Selective and sensitive visible-light-prompt photoelectrochemical sensor of paracetamol based on Bi₂WO₆ modified with Bi and copper sulfide.

ABSTRACT: Paracetamol (PA) is a ubiquitous non-steroidal anti-inflammatory drug, mainly used to treat headaches, arthritis and osteoarthritis and other diseases. In this work, a novel label free photoelectrochemical (PEC) sensor based on Bi-CuS/Bi₂WO₆ has been developed for the detection of PA, which was fabricated by a simple two-step hydrothermal process. It was found that Bi-CuS/Bi₂WO₆ with a CuS/Bi₂WO₆ heterojunction and surface plasmon resonance (SPR) effect of Bi possesses enhanced charge transfer and absorption wavelengths under visible light, particularly when compared to pristine Bi₂WO₆ films, thus producing an increase in the observed photocurrent. The photocurrent was increased after adding PA. And the photocurrent increment was linear with PA concentration in the range from 0.01-60 μM with a detection limit of 2.12 nM. Moreover, the PEC sensor also exhibited high anti-interference property and acceptable stability. In the present study, a Bi-CuS/Bi₂WO₆ photoelectrode is considered a promising candidate for carrying out PEC analysis.

SUBMITTER: Li Y 

PROVIDER: S-EPMC8693892 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature