Abstract
Bi2WO6 (BW) was compounded with different contents of copper sulfide (CuS) by a two-step procedure. The chemical composition and morphology of the materials were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy. The results of photoelectrochemical (PEC) tests showed that CuS can improve the PEC performance of semiconductor materials and it has the best performance when the CuS mass fraction is 5%. Therefore, CuS/BW-5% nanocomposite has been constructed as ofloxacin (OFL) drug PEC aptasensors by binding of aptamer receptors. The PEC aptasensor based on CuS/BW-5% has a linear relationship for OFL of 1–12,000 nM and a determination limit of 0.35 nM. Since the photoelectron potential generated by CuS/BW-5% heterojunction reduces the combination of photogenerated electrons and holes CuS/BW-5% has a better photoelectrocatalytic performance.
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We acknowledge the financial support from the project supported by the Hubei Provincial Science and Technology Department for the general project (NO.2019CFB450).
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Huang, W., Cheng, Y., Fei, X. et al. Designing of CuS growing on Bi2WO6 nanosheet heterostructures based on a photoelectrochemical aptasensor for detecting ofloxacin. Microchim Acta 187, 583 (2020). https://doi.org/10.1007/s00604-020-04516-z
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DOI: https://doi.org/10.1007/s00604-020-04516-z