Photocatalytic performance and mechanism of hydrogen evolution from water over ZnCdS/Co@CoO in sacrificial agent-free system

ZnCdS/CoMoOS Photocatalyst with High Electron Flux at the Ternary Interface Enhances H2 production

“…However, in the gradients of ZnCdS (Figures a and S3), when different dosages of CoMoOS are introduced, although the positions of the characteristic peaks remain almost unchanged, the peaks weaken as more CoMoOS is added, suggesting that excessive CoMoOS might impede hydrogen evolution (still in minor amounts relative to ZnCdS). , Further chemical structural characterization of all samples was achieved by using FT-IR spectroscopy. As depicted in Figure b, a broad peak at 3436 cm –1 and a narrow peak at 1620 cm –1 were detected in all samples, corresponding to O–H stretching vibrations. Besides, two peaks at 1099 and 620 cm –1 are ascribed to the respiration modes of CoMoOS: the 1099 cm –1 peak attributed to the presence of metal thiourea complex; the 620 cm –1 peak assigned to Co, Mo–S vibrations, thereby confirming the successful synthesis of CoMoOS.…”

“…30,31 Further chemical structural characterization of all samples was achieved by using FT-IR spectroscopy. As depicted in Figure 3b, a broad peak at 3436 cm −1 and a narrow peak at 1620 cm −1 were detected in all samples, 32 corresponding to O−H stretching vibrations. Besides, two peaks at 1099 and 620 cm −1 are ascribed to the respiration modes of CoMoOS: the 1099 cm −1 peak attributed to the presence of metal thiourea complex; the 620 cm −1 peak assigned to Co, Mo−S vibrations, 33 thereby confirming the successful synthesis of CoMoOS.…”

Photodeposited nickel-loaded ZnCdS nanoparticles for hydrogen production from photocatalytic water splitting

“…The energy bands of different samples were obtained by plotting αhν 2 as a function of photon energy ( hν ) (where α , h , ν and 2 are the absorption coefficient, Planck constant, frequency and transition type of semiconductor, respectively). 30 Finally, the E g value of the catalyst can be obtained from the tangent line of the curve (Fig. 5b), and the E g value of ZnCdS(TS)/Ni-0.5H, ZnCdS(TS)/Ni-1H, ZnCdS(TS)/Ni-2H, ZnCdS(TS)/Ni-3H and ZnCdS(TS)/Ni-4H composites is 2.402 eV, 2.460 eV, 2.456 eV, 2.416 eV and 2.462 eV, respectively.…”

Construction of CoS/Cd0.5Zn0.5S ohmic heterojunctions for improving photocatalytic hydrogen production activity

“…6d and Table S2, ESI †). 2,[52][53][54][55][56][57][58][59][60][61][62] The stability of a photocatalyst is vital for a catalytic reaction. Therefore, the cycling stability of the 30%-CoS/Cd 0.5 Zn 0.5 S nanocomposite was measured every three hours as one cycle and the results are shown in Fig.…”