Abstract
In this study, two-dimensional (2-D) ZnIn2S4 nanosheet arrays (NSAs) have been prepared on the arbitrary substrates directly through a facile one-pot hydrothermal route. The effect of synthesis time, synthesis temperature and substrate type were investigated on the surface morphologies of the obtained ZnIn2S4 membranes. It was found that the optimal growth conditions were 200°C, 2 h and fluorine doped tin oxide (FTO) used as the substrate. Besides, the influence of growth time on the photoelectrochemical (PEC) properties of ZnIn2S4 was investigated. It was demonstrated that the best PEC performance was achieved in the 2 h sample (200°C, FTO substrates), which displayed a photocurrent density of ∼ 1.0 mA/cm2 versus reversible hydrogen electrode under a simulated solar irradiation (AM1.5G, with an intensity of 100 mA/cm2). The Mott–Schottky (M–S) plots indicated that the 2 h sample owned the highest donor density (ND) and the most positive flat-band potential (VFB), suggesting that the enhanced PEC performance might be resulting from a better n-type conductivity of the ZnIn2S4 electrode. Further, the PEC biosensors were fabricated by using a ZnIn2S4 photoanode for detection of the glutathione (GSH), leading to an excellent detect limit of 1500 mA cm−2 M−1 and sensitivity of 33 nM.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
