荧光
丙酮
溶剂
金属有机骨架
材料科学
乙腈
检出限
纳米尺度
有机溶剂
总有机碳
自来水
碳纤维
纳米技术
化学
光化学
化学工程
复合数
环境化学
色谱法
有机化学
环境科学
环境工程
复合材料
吸附
工程类
物理
量子力学
作者
Theanchai Wiwasuku,Jitti Suebphanpho,Somlak Ittisanronnachai,Vinich Promarak,Jaursup Boonmak,Sujittra Youngme
出处
期刊:RSC Advances
[The Royal Society of Chemistry]
日期:2023-01-01
卷期号:13 (26): 18138-18144
被引量:2
摘要
An easy-to-use, highly selective, and real-time organic solvent quality assessment is desirable to detect water contamination in organic solvents. Herein, a one-step procedure using ultrasound irradiation was used for encapsulating nanoscale carbon dots (CDs) into metal-organic framework-199 (HKUST-1) to form CDs@HKUST-1 composite. The CDs@HKUST-1 exhibited very weak fluorescence due to photo-induced electron transfer (PET) from the CDs to the Cu2+ centers, acting as a fluorescent sensor in its off-state. The designed material can detect and discriminate water from other organic solvents, driven by turn-on fluorescence. This highly sensitive sensing platform could be applied for the detection of water in ethanol, acetonitrile, and acetone with wide linear detection ranges of 0-70% v/v, 2-12% v/v, and 10-50% v/v and limits of detection of 0.70% v/v, 0.59% v/v, and 1.08% v/v, respectively. The detection mechanism is attributed to the interruption of the PET process due to the release of fluorescent CDs after treatment with water. A smartphone-based quantitative test was successfully developed to monitor the water content in organic solvents utilizing CDs@HKUST-1 and a phone color processing application, thus making it possible to develop an on-site, real time and easy-to-use sensor for water detection.
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