Publication Date:
2018
Description:
〈p〉Publication date: 15 February 2019〈/p〉
〈p〉〈b〉Source:〈/b〉 Sensors and Actuators B: Chemical, Volume 281〈/p〉
〈p〉Author(s): Xiaoxi Yuan, Nan Gao, Xuan Gao, Dongchao Qiu, Rui Xu, Zhaolong Sun, Zhigang Jiang, Junsong Liu, Hongdong Li〈/p〉
〈h5〉Abstract〈/h5〉
〈div〉〈p〉In this paper, a nanopyramid boron-doped diamond (BDD) electrode is prepared by hydrogen-plasma treating conventional chemical vapor deposition BDD films. The nanopyramid grains are formed by a vaporization and secondary nucleation on BDD surface to test the trace level of an environmental hormone pollutant of 4-nonylphenol (4-NP). Voltammetry of 4-NP investigated on this electrode reveals the irreversible, adsorption-controlled, one-electron-and-one-proton involved oxidation process. The oxidation peak current is significantly evident even at low concentration of 4-NP (in the region of 1–100 nM) and the detection limit can be realized as low as 0.26 nM, which is lower than most previous reports. It is attributed to the more reaction sites provided by the high dense nanopyramids on the BDD surface and the hydrogen-terminated surface. Moreover, the electrode is reusable for the physical adsorption between 4-NP molecule and nanopyramid BDD. Taking into considering the unique properties of BDD, the corresponding electrodes show stability and specificity for detecting trace 4-NP molecules.〈/p〉〈/div〉
Print ISSN:
0925-4005
Electronic ISSN:
1873-3077
Topics:
Chemistry and Pharmacology
,
Electrical Engineering, Measurement and Control Technology
