tunable carbon dots by circumventing the common problem of aggregation induced quenching of fluorescence in the solid state. These carbon dots have also shown a very low band gap and the yellow emissive C-dots have been successfully utilized as a photocathode in metal free photo-electrochemical hydrogen evolution from water.

中文翻译：

碳纳米点的刺激响应多色荧光发射及其在水中无金属析氢中的应用

本研究令人信服地证明，可见光诱导碳纳米点的荧光在两小时内从黄色连续调谐到青色。使用场发射枪透射电子显微镜 (FEG-TEM)、X 射线光电子能谱 (XPS)、傅里叶变换红外光谱 (FT-IR)、荧光光谱和紫外-可见光谱对这些碳点进行了很好的表征。此外，通过规避固态荧光聚集引起的猝灭的常见问题，这些颜色可调碳点还获得了不同波长的固态荧光。这些碳点还表现出非常低的带隙，并且黄色发射碳点已成功用作从水中进行无金属光电化学析氢的光电阴极。

更新日期：2020-12-23

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