Application of Pd/Graphene Modified Electrode in the Detection of 4-Chlorophenol

Authors

Peng SHI, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China;
Bo-xuan WANG, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China;
Quan-lin SONG, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China;
Hui WANG, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China;Follow
Xin LIU, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China;
Zhao-yong BIAN, College of Water Sciences, Beijing Normal University, Beijing 100875, China;

Corresponding Author

Hui WANG(wanghui@bjfu.edu.cn)

Abstract

The Pd/graphene composites were synthesized by a modified Hummers method and NaBH4 reduction process, and then were characterized using XRD, SEM, XPS, and TEM. The Pd/graphene modified glassy carbon electrode (Pd/graphene/GCE) was prepared based on this method. Cyclic voltammetry was used to study the optimum operation conditions for the 4-chlorophenol detection. It was shown that the surface of the graphene was smooth and Pd nanoparticles were uniformly dispersed on graphene. The average particle size was calculated to be 6.5 ± 0.05 nm. These nanoparticles exhibited high catalytic activity and sensitivity toward chlorophenols. PBS with a concentration of 0.1 mol?L-1 at pH 6.8 was the best supporting electrolyte for the detection of 4-chlorophenol. Peak current and the square root of the scan rate were in a good linear relationship (R2 = 0.992). Using the Pd/graphene/GCE analytical performance with the linear range from 1 to 100 μmol?L-1 (R2 = 0.967), a detection limit of 0.57 μmol?L-1 was obtained. The Pd/graphene/GCE had a good reproducibility and stability. Therefore, the Pd/graphene/GCE showed a high catalytic activity, which provides a simple, quick and reproducible method for the detection of 4-chlorophenol.

Graphical Abstract

Keywords

electrochemical detection, chlorophenol, Pd/graphene, modified electrode

DOI Link

https://doi.org/10.13208/j.electrochem.150603

Publication Date

2015-10-28

Online Available Date

2015-10-28

Recommended Citation

Peng SHI, Bo-xuan WANG, Quan-lin SONG, Hui WANG, Xin LIU, Zhao-yong BIAN. Application of Pd/Graphene Modified Electrode in the Detection of 4-Chlorophenol[J]. Journal of Electrochemistry, 2015 , 21(5): 488-495.
DOI: 10.13208/j.electrochem.150603
Available at: https://jelectrochem.xmu.edu.cn/journal/vol21/iss5/13

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