期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 808, 期 -, 页码 245-251出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2017.12.019
关键词
Nickel oxide/carbon nanotube nanocomposites; Atomic layer deposition; Electrochemical detection; Hydroquinone; Catechol
资金
- National Natural Science Foundation of China [21475071, 21275151, 21777150]
- Taishan Scholar Program of Shandong Province [ts201511027]
- Shandong Provincial Natural Science Foundation of China [ZR2016JL007]
- Qingdao Municipal Science and Technology Bureau [16-5-1-44-jch]
- Technology Planning Projects of Guangdong Province of China [2015A020218001, 2016A040403061]
The fabrication of nickel oxide/carbon nanotube (NiO/CNT) nanocomposites by atomic layer deposition (ALD) and their electrochemical performances for sensing hydroquinone (HQ) and catechol (CC) were investigated. NiO nanopaticles with a size of similar to 4.9 nm formed by ALD were highly dispersed on the wall of pristine CNT. Then, the prepared NiO/CNT nanocomposites were used to modify glassy carbon electrode (NiO/CNT/GCE) for electrochemical detection, which presented enhanced electrochemical performances towards detecting HQ and CC. Not only were the redox peak currents of HQ and CC greatly enhanced, but also the oxidization peaks of the both phenolic isomers could be well separated. Under the optimized conditions, the current responses are linear for HQ and CC in the range of 10-500 mu M and 10-400 mu M, with detection limit of 2.5 mu M (S/N = 3) for both compounds.
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