Direct and sensitive detection of sulfide ions based on one-step synthesis of ionic liquid functionalized fluorescent carbon nanoribbons |
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| Authors: | Tao Luo Xiaobo Wang Yuting Qian Junjie Liu Lequn Li Jiyang Liu Jie Chen |
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| Institution: | Affiliated Tumor Hospital of Guangxi Medical University, 71 Hedi Road, Nanning 530021 PR China.; Department of Chemistry, Zhejiang Sci-Tech University, 928 Second Avenue, Xiasha Higher Education Zone, Hangzhou 310018 PR China, |
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| Abstract: | Despite widely reported fluorescence sensors for cations, direct detection of anions is nevertheless still rare. In this work, ionic liquid-functionalized fluorescent carbon nanoribbons (IL-CNRs) are one-step synthesized and serve as the fluorescent probes for direct and sensitive detection of sulfide ions (S2−). The IL-CNRs are synthesized based on electrochemical exfoliation of graphite rods in a water-IL biphasic system. The as-prepared IL-CNRs exhibit uniform structure, high crystallinity, strong blue fluorescence (absolute photoluminescence quantum yield of 11.4%), and unique selectivity towards S2−. Based on the fluorescence quenching of IL-CNRs by S2−, a fluorescence sensor is developed for direct, rapid and sensitive detection of S2− in the range of 100 nM to 1 μM and 1–300 μM with a low detection limit (LOD, 85 nM). Moreover, detection of S2− in a real sample (tap water) is also demonstrated.Sensitive detection of sulfide ions is realized based on one-step synthesis of ionic liquid functionalized fluorescent carbon nanoribbons. |
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