PDF(Pubmed)
Abstract：
The extensive utilization of bismuth and its derivatives in many industries, such as chemical, semiconductor, pharmaceutical, and cosmetics, leads to their accumulation in wastewater, posing a risk to both human health and the environment. Carbon nanorods (CNR) are fluorescent nanoparticles with an ability to detect various analytes as sensing probes. This study focuses on the production, structure, and chemical composition characterization of silkworm-derived CNR (swCNR) and their ability to detect bismuth ions (Bi3+) and inhibit radicals. The optimum wavelength for exciting the fluorescence of swCNR was 370 nm, and the resulting emission peak was observed at 436 nm. The prepared swCNR showed static fluorescence quenching mechanism-based sensing of Bi3+ ions with a limit of detection of 175 nM and two linear ranges from 0.5 to 5 μM (R2 = 0.9997) and 10-50 μM (R2 = 0.9995). The swCNR demonstrated high selectivity in detecting Bi3+ ions in the spiked river water samples, thus establishing the swCNR\'s role as a nano fluorescence probe designed for the selective detection of Bi3+ ions among other metal ions. Favorable results for the antiradical ability of swCNR were obtained against hydroxyl, 2,2 diphenyl-1 picrylhydrazyl, and 2,2\'-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) radicals with scavenging percentages of 15, 32, and 90, respectively. The possible applications of swCNR in the environmental and antioxidant sectors are proposed in this study.
摘要：
铋及其衍生物在许多工业中的广泛利用,如化学，半导体,Pharmaceutical,和化妆品，导致它们在废水中积累，对人类健康和环境都有风险。碳纳米棒(CNR)是具有检测各种分析物作为传感探针的能力的荧光纳米颗粒。这项研究的重点是生产，结构,和家蚕来源的CNR（swCNR）的化学成分表征及其检测铋离子（Bi3）和抑制自由基的能力。激发swCNR荧光的最佳波长为370nm，并且在436nm处观察到所得到的发射峰。制备的swCNR显示了基于静态荧光猝灭机制的Bi3离子传感，检测极限为175nM，两个线性范围为0.5至5μM（R2=0.9997）和10-50μM（R2=0.9995）。swCNR在检测加标河水样品中的Bi3离子方面表现出高选择性，从而确立了swCNR作为纳米荧光探针的作用，该探针设计用于选择性检测其他金属离子中的Bi3离子。获得了swCNR对羟基的抗自由基能力的良好结果，2,2二苯基-1吡喃基肼基，和2,2'-偶氮-双（3-乙基苯并噻唑啉-6-磺酸）自由基，清除百分比分别为15、32和90。本研究提出了swCNR在环境和抗氧化剂领域的可能应用。
