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碳点的POE介导可调量量子产量 - - 来自Agapanthus Africanus (L.) 霍夫曼叶片
Paulo J Nunes1, Rui F P Pereira2, S C Nunes3
1CQ-VR, University of Trás-os-Montes e Alto Douro, Vila Real, 5000-801, Portugal.
Small (Weinheim an der Bergstrasse, Germany)
|October 3, 2024
概括
来自Agapanthus africanus叶的碳点 (CD) 的绿色合成产生发光材料. 将这些CD嵌入到二-ureaasil矩阵中可以提高它们的量子产量,从而为潜在的应用提供更多的空间.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 绿色化学 绿色化学
背景情况:
- 从自然资源中制造碳点 (CD) 的可持续和可扩展方法的开发至关重要.
- 霍夫曼叶 (Agapanthus africanus (L.) Hoffmann) 叶提供了一个易于获得的生物质,用于绿色合成.
研究的目的:
- 为了实现Agapanthus africanus叶的碳点 (CD) 的绿色合成.
- 描述合成的CD并评估它们的光发光特性.
- 研究将CD嵌入二-ureaasil矩阵对其光学特性和表面特征的影响.
主要方法:
- 碳化Agapanthus africanus叶子在200/300°C下2/3小时生成CD.
- 使用技术来确定CD的尺寸,表面功能组和组成的特征.
- 光发光谱学用于测量辐射光谱和量子产量 (QY).
- 通过将CD嵌入到二-ureaasil矩阵中来制造混合膜.
主要成果:
- 合成CD (CZ-X-Y) 的平均尺寸在3.7至5.3纳米之间.
- 表面分析显示了基,碳基和基基的存在,除了叶绿素.
- 隔离的CZ-300-3CD在400nm处呈现蓝色辐射 (在260nm处激发),QY为2±1%.
- 将CD嵌入到二-ureaasil矩阵中,产生了具有增强的排放最大值 (420/450nm) 和显著改善的QY值 (7-16%).
- 磁盘改变了混合膜的表面粗性和湿透性.
结论:
- 从Agapanthus africanus叶子中成功合成碳点的绿色合成.
- 尿素矩阵有效地被动化并增强CDs的光发光量子产量.
- 合成的CD显示了在光学材料和表面修饰方面的应用潜力.
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