Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, School of Light Industry and Food Engineering, Guangxi University, Nanning 530000, People's Republic of China.
Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, School of Light Industry and Food Engineering, Guangxi University, Nanning 530000, People's Republic of China.
Int J Biol Macromol. 2024 Mar;260(Pt 2):129626. doi: 10.1016/j.ijbiomac.2024.129626. Epub 2024 Jan 22.
Widespread occurrence of sulfides in domestic and industrial wastewater contributes to environmental pollution and poses risks to human health. Therefore, the development of highly selective, sensitive, and rapid sulfur ion (S) detection probes in aquatic ecosystems is of paramount importance. In this study, lignin-stabilized silver nanoprisms (EHL@AgNPRs) were prepared using the seed growth and self-assembly methods. Based on this, a novel, high-performance, and environmentally friendly S colorimetric detection method was proposed. Lignin is believed to coat the surface of AgNPRs through cation-π and electrostatic interactions, acting as an excellent dispersant and stabilizer to prevent aggregation and shape deformation. This allows AgNPRs to maintain localized surface plasmon resonance (LSPR) characteristics and superior colorimetric sensing sensitivity towards S even after 30 d. The EHL@AgNPRs exhibited remarkable selectivity towards S with a minimum detection limit of 41.3 nM. The conjugation of lignin with AgNPRs offers a highly promising approach for the rapid detection of S in natural aquatic environments and for the valorization of lignin.
在生活和工业废水中，硫化物的广泛存在导致了环境污染，并对人类健康构成了威胁。因此，开发高选择性、高灵敏度、快速的硫离子（S）检测探针对于水生生态系统至关重要。在本研究中，采用种子生长和自组装的方法制备了木质素稳定的银纳米棒（EHL@AgNPRs）。在此基础上，提出了一种新型的、高性能的、环保的 S 比色检测方法。木质素通过阳离子-π 和静电相互作用包覆在 AgNPRs 的表面，作为一种优良的分散剂和稳定剂，防止聚集和形状变形。这使得 AgNPRs 能够保持局域表面等离子体共振（LSPR）特性，并且对 S 具有优越的比色传感灵敏度，即使在 30 天后也是如此。EHL@AgNPRs 对 S 具有显著的选择性，其最低检测限为 41.3 nM。木质素与 AgNPRs 的结合为快速检测天然水生态环境中的 S 以及木质素的利用提供了一种很有前途的方法。
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