A highly sensitive perovskite oxide sensor for detection of p-phenylenediamine in hair dyes

He J 1 , Sunarso J 2 , Miao J 1 , Sun H 1 , Dai J 1 , Zhang C 1 Show all authors , Zhou W 3 , Shao Z 4

Affiliations 

  • 1 State Key Laboratory of Materials-Oriented Chemical Engineering, college of Chemical Engineering, Nanjing Tech University, Nanjing 210009, PR China
  • 2 Research Centre for Sustainable Technologies, Faculty of Engineering, Computing and Science, Swinburne University of Technology, Jalan Simpang Tiga, 93350 Kuching, Sarawak, Malaysia
  • 3 State Key Laboratory of Materials-Oriented Chemical Engineering, college of Chemical Engineering, Nanjing Tech University, Nanjing 210009, PR China. Electronic address: zhouwei1982@njtech.edu.cn
  • 4 State Key Laboratory of Materials-Oriented Chemical Engineering, college of Chemical Engineering, Nanjing Tech University, Nanjing 210009, PR China; Department of Chemical Engineering, Curtin University, Perth, Western Australia 6845, Australia. Electronic address: shaozp@njtech.edu.cn
J Hazard Mater, 2019 05 05;369:699-706.
PMID: 30831522 DOI: 10.1016/j.jhazmat.2019.02.070

Abstract

Effective regulation of p-phenylenediamine (PPD), a widely used precursor of hair dye that is harmful to human health in large concentration, relies upon an accurate yet simple detection of PPD. In this context, amperometric electrode sensor based on perovskite oxide becomes attractive given its portability, low cost, high sensitivity, and rapid processing time. This work reports the systematic characterization of a series of Sr-doped PrCoO3-δ perovskite oxides with composition of Pr1-xSrxCoO3-δ(x = 0, 0.2, 0.4, 0.6, 0.8, and 1) for PPD detection in an alkaline solution. PSC82 deposited onto glassy carbon electrode (PSC82/GCE) generates the highest redox currents which correlates with the highest hydrogen peroxide intermediates (HO2-) yield and the σ*-orbital (eg) filling of Co that is closest to unity for PSC82. PSC82/GCE provides the highest sensitivities of 655 and 308 μA mM-1 cm-2 in PPD concentration range of 0.5-2,900 and 2,900-10,400 μM, respectively, with a limit of detection of 0.17 μM. PSC82/GCE additionally demonstrates high selectivity to PPD and long term stability during 50 consecutive cyclic voltammetry scans and over 1-month storage period. The potential applicability of PSC82/GCE was also demonstrated by confirming the presence of very low concentration of PPD of below 0.5% in real hair dyes.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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