Metal-organic frameworks (MOFs) have been attracted considerable attention in the field of energy generation and environmental remediation. However, the functionalization and diversification of MOFs are still challenging and imperative for the development of highly active MOF-based materials. In this article, a series of heterostructured ZnIn₂S₄@NH₂-MIL-125(Ti) nanocomposites with different NH₂-MIL-125(Ti) contents were fabricated via a facile solvothermal method. The photocatalytic activities of the obtained samples were evaluated by the photocatalytic H₂ production under visible-light illumination (λ > 420 nm). The results showed that the ZnIn₂S₄ nanosheets were highly dispersed on the surface of NH₂-MIL-125(Ti). The ZnIn₂S₄@NH₂-MIL-125(Ti) photocatalysts displayed higher photocatalytic activity than the pristine components for H₂ production. The optimal content of NH₂-MIL-125(Ti) was about 40 wt% and the corresponding photocatalytic H₂ production rate was 2204.2 μmol·h⁻¹·g⁻¹ (with an apparent quantum efficiency of 4.3% at 420 nm), which was 6.5 times higher than that of pure ZnIn₂S₄. The enhanced photocatalytic activity of ZnIn₂S₄@NH₂-MIL-125(Ti) composites should be attributed to the well-matched band structure and intimate contact interfaces between ZnIn₂S₄ and NH₂-MIL-125(Ti), which led to the effective transfer and separation of the photogenerated charge carriers. Moreover, the ZnIn₂S₄@NH₂-MIL-125(Ti) nanocomposites showed excellent stability during the photocatalytic reactions under visible light. Therefore, these kinds of MOF-based composites have great potentiality in energy conversion fields.

中文翻译：

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的构建异质日宁₂小号₄ @NH ₂ -MIL-125（Ti）的纳米复合材料为可见光驱动ħ ₂生产

金属有机框架（MOFs）已在能源产生和环境修复领域引起了相当大的关注。但是，MOF的功能化和多样化对于开发高活性的基于MOF的材料仍然具有挑战性和必要性。本文通过一种简便的溶剂热法制备了一系列不同结构的ZnIn ₂ S ₄ @NH ₂ -MIL-125（Ti）纳米复合材料，其不同的NH ₂ -MIL-125（Ti）含量。通过在可见光（λ＞ 420nm）下的光催化H ₂产生来评估所获得样品的光催化活性。结果表明，ZnIn ₂ S ₄纳米片高度分散在NH ₂ -MIL-125（Ti）的表面上。ZnIn ₂ S ₄ @NH ₂ -MIL-125（Ti）光催化剂显示出比原始组分更高的H ₂生产光催化活性。NH ₂ -MIL-125（Ti）的最佳含量约为40 wt％，相应的光催化H ₂产生率为2204.2μmol·h ^-1 ·g ^-1（在420 nm下的表观量子效率为4.3％）比纯ZnIn ₂ S ₄高6.5倍。ZnIn ₂ S ₄ @NH的增强的光催化活性₂ -MIL-125（Ti）复合材料应归因于ZnIn ₂ S ₄与NH ₂ -MIL-125（Ti）之间良好匹配的能带结构和紧密的接触界面，从而导致光生物质的有效转移和分离电荷载体。此外，ZnIn ₂ S ₄ @NH ₂ -MIL-125（Ti）纳米复合材料在可见光下的光催化反应过程中表现出优异的稳定性。因此，这些基于MOF的复合材料在能量转换领域具有巨大的潜力。