A highly selective photoelectrochemical sensor based on click chemistry for copper (II) determination
| Autor: | Qi-Zhong Zhou, Jian-Long Chen, Wen-Yuan Tang, Deman Han, Wenping Jia, Lu-Yi Jiang |
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| Rok vydání: | 2016 |
| Předmět: |
Photocurrent
Detection limit General Chemical Engineering Inorganic chemistry chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry Ascorbic acid 01 natural sciences Copper Cycloaddition 0104 chemical sciences Analytical Chemistry Catalysis chemistry Electrode Electrochemistry Click chemistry 0210 nano-technology |
| Zdroj: | Journal of Electroanalytical Chemistry. 778:148-151 |
| ISSN: | 1572-6657 |
| DOI: | 10.1016/j.jelechem.2015.10.034 |
| Popis: | A highly selective photoelectrochemical sensor was fabricated for the detection of Cu 2 + ions based on the Cu + catalyzed click reaction. Firstly, 11-Azido-3,6,9-trioxaundecan-1-amine was immobilized on the CdS modified ITO electrode by classic 1-Ethyl-3-[3-dimethylaminopropyl]carbodiimide reaction, then the propargyl-functionalized Au NPs were binding to electrode through the cycloaddition reaction between azides and alkynes, which catalyzed by Cu + (acquired from the reduction of Cu 2 + by ascorbic acid), making the Au NPs close to the CdS QDs. Upon light irradiation, energy transfer between the CdS QDs and Au NPs would lead to the decrease of photocurrent. Under optimized condition, the percentage of photocurrent decrement was linearly proportional to the concentration of Cu 2 + ions, ranging from 1.0 × 10 − 9 to 1.0 × 10 − 6 M, with a detection limit of 2.0 × 10 − 10 M, the novel strategy could provide a sensitive and selective platform for Cu 2 + detection. |
| Databáze: | OpenAIRE |
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