Uppresses the recombination of Bi2O2CO3 b , and hence enhancing
Uppresses the recombination of Bi2O2CO3 b , and therefore enhancing the photocatalytic efficiency [51]. S2 photogenerated e S2 S4 The photocurrent of pure Bi2 O2 CO3 , S2 and S4 (pure BiOI) samples S4 shown in are -7 2.0×10 Figure 8b. The photocurrent density generated by the S2 sample is obviously greater than that of pure Bi2 O2 CO3 and BiOI. Thus, the PL and photocurrent measurements all demonstrate that the 1D/2D Bi2 O2 CO3 iOI heterostructure can significantly market the -7 1.0×10 separation and transfer of photogenerated electron ole pairs. So that you can get the relative positions of the conduction band (CB) and valence band (VB) edges, VB-XPS of Bi2 O2 CO3 and S4 (pure BiOI) had been characterized (Figure 9). The 0.0 EVB major of Bi2 O2 CO3 and S4 locate at 1.78 and 1.15 eV, respectively. Around the basis in the VB 500 550 600 650 700 90 Pinacidil Protocol position and their band gaps, the CB edge potentials of120 two OTime(s) BiOI are estimated Bi 150 3 180 210 240 two CO and Wavelength(nm) to become -1.18 and -0.six eV, respectively by way of the equation ECB = EVB .Existing density(A.cm )-Figure 8. The space temperature PL spectra (ex = 320 nm) (a) and photocurrent spectra (b) of Bi2O2CO3, S2 and S4 samples.Catalysts 2021, 11,3 samples, which implies 1D/2D heterostructure correctly suppresses the recombination of photogenerated e , and as a result enhancing the photocatalytic performance [51]. The photocurrent of pure Bi2O2CO3, S2 and S4 (pure BiOI) samples are shown in Figure 8b. The photocurrent density generated by the S2 sample is naturally greater than that of pure Bi2O2CO3 and BiOI. Hence, the PL and photocurrent measurements all demon-12 8 of strate that the 1D/2D Bi2O2CO3 iOI heterostructure can substantially market the separation and transfer of photogenerated electron ole pairs.Bi2O2CO3 S2 SCurrent density(A.cm )aIntensity(a.u.)-3.0x-bBi2O2CO3 S2 S2.0x-1.0x-0.0 90Catalysts 2021, 11, x FOR PEER REVIEWWavelength(nm)Time(s)9 ofFigure 8. The room temperature PL spectra (ex = 320 nm) (a) and photocurrent spectra (b) of Bi2 O2 CO3 , S2 and S4 samples. Figure 8. The area temperature PL spectra (ex = 320 nm) (a) and photocurrent spectra (b) of Bi2O2CO3, S2 and S4 samples.Intensity(a.u.)In an effort to get the relative positions on the conduction band (CB) and valence band Bi2O2CO3 (VB) edges, VB-XPS of Bi2O2CO3 and S4 (pure BiOI) have been characterized (Figure 9). The EVB best of Bi2O2CO3 and S4 find at 1.78 and 1.15 eV, respectively. OnS4 basis on the VB the position and their band gaps, the CB edge potentials of Bi2O2CO3 and BiOI are estimated to become -1.18 and -0.6 eV, respectively via the equation ECB = EVB.1.15eV01.78eVBanding Power(eV)Figure 9. The VB-XPS spectra of Bi2O22 CO3and S4 (pure BiOI). The VB-XPS spectra of Bi2 O CO3 and S4 (pure BiOI).Schematic diagram for power band Bi O two O2 3 iOI, the the formation of your p Schematic diagram for power band of of 2Bi2COCO3 iOI, formation of the p juncjunction the possible charge separation is AZD4625 Autophagy displayed in Figure10. We knowknowp-n junction and along with the attainable charge separation is displayed in Figure ten. We that that p-n junctions is often formed among (Figure 10b), The internal electric field Bi Bi 2CO3 iOI ptions is often formed between (Figure 10b), The internal electric field of of 2O2 O2 CO3 iOI p-n heterojunction promotes the migration price of photogenerated electrons and holes, n heterojunction promotes the migration price of photogenerated electrons and holes, which tremendously improves the photocatalytic ac.