Biomolecule-assisted self-assembly of CdS/MoS 2 /graphene hollow spheres as high-efficiency photocatalysts for hydrogen evolution without noble metals

Biomolecule-assisted synthesis of defect-mediated Cd1−xZnxS/MoS2/graphene hollow spheres for highly efficient hydrogen evolution

“…27 Generally, the growth of hollow spheres is facilitated by increasing the concentration of alkaline additives (Mo precursor). In the control experiments, the yield of hollow structures gradually decreases when the ratio of Zn increases.…”

“…A biomolecule-assisted method, a facile strategy for templatefree self-assembly of hollow spheres, was used to integrate Cd 1Àx Zn x S solid solutions with defective MoS 2 and graphene. 27 It was found that defect-rich MoS 2 decorated hollow spheres exhibited significantly enhanced capability for photocatalytic H 2 evolution. The optimal H 2 production rate of 2.97 mmol h À1 g À1 was 64 times higher than that of blank Cd 0.8 Zn 0.2 S, which was even 3.8 times higher than that of Cd 0.8 Zn 0.2 S/Pt.…”

Optimizing the precursor of sulfur source for hydrothermal synthesis of high performance CdS for photocatalytic hydrogen production

“…Generally, for the preparation of nanostructure CdS, organic sulfur sources such as thiourea (TA), thioacetamide (TAA) and L-cysteine (L-Cys) are more popular than inorganic one like Na 2 S. 35,[37][38][39][40][41][42][43] It can be ascribed to the fact that, compared to the rigid inorganic sulfur sources, organic sulfur sources have distinct advantages in exibility, structure variety and shape diversity, which can not only serve as a precursor of S 2À , but also as a complexing agent for Cd 2+ due to the presence of -NH 2 and -COOH ligand groups to control the nucleation and the growth of CdS. [43][44][45][46] Furthermore, under hydrothermal treatment, S 2À can be released gradually from these organic sulfur sources, which provides favorable conditions for the nucleation and the growth of CdS. Consequently, the structure and morphology of CdS can be manipulated by using different sulfur source.…”

MoS2 nanosheets direct supported on reduced graphene oxide: An advanced electrocatalyst for hydrogen evolution reaction

“…2 eV and 163.4 eV indicate that Mo 4+ and S 2- are the dominant oxidation states. It is obviously to see that there is a slight shift to all the binding energies compared with the reports of pristine MoS 2 [30]. It is demonstrated that MoS 2 NSs and rGO substrate was not only simply mixed but also have the interaction which improved its conductivity [31].…”