发光
量子产额
光致发光
荧光
水溶液
猝灭(荧光)
聚苯乙烯
材料科学
碳纤维
光化学
量子点
离子
化学工程
化学
纳米技术
有机化学
聚合物
光电子学
工程类
物理
复合材料
复合数
量子力学
作者
Vadivel Ramanan,Bommana Siddaiah,Kaviyarasan Raji,P. Ramamurthy
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2018-01-04
卷期号:6 (2): 1627-1638
被引量:121
标识
DOI:10.1021/acssuschemeng.7b02852
摘要
Synthesis of highly luminescent carbon dots (CDs) from waste materials gains much attention in the current scenario. We have converted waste expanded polystyrene (EPS), a nonbiodegradable environmental pollutant, into multifunctionalized fluorescent CDs. This can be a good scaling up approach for the large-scale synthesis of nitrogen-doped CDs with a high photoluminescence (PL) quantum yield (QY) of ∼20%. The as prepared CDs exhibit excellent water solubility and a longer PL lifetime (in nanoseconds). They also possess excellent photostability, low cytotoxicity, and stable luminescence QY in different solution environments. Selective and sensitive detection of Au3+ ions is demonstrated using these CDs as fluorescence probes, and a LOD of 53 nM is achieved. A detailed investigation revealed that the observed PL quenching is due to “coordination-induced aggregation caused PL quenching” mechanism.
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