Jump to main content
Jump to site search

Issue 15, 2018
Previous Article Next Article

A PPy/Cu2O molecularly imprinted composite film-based visible light-responsive photoelectrochemical sensor for microcystin-LR

Author affiliations

Abstract

In this study, a visible light-responsive photoelectrochemical (PEC) sensor based on a PPy/Cu2O molecularly imprinted composite film for microcystin-LR (MC-LR) has been fabricated. Uniform Cu2O nanoparticles were electrodeposited on a pretreated indium-doped tin oxide-coated glass (ITO) by carefully controlling the deposition process and used as a photocatalyst to produce photocurrent under visible light. Subsequently, molecularly imprinted polypyrrole (PPy) was modified on the surface of the Cu2O/ITO electrode by an electropolymerization process, which created a certain amount of special recognition sites to enhance the selectivity of the electrode to MC-LR. PEC molecular imprinting sensors were used to rapidly analyze MC-LR concentration by determining changes in photocurrent density. The results showed that the change of photocurrent density was linearly proportional to the logarithm of the MC-LR concentration over the ranges from 1.0 ng L−1 to 100 ng L−1 and from 100 ng L−1 to 10.0 μg L−1 with a low detection limit of 0.23 ng L−1 (S/N = 3). Moreover, the PEC sensors exhibited specific selectivity to MC-LR when exposed to certain concentrations of interfering solutions. The constructed PEC sensors demonstrated good applicability in local water systems; this suggested that this promising application of integrating PEC and molecular imprinting technology could be applied to detect other contaminants of emerging concern.

Graphical abstract: A PPy/Cu2O molecularly imprinted composite film-based visible light-responsive photoelectrochemical sensor for microcystin-LR

Back to tab navigation

Supplementary files

Publication details

The article was received on 14 Dec 2017, accepted on 01 Mar 2018 and first published on 02 Mar 2018


Article type: Paper
DOI: 10.1039/C7TC05743A
Citation: J. Mater. Chem. C, 2018,6, 3937-3944
  •   Request permissions

    A PPy/Cu2O molecularly imprinted composite film-based visible light-responsive photoelectrochemical sensor for microcystin-LR

    J. Chen, P. Gao, H. Wang, L. Han, Y. Zhang, P. Wang and N. Jia, J. Mater. Chem. C, 2018, 6, 3937
    DOI: 10.1039/C7TC05743A

Search articles by author

Spotlight

Advertisements