S-scheme heterojunction based on ZnS/CoMoO4 ball-and-rod composite photocatalyst to promote photocatalytic hydrogen production

MOF-Derived CoS2@NiS-MoS2 Ternary Composite Heterojunction Electrocatalyst for Efficient Water Splitting

“…17 The characteristic peak of NiMoO 4 was successfully indexed at 2θ = 33.81°(JCPDS 12-0348), 18 and the diffraction peaks at 2θ = 9.56°and 26.92°could be well assigned to the spinel CoMoO 4 phase (JCPDS 15-0439). 19 It was worth noting that when the molar ratios of Mo and Ni were different, there was no obvious difference in the Ti diffraction peaks of the prepared CoMoNi-LDH/Ti. However, it can be found that as the ratio of n Ni decreased, the intensity of diffraction peaks of Ni(OH) 2 and NiMoO 4 obviously decreased.…”

“…The obvious diffraction peak at 2θ = 59.04° was assigned to the (110) plane of Ni­(OH) 2 (JCPDS 14-0117) . The characteristic peak of NiMoO 4 was successfully indexed at 2θ = 33.81° (JCPDS 12-0348), and the diffraction peaks at 2θ = 9.56° and 26.92° could be well assigned to the spinel CoMoO 4 phase (JCPDS 15-0439) . It was worth noting that when the molar ratios of Mo and Ni were different, there was no obvious difference in the Ti diffraction peaks of the prepared CoMoNi-LDH/Ti.…”

CdS Nanorods and ZnCd-PBA Construct a Direct S-Scheme Heterojunction for Efficient Photocatalytic Hydrogen Evolution

“…As shown in Figure b, the curvature radius of the electrochemical impedance spectroscopy (EIS) curve reflects the difficulty of charge transfer at the interface of CdS, ZnCd-PBA, and CZC-15. The smaller the radius of the EIS arc, the easier it is for electrons to transfer and the better the separation effect between electrons and holes. , The fact that CZC-15 has the smallest radius of curvature in the EIS curve indicates that the photogenerated carriers of CZC-15 are easily transferred at the interface, and the electron and hole separation effect is good. The reason may be the construction of the S-scheme heterojunction between CdS and ZnCd-PBA, forming a new electron transfer channel and improving the separation of electrons and holes, , so that photogenerated electrons in CZC-15 can migrate more effectively to the active site, facilitating their participation in the hydrogen production reaction.…”

Amorphous bimetallic sulfide Co9S8/SnS2 used as a p–n heterojunction to achieve photocatalytic hydrogen evolution

“…11). Under the condition of visible light irradiation, EY is first excited to the unstable EY 1 * and then to the stable EY 3 *, the stable EY 3 * and the sacrificial agent TEOA undergo redox reaction into EY − , 44,45 the electrons of EY − are transferred to the conduction band of SnS 2 and Co 9 S 8 , H 2 O/H + undergo redox reaction to generate hydrogen, and EY − is converted to EY after losing electrons. Before the coupling of semiconductor SnS 2 and Co 9 S 8 , the energy level structure was established, the Fermi level of n-type semiconductor SnS 2 was close to its conduction band, and the Fermi level of p-type semiconductor Co 9 S 8 was close to its valence band.…”