AI Article Synopsis
- Researchers developed a new type of photocatalyst made from hierarchical sponge-like structures of S-doped poly(heptazine imide) using a simple bottom-up method.
- The unique porous design and sulfur doping enhance the material's ability to absorb visible light and efficiently separate charges, making it more effective in photocatalysis.
- The new photocatalyst showed a remarkable improvement in water reduction rates, achieving a performance significantly better than traditional bulk materials.
Article Abstract
Simultaneously manipulating the nanostructure and band structure of semiconductors for boosting the photocatalytic performance of photocatalyts is highly desirable. Herein, a series of hierarchical sponge-like S-doped poly(heptazine imide) (HS-SPHI) assembled by ultrathin nanosheets were successfully fabricated via a facile bottom-up supramolecular preassembly approach using melamine (MA) and trithiocyanuric acid (TTCA) as precursors. Benefiting from the synergistic effect of the S-doping and their unique hierarchical porous structure coupled with quantum confinement effect, the as-obtained HS-SPHIs are endowed with extended visible-light response, improved charge separation efficiency, enlarged specific surface area, and enhanced thermodynamic driving force for water reduction. As a result, all the HS-SPHIs exhibit remarkable boosting visible-light (>420 nm) photocatalytic Hevolution (PHE). The maximum PHE rate achieved by HS-SPHI-650 can be up to 3584.2 μmol gh, with an apparent quantum efficiency (AQE) of 14.67 % at 420 nm, which is about 22.4 times than that of pristine bulk g-CN (B-GCN). We believe that this work will provide a significant strategy for optimizing the band structure of PCN in order to improve its photocatalytic performance.
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| http://dx.doi.org/10.1016/j.jcis.2023.03.208 | DOI Listing |
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