n–n ZnO–Ag₂CrO₄ heterojunction photoelectrodes with enhanced visible-light photoelectrochemical properties

Abstract

ZnO NRs hydrothermally grown on Au coated glass substrate, followed by deposition of Ag2CrO4 particles via SILAR route. The content of the Ag2CrO4 particles on the ZnO NRs were controlled by changing the number of SILAR cycles.

Solar-Driven Photoelectrochemical Performance of Novel ZnO/Ag2WO4/AgBr Nanorods-Based Photoelectrodes

“…The ZnO/Ag 2 WO 4 NRs photoelectrode was prepared using SILAR method in the same way as our previous work [ 24 , 25 ]. An anionic and cationic aqueous precursor solutions were prepared separately using 0.1 M of silver nitrate Ag (NO) 3 and 0.1 M of sodium tungstate (Na 2 WO 4 .2H 2 O).…”

Synthesis and Characterization of Some Nanostructured Materials for Visible Light-driven Photo Processes

“…A clean conductive substrate such as Au coated glass or florin tin oxide (FTO) were used to grow ZnO nanorods (NRs) as described in our previous publications [63,67] throw the following steps:…”

“…Silver chromate Ag2CrO4 nanoparticles were deposited over the above prepared ZnO NRs photoelectrode using successive ionic layer adsorption and reaction (SILAR) method followed by annealing process [63].…”

“…The structural properties of the ZnO/Ag/Ag2WO4 were investigated by XRD and the result is shown in ZnO/Ag/Ag2WO4, respectively. Which suggested to be due to the extended absorption region of the light and to the SPR effect of silver particles which enhances the electrons transfer between the ZnO and Ag2WO4 during the redox reactions for H2 and O2 evaluation [63,97].…”

“…ZnO). Whereas, the strongly reductive catalysts have a high CB level suitable for CO2 reduction reaction and H2 evaluation reaction[64].However, the CB and VB edge potentials of a semiconductor at zero point charge can be calculated using the electronegativity theory[63,69,70]:…”