Direct Z-scheme CdS–NiPc heterojunctions as noble metal-free photocatalysts for enhanced photocatalytic hydrogen evolution

Abstract

The reasonable construction of Z-scheme heterojunction is an effective pathway to enhance the photocatalytic performance. In this work, a direct Z-scheme cadmium sulfide-nickel phthalocyanine (CdS-NiPc) heterojunction was successfully constructed by...

Bifunctional thioacetamide-mediated synthesis of few-layered MoOSx nanosheet-modified CdS hollow spheres for efficient photocatalytic H2 production

“…Among them, the pure CdS hollow spheres showed a negligible rate of H 2 generation, mostly owing to the severe recombination of the photogenerated carriers and sluggish interfacial H 2 -production dynamics. 41–43 After introducing few-layered MoOS x nanosheets, it could be directly noticed that the resultant few-layered MoOS x /CdS hollow sphere photocatalysts acquired a remarkable enhancement in the H 2 evolution activity, exactly certifying that the loading of the few-layered MoOS x nanosheets onto the CdS hollow spheres can effectively boost the overall performance in photocatalytic H 2 generation. Particularly, the MoOS x /CdS (1 wt%) sample reached the supreme H 2 -production rate of 929.40 μmol h −1 g −1 with an apparent quantum efficiency (AQE) of 7.2%, which is 3.7 folds that of pristine CdS.…”

“…10B and C). [56][57][58] Therefore, the obtained fewlayered MoOS x nanosheet-cocatalysts not only efficiently accelerate the charge migration, but also significantly promote the interfacial H 2 -evolution performance.…”

Spatially separated catalytic sites supplied with the CdS–MoS2–In2O3 ternary dumbbell S-scheme heterojunction for enhanced photocatalytic hydrogen production

“…1(d), strong diffraction peaks appear at 24.8 , 26.6 , 28.2 , 36.7 , 43.8 , and 47.9 , which can be attributed to the (100) and (002) of the hexagonal phase (CdS (JCPDS 6-314)), and ( 101), ( 102), ( 110) and (103) crystal planes, respectively. 32,33 No impurity peaks were found, indicating that CdS has good crystallinity and high purity. The MoS 2 -modied CdS-MoS 2 sample obtained by the solvothermal reaction at 200 C has no obvious shi of the XRD peak.…”

NiS as a Cocatalyst Decorated Heptazine-/Triazine-Based Carbon Nitride Coupled with Cd0.5Zn0.5S Solid Solution Heterojunction Photocatalysts: Efficient Interfacial Charge Transfer and Enhanced Photocatalytic Hydrogen Production Activity

“…Among the extensive investigation for ideal photocatalysts, sulfide-based semiconductors still remain as hotspot materials for the photocatalytic purpose. As a typical n-type semiconductor, CdS with a narrower band gap energy of about 2.4 eV and a high redox potential has been usually adopted to photocatalytic hydrogen evolution . However, CdS always suffers from serious photocorrosion .…”