Polypropylene-Derived Luminescent Carbon Dots

IF 8.7 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Materials Letters Pub Date : 2024-04-12 DOI:10.1021/acsmaterialslett.3c01419

Yongqi Yang, Sneha Sreekumar, Robert V. Chimenti, Maxim Veksler, Kai Song, Sofia Zhang, Daphne Rodas, Victoria Christianson and Deirdre M. O’Carroll*,

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Abstract

Polypropylene is one of the most challenging plastics to recycle or upcycle due to its excellent chemical and thermal stability. Here, we report an effective two-step synthesis to prepare carbon dots (CDs) from polypropylene (PP). In the first step, bulk PP is converted to PP nanoparticles (PP-NPs) by using a reprecipitation process. In the second step, the PP-NPs are carbonized by a hydrothermal treatment. The size, structure, and photonic properties of the PP-CDs vary significantly with hydrothermal treatment temperature. At higher temperature, the PP-CDs product is ∼2.5 nm in diameter with a quantum yield of 10.3% and is free from unconverted PP. At lower temperature (120 °C), the PP-CDs are large in size (∼70 nm) and exhibit low quantum yield (0.2%). This work demonstrates an effective method to fully convert polypropylene to carbon dots and shows a high degree of tunability in the size, structure, and photonic properties of the product.

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聚丙烯发光碳点

聚丙烯具有优异的化学和热稳定性，是最难回收利用的塑料之一。在此，我们报告了一种用聚丙烯（PP）制备碳点（CD）的有效两步合成法。第一步，通过再沉淀法将聚丙烯块转化为聚丙烯纳米颗粒（PP-NPs）。第二步，通过水热处理对 PP-NPs 进行碳化。PP-CD 的尺寸、结构和光子特性随水热处理温度的变化而显著不同。在较高温度下，PP-CDs 产物的直径为 2.5 纳米，量子产率为 10.3%，且不含未转化的 PP。在较低温度（120 °C）下，PP-CDs 尺寸较大（∼70 nm），量子产率较低（0.2%）。这项工作展示了将聚丙烯完全转化为碳点的有效方法，并显示了产品在尺寸、结构和光子特性方面的高度可调性。

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来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.