在几秒钟内通过一步微波热解鱼鳞废料制备超亮碳纳米洋葱,Green Chemistry

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在几秒钟内通过一步微波热解鱼鳞废料制备超亮碳纳米洋葱
Green Chemistry ( IF 9.3 ) Pub Date : 2022-04-25 , DOI: 10.1039/d1gc04785j
Yunzi Xin ₁ , Kai Odachi ₂ , Takashi Shirai _{1,

2}

Affiliation

碳纳米洋葱（CNOs）是最有前途的碳纳米形式之一，在全世界引起了人们的兴趣，并已广泛应用于电子、光伏、催化和生物医学诊断。CNOs的常规合成技术需要苛刻的实验条件，例如高温和真空，耗时长，或者需要高成本的碳源、额外的催化剂和危险的强酸/碱；这些是阻碍 CNO 轻松合成的重大缺陷。在此，我们报告了一种通过在几秒钟内对鱼鳞废物进行一步微波热解。在合成阶段也建立了 CNO 的同时表面功能化。所获得的 CNO 的高度结晶的多壳核态和良好功能化的表面促进了可见光致发光，其发射宽度小于 90 nm，量子产率高达 40%，这是最高值和高出 10 倍与传统制备的现有 CNO相比更复杂的方法。在各种极性溶剂和固态照明应用（如蓝光发光柔性薄膜和 LED）中也实现了出色的分散性和稳定的发射。所提出的用于高性能CNO的超简便和多功能合成技术为绿色和可持续合成先进的功能纳米材料提供了新的机会。

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Fabrication of ultra-bright carbon nano-onions via a one-step microwave pyrolysis of fish scale waste in seconds

Carbon nano-onions (CNOs), one of the most promising carbon nanoforms, have drawn interest worldwide and have been applied extensively in electronics, photovoltaics, catalysis, and biomedical diagnostics. Conventional synthetic techniques of CNOs require harsh experimental conditions, such as high temperature and vacuum, are time consuming, or require high-cost carbon sources, extra catalysts, and hazardous strong acids/bases; these are significant drawbacks that hinder the facile synthesis of CNOs. Herein, we report a novel preparation of ultra-bright CNOs via a one-step microwave pyrolysis of fish scale waste within seconds. Simultaneous surface functionalization of CNOs is also established at the synthesis stage. The highly crystallized multiple-shelled core-state and well-functionalized surface of the obtained CNOs facilitates a visible photoluminescence with a narrow emission width less than 90 nm and a superior quantum yield of 40%, which is the highest value and 10-fold higher compared with the existing CNOs conventionally prepared via the much more complicated approaches. Excellent dispersibility along with a steady emission in various polar solvents and solid-state lighting applications such as blue-light-emitting flexible film and LED was also achieved. The presented super-facile and versatile synthetic technique for high-performance CNOs presents a novel opportunity for the green and sustainable synthesis of advanced functional nanomaterials.

更新日期：2022-04-25

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