GQDs/W18O49/tetragonal WO3 loaded on CN1-x to construct heterostructures for improving electrochemical performance

In this study, the prepared GQDs/W18O49/WO3 (WCW) were loaded on g-C3N4 with defects (CN1-x) under the action of hydrothermal synthesis. The structure, morphology, optical properties, functional groups and surface group properties of the CN1-x@WCW composites were determined by XRD, TEM, UV-vis, FTIR and XPS tests. The electrochemical properties of the CN1-x@WCW composite were studied by i-t, EIS and M -S analysis. Compared with WCW, the instantaneous photoelectric efficiency, the photon current efficiency under the applied bias voltage, interfacial electron transfer and electron lifetime of CN1-x@WCW had been greatly improved. The results indicated that two-dimensional CN1-x with good conductivity could transfer electrons quickly, reduce the interfacial resistance and prolong the lifetime of electrons, thus inhibiting the recombination of photogenerated electron-hole pairs in WCW semiconductor. In addition, the possible mechanism was proposed and analyzed from the point of view of electron transmission.

Automated summary

In this study, GQDs/W18O49/WO3 (WCW) were loaded on g-C3N4 with defects (CN1-x) using hydrothermal synthesis. The CN1-x@WCW composites exhibited improved photoelectric efficiency, interfacial electron transfer, and electron lifetime compared to WCW.