Chen Mingying, Wu Danni, Deng Xiaoye, Li Yingjie, Sun Xiaoqin, Ma Junjie, Chen Congjin, Liao Xiufen, Liu Xijun
Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China.
Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China; Key Laboratory of New Low-carbon Green Chemical Technology, Education Department of Guangxi Zhuang Autonomous Region, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China.
Int J Biol Macromol. 2025 Apr;304(Pt 2):141029. doi: 10.1016/j.ijbiomac.2025.141029. Epub 2025 Feb 13.
Carbon dots (CDs), revolutionary carbon-based nanomaterial, have demonstrated tremendous potential for applications across multiple areas. Chitin-rich shrimp shells are a sustainable and renewable resource, and their utilization can turn waste into treasure. This work is dedicated to efficiently preparing nitrogen-doped green fluorescent CDs (N-CDs) for multi-modal applications from waste shrimp shells by hydrothermal methods. The detailed spectroscopic characterization reveals that the N-CDs possess excellent optical properties. The quantum yield is as high as 33.2%. Specifically, the N-CDs show excellent selectivity and sensitivity in the quantitative detection of Fe. Additionally, in response to pH changes, the surface functional groups of the N-CDs undergo protonation and deprotonation, leading to corresponding alterations in fluorescence colors. Capitalizing on this characteristic, a visual portable pH-measuring platform is developed. This platform ingeniously integrates nanoscale optical sensors with smartphone image processing technology, enabling real-time and highly accurate monitoring of environmental pH levels. Furthermore, they are ideal materials for fluorescence anti-counterfeiting detection due to their unique optical properties. This work simultaneously accomplishes the reuse of waste biomass and provides novel insights for multi-orbital applications, including metal ion detection, pH monitoring, and the anti-counterfeiting field.
碳点（CDs）作为一种具有革命性的碳基纳米材料，已在多个领域展现出巨大的应用潜力。富含几丁质的虾壳是一种可持续的可再生资源，对其加以利用能够变废为宝。这项工作致力于通过水热法从废弃虾壳中高效制备用于多模态应用的氮掺杂绿色荧光碳点（N-CDs）。详细的光谱表征表明，N-CDs具有优异的光学性能。量子产率高达33.2%。具体而言，N-CDs在铁的定量检测中表现出优异的选择性和灵敏度。此外，响应pH值变化时，N-CDs的表面官能团会发生质子化和去质子化，导致荧光颜色相应改变。利用这一特性，开发了一种可视化便携式pH测量平台。该平台巧妙地将纳米级光学传感器与智能手机图像处理技术相结合，能够实时、高精度地监测环境pH值水平。此外，由于其独特的光学性质，它们是荧光防伪检测的理想材料。这项工作在实现废弃生物质再利用的同时，也为包括金属离子检测、pH监测和防伪领域在内的多轨道应用提供了新的见解。
