The utilization of the organic–inorganic hybrid photocatalysts for water splitting has gained significant attention due to their ability to combine the advantages of both materials and generate synergistic effects. However, they are still far from practical application due to the limited understanding of the interactions between these two components and the complexity of their preparation process. Herein, a facial approach by combining a glycolated conjugated polymer with a TiO_2−X mesoporous sphere to prepare high-efficiency hybrid photocatalysts is presented. The functionalization of conjugated polymers with hydrophilic oligo (ethylene glycol) side chains can not only facilitate the dispersion of conjugated polymers in water but also promote the interaction with TiO_2−X forming stable heterojunction nanoparticles. An apparent quantum yield of 53.3% at 365 nm and a hydrogen evolution rate of 35.7 mmol h⁻¹ g⁻¹ is achieved by the photocatalyst in the presence of Pt co-catalyst. Advanced photophysical studies based on femtosecond transient absorption spectroscopy and in situ, XPS analyses reveal the charge transfer mechanism at type II heterojunction interfaces. This work shows the promising prospect of glycolated polymers in the construction of hybrid heterojunctions for photocatalytic hydrogen production and offers a deep understanding of high photocatalytic performance by such heterojunction photocatalysts.

中文翻译：

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轻松合成乙醇化共轭聚合物-TiO2−X 的有机-无机杂化异质结，用于高效光催化析氢


有机-无机杂化光催化剂用于水分解的利用因其能够结合两种材料的优点并产生协同效应而受到广泛关注。然而，由于对这两种成分之间的相互作用的了解有限以及其制备过程的复杂性，它们距离实际应用还很远。在此，提出了一种通过将乙醇酸化共轭聚合物与TiO _2−X 介孔球相结合来制备高效混合光催化剂的面部方法。具有亲水性低聚乙二醇侧链的共轭聚合物的官能化不仅可以促进共轭聚合物在水中的分散，而且可以促进与TiO _2−X 的相互作用，形成稳定的异质结纳米颗粒。在 Pt 助催化剂存在下，该光催化剂在 365 nm 处的表观量子产率为 53.3%，析氢率为 35.7 mmol h ⁻¹ g ⁻¹ 。基于飞秒瞬态吸收光谱和原位 XPS 分析的先进光物理研究揭示了 II 型异质结界面的电荷转移机制。这项工作展示了乙醇酸化聚合物在构建用于光催化制氢的杂化异质结中的广阔前景，并提供了对此类异质结光催化剂的高光催化性能的深刻理解。