荧光碳量子点对印染废水中锑离子的快速检测

Rapid detection of antimony ions in dyeing wastewater by fluorescent carbon quantum dots

针对印染废水中锑的污染问题,利用Sb^(3+)与Sb^(5+)对碳量子点的荧光猝灭机制,建立了氮掺杂荧光碳量子点纳米探针对印染废水中锑离子的快速检测方法.以一步水热法合成了氮掺杂荧光碳量子点,以碳量子点荧光猝灭程度检测锑离子浓度.结果表明:锑离子检出限为3.71μg/L,线性范围为10~80μg/L,加标回收率为90.07%~111.26%,相对标准偏差为0.22%~4.88%;所提方法具有经济、快速、灵敏的优点,适合锑离子的现场快速检测.

Aiming at the pollution of antimony in dyeing wastewater,by using the fluorescence quenching effect of Sb^(3+)and Sb^(5+)on carbon quantum dots,a rapid detection method of nitrogen-doped fluorescent carbon quantum dot nanoprobes for antimony ions in dyeing wastewater was established.The nitrogen-doped fluorescent carbon quantum dots were synthesized by a one-step hydrothermal method.The antimony ion concentration was detected by the fluorescent quenching degree of carbon quantum dots.The results show that the detection limit of antimony ions is 3.71μg/L,and the linear range is from 10μg/L to 80μg/L.The index recovery ranges from 90.07%to 111.26%,and the relative standard deviation(RSD)is in the range from 0.22%to 4.88%.The as-proposed method is economical,rapid,sensitive,and it is suitable for rapid on-site detection of antimony ions.