A metal-complex-modified graphitic carbon nitride (g-CN) bulk heterostructure is presented here as a promising alternative to high-cost noble metals as artificial photocatalysts. Theoretical and experimental studies of the spectral and physicochemical properties of three structurally similar molecules , , and confirm that the Pt(II) acetylide group effectively expands the electron delocalization and adjusts the molecular orbital levels to form a relatively narrow bandgap. Using these molecules, the donor-acceptor assemblies @, @, and @ are formed with g-CN. Among these assemblies, the Pt(II) acetylide-based composite materials @ and @ with bulk heterojunction morphologies and extremely low Pt weight ratios of 0.19% and 0.24%, respectively, exhibit the fastest charge transfer and best light-harvesting efficiencies. Among the tested assemblies, 10 mg @ without any Pt metal additives exhibits a significantly improved photocatalytic H generation rate of 1.38 µmol h under simulated sunlight irradiation (AM1.5G, filter), which is sixfold higher than that of the pristine g-CN.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7887596 | PMC |
| http://dx.doi.org/10.1002/advs.202002465 | DOI Listing |
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