煤沥青衍生黄色发射碳点及其在太阳能发光聚光器中的应用

IF 2.7 4区 材料科学 Q3 CHEMISTRY, PHYSICAL
Xiaohua Li, Qing Chang, Chaorui Xue, Ning Li, Bin Liu, Wenjing Zheng, Jinlong Yang, Shengliang Hu
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引用次数: 0

摘要

碳点是一种极具发展前景的光致发光材料,利用煤沥青作为碳源合成碳点在全球碳中和需求中发挥着重要作用。然而,从煤沥青中提取的cd主要是有限的蓝色排放。本研究通过从煤沥青中提取轻质芳香族化合物,并在二氯甲烷中进行溶剂热处理,在少量硝酸和硫酸的存在下,开发了一条以煤沥青为原料合成黄发射CDs的新途径。值得注意的是,所制备的CDs具有与激发无关的黄色发射、大的Stokes位移和光稳定性。对CDs在发光太阳能聚光器(LSCs)中的应用进行了评价。结果表明,CDs可以很好地分散在聚甲基丙烯酸甲酯(PMMA)基质中,制备透明LSCs。在模拟太阳光照(100 mW cm−2)条件下,以最佳CDs浓度合成的LSC (4 × 4 × 0.2 cm3)的光转换效率(ηopt)为3.31%,功率转换效率(ηPCE)为1.95%。本研究为利用煤沥青的天然化学性质合成性能优良的新型cd材料提供了一条新途径。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Coal Pitch Derived Yellow-Emissive Carbon Dots and Their Application in Luminescent Solar Concentrators

Coal Pitch Derived Yellow-Emissive Carbon Dots and Their Application in Luminescent Solar Concentrators
Using coal pitch as the carbon source to synthesize carbon dots (CDs), one of the most promising photoluminescence (PL) materials, can play an important role in the global demand for carbon neutralization. However, the reported CDs derived from coal pitch are mainly limited blue emission. Here, a new route to synthesize yellow-emissive CDs from coal pitch is developed by extracting the lightweight aromatic compounds from coal pitch and solvothermally treating the extracts in dichloromethane in the presence of a small amount of nitric acid and sulfuric acid. Notably, the obtained CDs exhibit excitation independent yellow emission, large Stokes shift and good photostability. The application of the CDs for luminescent solar concentrators (LSCs) is evaluated. It is found that the CDs can be well dispersed in polymethyl methacrylate (PMMA) matrix and fabricated transparent LSCs. The synthesized LSC (4 × 4 × 0.2 cm3) with the optimal CDs concentration exhibits an optical conversion efficiency (ηopt) of 3.31% and power conversion efficiency (ηPCE) of 1.95% under simulated sun light illumination (100 mW cm−2). This research offers a new strategy to synthesize new kind of CDs with desired performance by exploiting the native chemistries of coal pitch.
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来源期刊
Particle & Particle Systems Characterization
Particle & Particle Systems Characterization 工程技术-材料科学:表征与测试
CiteScore
5.50
自引率
0.00%
发文量
114
审稿时长
3.0 months
期刊介绍: Particle & Particle Systems Characterization is an international, peer-reviewed, interdisciplinary journal focusing on all aspects of particle research. The journal joined the Advanced Materials family of journals in 2013. Particle has an impact factor of 4.194 (2018 Journal Impact Factor, Journal Citation Reports (Clarivate Analytics, 2019)). Topics covered include the synthesis, characterization, and application of particles in a variety of systems and devices. Particle covers nanotubes, fullerenes, micelles and alloy clusters, organic and inorganic materials, polymers, quantum dots, 2D materials, proteins, and other molecular biological systems. Particle Systems include those in biomedicine, catalysis, energy-storage materials, environmental science, micro/nano-electromechanical systems, micro/nano-fluidics, molecular electronics, photonics, sensing, and others. Characterization methods include microscopy, spectroscopy, electrochemical, diffraction, magnetic, and scattering techniques.
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