中文(简体)MOF/g-C ∝ N ₄ heterojunction significantly improves photocatalytic hydrogen production efficiency in energy applications
Date: May 12th, 2024
Source: Energy Materials Express
Research has shown that the heterojunction constructed between MOF and g-C ∝ N ₄ can effectively promote charge separation and significantly improve the efficiency of photocatalytic hydrogen production.
Research details:
The II heterojunction formed by ZIF-8/g-C ∝ N ₄ increased the H ₂ yield by 8 times. The amino group of UiO-66-NH ₂ forms hydrogen bonds with g-C ∝ N ₄, accelerating hole migration. To solve the problem of poor thermal stability of MOFs, researchers have improved the stability of the material under high temperature conditions by using atomic layer deposition of Al ₂ O3 coating.
Technical highlights:
A research team from Three Gorges University has designed T-C type COFs with ketone enol tautomeric units, whose dynamic electron/hole traps can promote rapid charge transfer and prolong carrier lifetime. The generation rate of H ₂ O ₂ in the dispersion of TpBpy under simulated light reached 8350 μ mol h ⁻¹ g ⁻¹, and the solar energy conversion efficiency in the flow reactor under natural light reached 0.038%.
Application prospects:
This technology provides a new way for large-scale solar hydrogen production and is expected to promote the development of the green hydrogen energy industry. It is expected that by 2030, the cost of photocatalytic hydrogen production will be reduced to 2-3 US dollars per kilogram, with commercial application potential.
