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Effect of reaction temperature on properties of carbon nanodots and their visible-light photocatalytic degradation of tetracyline

机译：反应温度对碳纳米蛋白质性能及其可见光光催化降解丁基氨基的影响

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摘要

Water-soluble carbon nanodots (CNDt) with diverse sizes, crystal structures, surface properties, and characteristic fluorescence spectra were synthesized by the hydrothermal carbonization of larch at different temperatures. The effects of reaction temperature on the diameter distribution, structural components, and fluorescence properties of the CNDt were investigated systematically. The synthesized CNDt were found to be monodispersed spherical polymer nanodots with a low degree of aromatization and abundant oxygen-containing groups on their surface. Increasing the reaction temperature decreased the average size of the nanodots from 20.35 to 6.48 nm, while their quantum yield increased from 13% to 18%. Broader and weaker UV characteristic peaks were detected when the reaction temperature was increased from 200 to 260 degrees C. All the CNDt samples exhibited excitation and emissionindependent properties, and obvious blue shift of the excitation and emission peaks occurred at higher reaction temperatures owing to the smaller size and different surface properties obtained. The CNDt were used as a photosensitizer in a CND/TiO2 system to effectively degrade tetracycline hydrochloride (TCH) under visible-light irradiation. The obvious blue shift exhibited by the smaller CNDt allowed the light to be fully used by the TiO2, resulting in nearly 100% TCH degradation for CND260/TiO2.
机译：通过不同温度下落叶松的水热碳化合成了具有多种尺寸，晶体结构，表面性质和特征荧光光谱的水溶性碳纳多（CNDT）。系统地研究了反应温度对直径分布，结构组分和CNDT的荧光性质的影响。发现合成的CNDT是单分散的球形聚合物纳米型，其表面上具有低芳香化和丰富的含氧基团。增加反应温度降低了纳米蛋白的平均尺寸为20.35至6.48nm，而它们的量子产量从13％增加到18％。更广泛和更弱的UV特征峰时，将反应温度从200由于较小的增加至260℃。所有CNDt样品表现出激发和emissionindependent属性，激发和发射峰的明显蓝移发生在较高的反应温度进行检测获得的尺寸和不同的表面性质。 CNDT用作CND / TiO2系统中的光敏剂，以在可见光照射下有效降解四环素盐酸盐（TCH）。较小的CNDT表现出明显的蓝色偏移允许通过TiO 2充分利用光，导致CND260 / TiO2的近100％TCH降解。

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  • 来源
    《RSC Advances》 |2015年第92期|共11页
  • 作者

    Wu Qiong; Li Wei; Wu Peng; Li Jian; Liu Shouxin; Jin Chunde; Zhan Xianxu;

  • 作者单位

    Northeast Forestry Univ Coll Mat Sci &

    Engn Harbin 150040 Peoples R China;

    Northeast Forestry Univ Coll Mat Sci &

    Engn Harbin 150040 Peoples R China;

    Northeast Forestry Univ Coll Mat Sci &

    Engn Harbin 150040 Peoples R China;

    Northeast Forestry Univ Coll Mat Sci &

    Engn Harbin 150040 Peoples R China;

    Northeast Forestry Univ Coll Mat Sci &

    Engn Harbin 150040 Peoples R China;

    Key Lab Wood Sci &

    Technol Hangzhou 310000 Zhejiang Peoples R China;

    Dehua TB New Decorat Co Ltd Huzhou 313200 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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