Novel and Selective Photoelectrochemical Sensing of Levofloxacin Based on BiOI Microflower Spheres Modified with Bi-Metal and BiPO₄

Abstract

This paper reports the design of a photoelectrochemical (PEC) sensing method for detecting levofloxacin (LEVX) in tablets. In this paper, a three-dimensional plasma Bi/BiPO4/BiOI heterojunction was fabricated by a two-step method, in which Bi-metal and BiPO4 were fixed on the surface of BiOI with beads. The composites were characterized by a variety of analytical methods. Bi/BiPO4/BiOI-5% showed better photocatalytic activity than BiPO4/BiOI. Indium tin oxide (ITO) modified with the Bi/BiPO4/BiOI-5% composites was used to determine LEVX and achieved linear detection ranges of 0.2–2 [Formula: see text]M and 2–7 [Formula: see text]M. These composites present alternative materials for the analysis of antibiotics.

A novel “turn-off” photoelectrochemical aptasensing platform for selective detection of tobramycin based on the Ti3C2–MoS2/BiOI heterojunction

“…23 Therefore, to overcome this challenge, there have been proposals to apply technologies such as doping diverse metals, using metal oxides or generating heterojunctions with additional semiconductors. 24,25 Of those modification approaches, constructing heterojunctions with diverse semiconductors was actually shown to be efficient, and in this context, great attention has been paid to sulfide-based materials (CdS, CuS, MoS 2 and ZnS), because of the ease with which they absorb light as well as their narrow band gap. 26,27 In particular, MoS 2 has good photocatalytic performance due to the special sandwich layered structure of the S–Mo–S atoms, while at the same time, it is characterized by a narrow band gap, a large absorption coefficient and is easily prepared.…”