Z-scheme CdS/Co₉S₈-RGO for photocatalytic hydrogen production

Abstract

All-solid-state Z-scheme CdS/Co9S8-RGO heterostructures are synthesized by a facile one-pot hydrothermal method followed by annealing, which exhibit a H2 evolution rate up to 4.82 mmol h−1 g−1 and a remarkable stability due to an efficient charge transfer and separation.

Hollow Nanorods and Amorphous Co9S8 Quantum Dots Construct S-Scheme Heterojunction for Efficient Hydrogen Evolution

“…Kai’s group used simple hydrothermal and annealing treatments to grow an all-solid Z-scheme with nanorods as the core and CoS hexagonal nanosheets as the shell on graphene sheets. The existence of the three heterostructures establishes a path for charge transfer and separation, which makes the material exhibit stable hydrogen production activity . Besides, there have been reported studies to make Co 9 S 8 and Ni 3 S 2 uniformly distributed through in situ vulcanization.…”

“…The existence of the three heterostructures establishes a path for charge transfer and separation, which makes the material exhibit stable hydrogen production activity. 32 Besides, there have been reported studies to make Co arrangement of local electrons, resulting in the existence of the most active sites. 33 NiTiO 3 as a hollow nanomaterial with a suitable band gap (2.18 eV) is used in photocatalysis research.…”

Hollow Co9S8/CdS Nanocages as Efficient Photocatalysts for Hydrogen Evolution

“…(b) Time course of hydrogen evolution of different samples in Na 2 S/Na 2 SO 3 under irradiation. (c) Comparison of hydrogen production efficiency with other literature. − (d) Different scavengers focus on hydrogen production under irradiation of a 300 W Xe lamp with a 420 nm cutoff filter (AM 1.5).…”

Chitosan-derived carbon supported CoO combined with CdS facilitates visible light catalytic hydrogen evolution

“…[1][2][3][4] The photocatalytic hydrogen evolution reaction (HER), 5,6 which is driven by sunlight to split water and reduces the proton hydrogen in water to hydrogen, 7,8 is regarded as an effective way to alleviate energy shortage and environmental pollution problems. 9 So far, many semiconductor materials have been used as photocatalysts to split water to produce hydrogen under visible light irradiation, such as CdS, [10][11][12] TiO 2 , 13,14 g-C 3 N 4 , 15,16 black phosphorus, 17,18 etc. In the past decades, although semiconductor photocatalysts have achieved great success, it is undeniable that the low migration efficiency of photogenerated carriers in photocatalysts and the easy recombination of electrons and holes are still limiting their large scale application.…”