Enhancing visible-light-enhanced photoelectrochemical activity of BiOI microspheres for 4-chlorophenol detection by promoting with Bi surface plasmon resonance (SPR) and multi-walled carbon nanotubes

This work interprets Bi surface plasmon resonance (SPR) and Multi-walled carbon nanotubes, which promote BiOI microspheres (MWCNT/Bi-BiOI) and put into synthesis in virtue of one-stage solvothermal method. The measurement of the combination structure with morphology is achieved in virtue of a range of physical characteristics. Moreover, as the photoelectrochemical (PEC) tests indicate, MWCNT/Bi-BiOI features higher PEC properties compared to those of pure BiOI for the reason of the active SPR influence of Bi nanoparticles as well as the excellent electrical conductivity of MWCNT. Besides, MWCNT/Bi-BiOI is characterized by superior absorption of visible light together with a lower-electron recombination ratio. Thereby, MWCNT/Bi-BiOI-based PEC sensors have been made up to detect 4-chlorophenol (4-CP). They display wide linear within the range of 1–12,800 ng mL−1, based on the high sensing 4-CP stability. As a result, the PEC sensor harbors an excellent potential application in the detection of 4-CP.