Photocatalytic hydrogen evolution and bacterial inactivation utilizing sonochemical-synthesized g-C3N4/red phosphorus hybrid nanosheets as a wide-spectral-responsive photocatalyst: The role of type…
By Wanjun Wang, Guiying Li, T. An, D. K. Chan, Jimmy C. Yu, P. Wong. Applied Catalysis B: Environmental, 2018
237 citations recorded by the source corpus.
Abstract Efficient sunlight harvesting is imperative in the design of ideal photocatalysts for both environmental and energy applications. In this study, a wide-spectral-responsive photocatalyst composited of g-C3N4/red P (CNP) hybrid nanosheets was developed by a one-step “green” sonochemical method at room temperature. Ultrasound irradiation causes exfoliation of the layered g-C3N4, downsizing the red P particles and anchoring them onto the g-C3N4 nanosheets to form intimate CNP heterojunctions. As a dual active center photocatalyst, the CNP heterostructures exhibit significantly enhanced photocatalytic activity both for H2 evolution and bacterial inactivation under visible light irradiation. In addition, the responsive wavelength of this new-fabricated photocatalyst can be extended to 700 nm. The crucial role of type I band alignment between g-C3N4 and red P is illuminated to facilitate the interface charge separation and extend the light response by efficiently utilizing the photogenerated e− excited from both g-C3N4 and red P. Moreover, a direct h+ oxidation mechanism rather than a e- reduction mechanism is also found for bacterial inactivation under anaerobic conditions. This work provides a general strategy to fabricate novel metal-free heterostructures with wide-spectral-responsive photocatalytic activity by taking advantage of the type I band alignment combined with the narrow band gap feature of elemental red P.
Subfields: Electrical and Electronic Engineering, Renewable Energy, Sustainability and the Environment
View Paper: https://www.semanticscholar.org/paper/bc82d32c5d90e7f024045b5336933ba3adb23c0e
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In Electrical and Electronic Engineering
In Renewable Energy, Sustainability and the Environment
Citations in the corpus
- Red phosphorus decorated and doped TiO2 nanofibers for efficient photocatalytic hydrogen evolution from pure water (2019, background): “S12) [51-53], which would benefit gas separation for hydrogen production via pure water splitting.”