In:
Catalysis Science & Technology, Royal Society of Chemistry (RSC), Vol. 13, No. 16 ( 2023), p. 4729-4743
Abstract:
Ultrathin electron-modulated porous zeolite MFI hollow sulfated doped Ti-containing molecular sieves (TS) were modified through a process that included the incorporation of sulfur and g-C 3 N 4 nanosheets, followed by the integration of Au-modified TiO 2 with an appropriate energy platform. The resulting hybrid material exhibited remarkable visible-light photoactivities, showing ≈18 and 19 times higher efficiency in producing H 2 and CH 4 from water and CO 2 , respectively, compared to the pristine zeolite TS. Notably, the hybrid material demonstrated excellent quantum efficiencies at a wavelength of 420 nm. The observed phenomenon is directly linked to the effective band gap engineering achieved through the cooperative effect of g-C 3 N 4 in the nanocomposite. This engineering approach enhances both light capture and charge separation processes. Various spectroscopic techniques and electrochemical studies confirm that the distinct photoresponses can be attributed to the nanocomposite's remarkable surface area, resulting from its permeable morphology. Moreover, the modulation of excited electrons from TS nanosheets to g-C 3 N 4 , along with the catalytic functions of decorated sulphur and coupled Au–TiO 2 nanosheets, significantly contributes to improved charge separation. Through conversion experiments utilizing 13 CO 2 and D 2 O, it was determined that ˙CO 2 and ˙H are the active species responsible for the production of CH 4 from CO 2 . This research opens up possibilities for the development of highly efficient and stable nanophotocatalysts, enabling latent energy production and environmental remediation.
Type of Medium:
Online Resource
ISSN:
2044-4753
,
2044-4761
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
2595090-3
Permalink