Rational design of hierarchical nanocomposites is a promising approach for efficient energy harvesting and conversion. A noble-metal-free ternary hierarchical composite, Cd_0.5Zn_0.5S-g-C₃N₄-MoS₂, has been developed. Materials were chosen based on their relative band-edge alignments and they were studied as a composite for photocatalytic properties. The photocatalytic activity was evaluated by measuring the rate of photodriven H₂ evolution with concomitant degradation of organic pollutants, such as Rhodamine B. Optimization of the loading of g-C₃N₄ and MoS₂ onto Cd_0.5Zn_0.5S results in an enhanced yield of hydrogen evolution by ∼120% (Cd_0.5Zn_0.5S-g-C₃N₄) and ∼197% (Cd_0.5Zn_0.5S-g-C₃N₄-MoS₂) compared to bare Cd_0.5Zn_0.5S. The ternary hybrid, Cd_0.5Zn_0.5S-g-C₃N₄-MoS₂ resulted in an apparent quantum yield (AQY) of 38% at 420 nm. The significant improvement in photocatalytic performance in the composite can be attributed to enhanced interfacial charge transfer of electrons from g-C₃N₄ to Cd_0.5Zn_0.5S and MoS₂. We surmise that the close proximity of the energies of conduction band edge for each component in the ternary composite promotes better charge separation.

中文翻译：

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集成到Cd _0.5 Zn _0.5 S上的gC ₃ N ₄和MoS _2的杂化物：具有有效电荷转移以增强光催化活性的合理设计

分层纳米复合材料的合理设计是有效收集和转换能量的有前途的方法。已开发出无贵金属的三元分层复合材料Cd _0.5 Zn _0.5 S-gC ₃ N ₄ -MoS ₂。根据材料的相对能带边缘排列选择材料，并将它们作为光催化性能的复合材料进行研究。通过测量光驱动的H ₂放出速率以及伴随的有机污染物如罗丹明B的降解来评估光催化活性。优化gC ₃ N ₄和MoS ₂在Cd _0.5 Zn上的负载量的优化与裸露的Cd _0.5相比，_0.5 S导致析氢的产率提高了〜120％（Cd _0.5 Zn _0.5 S-gC ₃ N ₄）和〜197％（Cd _0.5 Zn _0.5 S-gC ₃ N ₄ -MoS ₂）。的Zn _0.5 S的三元混合，镉_0.5锌_0.5 S-GC ₃ ñ ₄ -MoS ₂导致在420nm处的38％的表观量子产率（AQY）。复合材料中光催化性能的显着改善可归因于来自gC的电子的界面电荷转移增强₃ N ₄至Cd _0.5 Zn _0.5 S和MoS ₂。我们推测三元复合物中每个组分的导带边缘能量非常接近，可以促进更好的电荷分离。