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Green and size-controllable synthesis of photoluminescent carbon nanoparticles from waste plastic bags

机译：从废塑料袋以绿色和大小可控的方式合成光致发光碳纳米粒子

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摘要

We have developed a facile approach for green and size-controllable synthesis of photoluminescent carbon nanoparticles (CNPs) by hydrothermal treatment of various waste plastic bags (WPBs) in low-concentration H2O2 solutions (<= 5.0 wt%). This approach requires no toxic regents, severe synthetic conditions, or complicated procedures. Fine control over the particle size of the CNPs is achieved by simply changing the H2O2 concentration, and higher H2O2 concentration leads to smaller particle size of the CNPs. An interesting formation mechanism of the CNPs derived from WPBs has been proposed including thermo-oxidative degradation, polymerization, carbonization, and passivation. It is found that the CNPs can selectively quantify the concentration of Fe3+ from 10 to 400 mu M with a detection limit as low as 2.8 mu M. Moreover, the strong photoluminescence, excellent optical stability, low cytotoxicity, and good water-dispersibility of the CNPs make them suitable candidates for cellular imaging. The simple method developed here presents a new way for effective reuse of WPBs and realizes the encouraging "waste-totreasure" conversion.
机译：我们已经开发了一种通过在低浓度H2O2溶液（<= 5.0 wt％）中对各种废塑料袋（WPB）进行水热处理来进行绿色和尺寸可控制的合成光致发光纳米颗粒（CNP）的简便方法。这种方法不需要有毒的试剂，严格的合成条件或复杂的程序。只需更改H2O2的浓度即可实现对CNPs粒度的精细控制，而更高的H2O2浓度则可导致CNPs的粒度更小。已经提出了有趣的衍生自WPB的CNP的形成机理，包括热氧化降解，聚合，碳化和钝化。发现CNP可以选择性地定量检测Fe3 +的浓度，浓度范围为10至400μM，检测限低至2.8μM。此外，CNP的强光致发光性，优异的光学稳定性，低细胞毒性和良好的水分散性CNP使它们成为细胞成像的合适候选者。这里开发的简单方法提供了一种有效重用WPB的新方法，并实现了令人鼓舞的“废物-宝藏”转换。

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