Zhong Lina, Sun Chang, Zhao Xiaomin, Zhao Qinghua
College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, China.
Nanomaterials (Basel). 2025 Mar 12;15(6):436. doi: 10.3390/nano15060436.
It is of great significance to develop carbon quantum dots (CQDs) using green carbon sources, which are cheap, non-toxic and harmless, and further expand their application scopes, e.g., fluorescence sensors, blue light screening. In this study, we have prepared Peperomia tetraphylla-based carbon quantum dots (PT-CQDs) with strong water solubility, good salt resistance, specific quenching reactions and excellent optical properties via a simple one-step hydrothermal method. In one application, PT-CQDs are utilized as a fluorescence sensor due to their high selectivity and sensitivity to ferric ions (Fe). The limit of detection (LOD) was 2.7 μmol·L. On the other hand, PT-CQDs/polyvinyl alcohol (PVA) films with excellent ultraviolet- (UV) and high-energy blue light (HEBL)-blocking properties were obtained. The obtained films exhibited a high blue light weight blocking rate of 100% in UV and 80% in HEBL. The concentrations of the composites could also be controlled to achieve the desired light-blocking rate. In addition, the composites were able to absorb blue light and convert it to other forms of light. These properties suggest their potential applications in the development of advanced blue light screening and fluorescence sensors.
使用绿色碳源开发碳量子点（CQDs）具有重要意义，这些碳源廉价、无毒无害，并且能进一步扩大其应用范围，例如荧光传感器、蓝光屏蔽。在本研究中，我们通过简单的一步水热法制备了具有强水溶性、良好耐盐性、特定猝灭反应和优异光学性能的基于豆瓣绿的碳量子点（PT-CQDs）。在一项应用中，PT-CQDs因其对铁离子（Fe）的高选择性和敏感性而被用作荧光传感器。检测限（LOD）为2.7 μmol·L。另一方面，获得了具有优异紫外线（UV）和高能蓝光（HEBL）阻挡性能的PT-CQDs/聚乙烯醇（PVA）薄膜。所得薄膜在UV中表现出100%的高蓝光重量阻挡率，在HEBL中为80%。复合材料的浓度也可以控制以达到所需的光阻挡率。此外，复合材料能够吸收蓝光并将其转化为其他形式的光。这些特性表明它们在先进蓝光屏蔽和荧光传感器开发中的潜在应用。
