4.6 Article

Solid-State Phosphors from Coal-Derived Carbon Quantum Dots

期刊

ACS OMEGA
卷 8, 期 28, 页码 25410-25423

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acsomega.3c02884

关键词

-

向作者/读者索取更多资源

With unique properties, carbon quantum dots (CQDs) have various applications in different fields. This study presents a sustainable synthesis of solid phosphors from coal-derived CQDs using poly(vinyl alcohol) (PVA) and silica (SiO2) as matrix. The obtained CQDs exhibited blue fluorescence and were self-co-doped with nitrogen and sulfur heteroatoms. The solid-state fluorescence of PVA/CQD composite films and SiO2/CQD phosphors were successfully achieved, and the latter showed high-intensity white light emission for potential optical applications.
With unique optical and chemical properties, carbon quantumdots(CQDs) find tremendous applications in chemistry, biology, and materialsscience to medicine. To expand the applicability of coal-derived CQDsfrom the liquid to solid state, we herein report the sustainable synthesisof solid phosphors from coal-derived CQDs using poly(vinyl alcohol)(PVA) and silica (SiO2) as an organic and inorganic matrix.Two coal-derived CQDs were obtained using an eco-friendly ultrasonic-assistedwet oxidation method. The structural and chemical properties of theCQDs were extensively investigated and compared with commercial CQDs.The coal-derived CQDs exhibited blue fluorescence with 8.9 and 14.9%quantum yields. The CQDs were found to be self-co-doped with nitrogenand sulfur heteroatoms through surface and edge functional groups.Solid-state fluorescence of PVA/CQD composite films confirmed thatthe CQDs retained their excellent blue emission in a dry solid matrix.A facile one-pot sol-gel method was employed to fabricate SiO2/CQD phosphors with the unique fluorescence emission. Dueto their special structural features, coal-derived CQDs favored theheterogeneous nucleation and rapid formation of SiO2/CQDphosphors. Further, coal-derived CQDs caused high-intensity whitelight emission with CIE coordinates of (0.312, 0.339) by endowinga suitable band gap structure in a SiO2/CQD solid phosphorfor potential optical applications.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据