Fig. 3: Optical spectroscopy and photoelectrical properties of ultrathin PBOC layers and bulk PBCOC. | Nature Communications

Fig. 3: Optical spectroscopy and photoelectrical properties of ultrathin PBOC layers and bulk PBCOC.

From: Unlocking bimetallic active sites via a desalination strategy for photocatalytic reduction of atmospheric carbon dioxide

Fig. 3

a UV–vis diffuse reflectance spectra. Inset: corresponding optical images and obtained bandgaps of 2.82 and 3.14 eV, estimated by plotting (αhν)2 versus hν. α and ν are the absorbance and wavenumber; h is the Planck constant. b Mott−Schottky plots. c Schematic illustration of the electronic band structures; grey arrows represent the electron transition process under the light irradiation. CB, conduction band; VB, valence band. d Electrochemical impendence spectroscopy. e Transient photocurrent densities with light on/off cycles under full spectrum in 0.1 M Na2SO4 electrolyte solution at an applied potential of 0.5 V vs. Ag/AgCl electrode. f Time-resolved fluorescence spectra. Ave. τ is the average fluorescence lifetime.

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