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首页> 外文期刊>New Journal of Chemistry >Carbon dots prepared in different solvents with controllable structures: optical properties, cellular imaging and photocatalysis
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Carbon dots prepared in different solvents with controllable structures: optical properties, cellular imaging and photocatalysis

机译：在具有可控结构的不同溶剂中制备的碳点：光学性质，蜂窝成像和光催化

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摘要

The preparation of carbon dots (CDs) featuring almost the same structures in different solvents is beneficial for their direct applications in the desired media without additional treatment and for resource conservation. The structures of CDs, however, are vulnerable to the synthetic system, unfavorably forming "identical'' CDs in different solvents. Herein, we developed a top-down method to explore the feasibility of preparing similar CDs from ZIF-8-derived solid porous carbons that comprising graphitic carbon embedded into the amorphous carbon domains in water, amide and alcohol. To attenuate the solvent effect, the porous carbon was oxidized by nitric acid prior to solvothermal/hydrothermal treatment. The use of oxidized porous carbon as precursors can result in the formation of CDs using a mild thermal treatment. Other than CDs prepared in amide (in DMF, CDs-d), the resulting CDs prepared in water (CDs-w) and in alcohol (in methanol, CDs-m) possess similar components and structures, as confirmed by XPS and DLS. Thus, both CDs-w and CDs-m aqueous suspensions exhibit excitation wavelength-dependent PL properties with the same emission maxima. CDs-w was directly applied in aqueous systems and gave slightly enhanced performance in cellular imaging and solar hydrogen evolution. Significantly, this research offers an available strategy to advance CD performance and reduce pollutant emission.
机译：在不同溶剂中具有几乎相同结构的碳点（CDS）的制备是有益于其在所需介质中的直接应用，而无需额外的治疗和资源保护。然而，CD的结构容易受到合成系统的影响，在不同的溶剂中不利地形成“相同”的CD。在此，我们开发了一种自上而下的方法，用于探讨从ZIF-8衍生的固体多孔制备类似CD的可行性包括嵌入水，酰胺和醇中的无定形碳结构域的石墨碳的碳。为了衰减溶剂效果，在溶剂热/水热处理之前通过硝酸氧化多孔碳。使用氧化多孔碳作为前体可产生使用温和的热处理形成Cds。除了在酰胺（在DMF，CDS-D）中制备的Cd，在水（CdS-W）和醇中制备的所得Cds（甲醇，CDS-M）具有相似的组分由XPS和DLS证实的结构。因此，Cds-W和Cds-M水溶液两者都表现出具有相同发射最大值的激发波长依赖性PL性能。Cds-W直接在含水系统中施用于SLI蜂窝成像和太阳能氢气进化中的GHTLY增强的性能。值得注意的是，本研究提供了可用的策略来推进CD性能并减少污染物排放。

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  • 来源
    《New Journal of Chemistry》 |2018年第3期|共8页
  • 作者

    Chen Liyong; Zhang Yingyue; Duan Binhua; Gu Zhizhi; Guo Yuting; Wang Huifang; Duan Chunying;

  • 作者单位

    Dalian Univ Technol State Key Lab Fine Chem Dalian 116024 Peoples R China;

    Dalian Univ Technol State Key Lab Fine Chem Dalian 116024 Peoples R China;

    Dalian Univ Technol State Key Lab Fine Chem Dalian 116024 Peoples R China;

    Dalian Univ Technol State Key Lab Fine Chem Dalian 116024 Peoples R China;

    Dalian Univ Technol State Key Lab Fine Chem Dalian 116024 Peoples R China;

    Dalian Univ Technol State Key Lab Fine Chem Dalian 116024 Peoples R China;

    Dalian Univ Technol State Key Lab Fine Chem Dalian 116024 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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