In:
Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 10, No. 48 ( 2022), p. 25586-25594
Abstract:
Ternary ZnIn 2 S 4 (ZIS) chalcogenide is regarded as a promising candidate for photocatalytic hydrogen production performance; however, its activity is limited by the low separation efficiency and poor migration ability of photoexcited charge carriers. Herein, porous ZnIn 2 S 4 photocatalysts with confined sulfur vacancies were successfully fabricated, alleviating the above issues that impair the hydrogen evolution rate. Due to the pore structure, the charge transfer diffusion pathway is greatly shortened. Furthermore, the sulfur vacancies can serve as electron trapped centers, which greatly suppresses the recombination of photogenerated carriers. As a result, the porous ZnIn 2 S 4 with confined sulfur vacancies exhibits an optimum hydrogen evolution rate of up to 1537.65 ± 118.65 μmol h −1 (61 506 ± 4746 μmol g −1 h −1 ), which is approximately 6 times higher than that of pristine ZIS, and achieves an apparent quantum efficiency of 56.53% at 420 ± 15 nm. This work highlights the synergistic effects of pore structure and vacancy structure for enhancing H 2 evolution performance, and further provides new ideas to design and synthesize novel photocatalysts for highly efficient solar energy conversion.
Type of Medium:
Online Resource
ISSN:
2050-7488
,
2050-7496
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
2702232-8
