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Simultaneous ultraviolet and first near-infrared window absorption of luminescent carbon dots/PVA composite film

机译：同时紫外线和第一近红外窗口的发光碳点/ PVA复合膜的吸收

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摘要

Liquid Carbon Dots (CDs) were successfully synthesized by hydrothermal method using urea and citric acid as raw materials. TEM images confirmed that the CDs have a spherical shape with a homogeneous distribution. The as-prepared liquid CDs could absorb ultraviolet (UV) and first near infra-red (NIR) window simultaneously. However, the photoluminescence (PL) of the liquid CDs was damaged by their quenching effect. To overcome this issue, the liquid CDs were dispersed in poly(vinyl) alcohol (PVA) to fabricate the composite film. Herein, the dual-peak absorption properties of the CDs/PVA composite films were investigated for the first time. The composite films could maintain the simultaneous UV and first NIR window absorption property even after being preheated up to 200 degrees C, implying that the structure of CDs was well retained during the transition from the liquid to films. Daylight treatment for seven days produced minimum changes in the UV-vis and PL spectra, which indicates that the CDs/PVA film has more stable optical properties than the liquid CDs.
机译：通过使用尿素和柠檬酸作为原料，通过水热法成功地合成了液体碳点（CDS）。 TEM图像确认CD具有具有均匀分布的球形形状。制备的液体CD可以同时吸收紫外（UV）并首先靠近红外线（NIR）窗口。然而，液体CD的光致发光（PL）因其淬火效应而损坏。为了克服这个问题，将液体CD分散在聚（乙烯基）醇（PVA）中以制造复合膜。在此，首次研究CDS / PVA复合膜的双峰吸收性能。即使在预热到200摄氏度之后，复合膜也可以保持同时UV和第一NIR窗吸收性能，这意味着CD的结构在从液体到薄膜的转变期间保持良好的保留。七天的日光治疗产生了UV-VIS和PL光谱的最小变化，表明CDS / PVA膜具有比液体CD更稳定的光学性质。

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  • 来源
    《RSC Advances》 |2019年第13期|共7页
  • 作者

    Taspika Melda; Permatasari Fitri Aulia; Nuryadin Bebeh Wahid; Mayangsari Tirta Rona; Aimon Akfiny Hasdi; Iskandar Ferry;

  • 作者单位

    Inst Teknol Bandung Dept Phys Fac Math &

    Nat Sci Jalan Ganesha 10 Bandung 40132 Indonesia;

    Inst Teknol Bandung Dept Phys Fac Math &

    Nat Sci Jalan Ganesha 10 Bandung 40132 Indonesia;

    UIN Sunan Gunung Djati Bandung Dept Phys Jl AH Nasution 105 Bandung 40614 Indonesia;

    Inst Teknol Bandung RCNN Jalan Ganesha 10 Bandung 40132 Indonesia;

    Inst Teknol Bandung Dept Phys Fac Math &

    Nat Sci Jalan Ganesha 10 Bandung 40132 Indonesia;

    Inst Teknol Bandung Dept Phys Fac Math &

    Nat Sci Jalan Ganesha 10 Bandung 40132 Indonesia;

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  • 正文语种 eng
  • 中图分类 化学;
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