Effective UV and blue light blocking filters with high visible transparency utilizing graphene quantum dots

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments Pub Date : 2025-04-02 DOI:10.1016/j.dyepig.2025.112802

F.S. Abd El-kawy , S. Hammad , H. Talaat , M. Ghali

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Abstract

In the current technological era, our eyes suffer serious diseases as a consequence of exposure to ultraviolet and blue radiation from light-emitting devices. Accordingly, the development of materials with effective absorption abilities for UV and blue light is in high demand. Here, we report the synthesis of graphene quantum dots (GQDs) from Moringa oleifera leaves utilizing the hydrothermal technique. Different amounts from the prepared GQDs solution were added to the Poly(vinyl) alcohol (PVA) to fabricate UV and blue light-blocking films with concentrations of (0, 3, 5, 7, 9, 10 %). These films were examined to explore their blocking potential. Interestingly, the data demonstrate that GQDs/PVA films can block up to 97.68 % and 96.21 % of harmful UV and blue light, respectively, with transmittance greater than 70 % in the visible regions (>600 nm). Further, the films were applied to WLED commercial lamps, and it was found that with increasing GQD concentrations, the blue region decreased with a blocking ratio of up to 91.38 %, and the LED light was changed from cool (6310 K) to warm (3300 K) white LEDs. These results prove that the sustainably fabricated GQDs films have strong down photoconversion ability and remarkable absorption in the UV and blue light regions.

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利用石墨烯量子点的高可见透明度的有效紫外线和蓝光阻挡滤光片

在当今的科技时代，由于暴露在发光设备的紫外线和蓝色辐射下，我们的眼睛遭受严重的疾病。因此，开发对紫外线和蓝光具有有效吸收能力的材料是迫切需要的。在这里，我们报道了利用水热技术从辣木叶合成石墨烯量子点（GQDs）。将制备好的GQDs溶液加入到聚乙烯醇（PVA）中，分别制备了浓度为（0、3、5、7、9、10%）的UV和蓝光阻隔膜。对这些薄膜进行了检查，以探索它们的阻断潜力。有趣的是，数据表明，GQDs/PVA薄膜可以分别阻挡97.68%和96.21%的有害紫外线和蓝光，在可见光区（>600 nm）的透过率大于70%。将薄膜应用于WLED商用灯中，发现随着GQD浓度的增加，蓝色区域减少，遮挡率高达91.38%，LED光由冷态（6310 K）变为暖态（3300 K）白光。这些结果证明了可持续制备的GQDs薄膜具有较强的下光转换能力和在紫外和蓝光区的显著吸收。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Dyes and Pigments 工程技术-材料科学：纺织

CiteScore

8.20

自引率

13.30%

发文量

933

审稿时长

33 days

期刊介绍： Dyes and Pigments covers the scientific and technical aspects of the chemistry and physics of dyes, pigments and their intermediates. Emphasis is placed on the properties of the colouring matters themselves rather than on their applications or the system in which they may be applied. Thus the journal accepts research and review papers on the synthesis of dyes, pigments and intermediates, their physical or chemical properties, e.g. spectroscopic, surface, solution or solid state characteristics, the physical aspects of their preparation, e.g. precipitation, nucleation and growth, crystal formation, liquid crystalline characteristics, their photochemical, ecological or biological properties and the relationship between colour and chemical constitution. However, papers are considered which deal with the more fundamental aspects of colourant application and of the interactions of colourants with substrates or media. The journal will interest a wide variety of workers in a range of disciplines whose work involves dyes, pigments and their intermediates, and provides a platform for investigators with common interests but diverse fields of activity such as cosmetics, reprographics, dye and pigment synthesis, medical research, polymers, etc.