Anodic near-infrared electrochemiluminescence from CdTe/CdS core(small)/shell(thick) quantum dots and their sensing ability of Cu2+
Anodic near-infrared electrochemiluminescence from CdTe/CdS core(small)/shell(thick) quantum dots and their sensing ability of Cu2+
复制标题
CdTe/CdS 核（小）/壳（厚）量子点的阳极近红外电化学发光及其对 Cu2+ 的传感能力
DOI：
10.1016/j.snb.2014.10.112
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Jiang Xiaochun
中科院分区：
文献类型：
--
作者：
Wang Jing;Jiang Xiaochun
Anodic near-infrared electrochemiluminescence (NECL) from 3-mercaptopropionic acid (MPA)-capped CdTe/CdS coresmall/shellthickquantum dots (QDs) without any co-reactants were studied in aqueous solution for the first time. A stable and intensive anodic NECL emission at +1.32 V with an onset potential of +0.84 V was observed in pH 7.4 PBS at an indium tin oxide electrode, which results from the annihilation process between the oxidation products of QDs and the produced QDs anions. Various influencing factors, such as pH, electrolyte, scan rates and electrode materials on the NECL were investigated. Based on the selective quenching by Cu2+to the NECL emission from the QDs, a simple and sensitive method for the determination of Cu2+was developed. Moreover, as a practical application, the proposed method was used to monitor Cu2+level in lake water and milk with satisfactory results obtained.
