Ex_g-C3N4 as a novel fluorescent probe for sensitive detecting ClO- in water samples with portable test strip.
Ex_g-C3N4 as a novel fluorescent probe for sensitive detecting ClO- in water samples with portable test strip.
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DOI：
10.1016/j.aca.2022.340715
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发表时间：
2023-01
影响因子：
6.2
通讯作者：
Yi Yuan;Jun Yan;Jianfei Liu;Yaru Wang;Yunlin Chen
中科院分区：
文献类型：
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作者：
Yi Yuan;Jun Yan;Jianfei Liu;Yaru Wang;Yunlin Chen
过量的次氯酸盐（ClO−）极易在水中形成残留物，严重危害人体健康并污染环境。因此，有必要开发一种灵敏的荧光传感器来检测水中的ClO−。本文采用高度剥落的石墨样氮化碳（Ex_g-C3N4）设计了一种简单、经济的ClO -荧光探针。结果表明，ex_g - c3n4对ClO−具有明显的荧光猝灭作用，具有较高的选择性和抗干扰能力，可用于制备水中ClO−检测探针。传感实验表明，ex_g - c3n4探针在水中的检测限为5.56 nM，检测范围为0 ~ 62 mM。此外，ex_g - c3n4的快速响应时间小于30 s，表明其具有优越的灵敏度。此外，在各种液体条件下进行了荧光传感实验，证明了ex_g - c3n4探针在自然环境下具有出色的检测应用。研制了一种便携式快速检测氯离子荧光试纸条。测试条上探针对ClO−的响应，检测限为0.1 μM，满足自来水中ClO−的安全要求。并对ex_g - c3n4探针的淬火机理进行了探讨。
Excessive hypochlorite (ClO−) is easy to form residues in water, which will seriously endanger human health and environmental pollution. Therefore, it is essential to develop a sensitive fluorescent sensor to detect ClO−in water. Herein, a simple and economical fluorescent probe for the detection of ClO−was designed by highly exfoliated graphite-like carbon nitride (Ex_g-C3N4). The results showed that Ex_g-C3N4had obvious fluorescence quenching effect on ClO−with high selectivity and anti-interference ability, which was feasible for making probes for detecting ClO−in water. Sensing experiments showed that the Ex_g-C3N4probe had the detection limit of 5.56 nM while the detection range was 0–62 mM in water. Moreover, the fast response time of Ex_g-C3N4was less than 30 s, illustrating the superior sensitivity. Besides, the fluorescence sensing experiment was carried out in various liquid conditions, which demonstrated that Ex_g-C3N4probe had outstanding detecting application in natural environment. A portable fluorescent test strip for rapid detecting ClO−was successfully developed. The response of the probe on test strip towards ClO−was investigated, and the detection limit (0.1 μM) is low enough to meet the safety requirements in tap water. Furthermore, the quenching mechanism of Ex_g-C3N4probe was also discussed.