基于配体到金属电荷转移机制的可见光下高效光催化析氢的 Pt-Chitosan-TiO。
Pt-Chitosan-TiO for Efficient Photocatalytic Hydrogen Evolution via Ligand-to-Metal Charge Transfer Mechanism under Visible Light.
机构信息
College of Life Sciences, Fujian Normal University, Fuzhou 350117, China.
College of Environmental Science and Engineering, Fujian Normal University, Fujian Key Laboratory of Pollution Control & Resource Reuse, Fuzhou 350007, China.
出版信息
Molecules. 2022 Jul 22;27(15):4673. doi: 10.3390/molecules27154673.
The Pt-chitosan-TiO charge transfer (CT) complex was synthesized via the sol-gel and impregnation method. The synthesized photocatalysts were thoroughly characterized, and their photocatalytic activity were evaluated toward H production through water reduction under visible-light irradiation. The effect of the preparation conditions of the photocatalysts (the degree of deacetylation of chitosan, addition amount of chitosan, and calcination temperature) on the photocatalytic activity was discussed. The optimal Pt-10%DD75-T200 showed a H generation rate of 280.4 μmol within 3 h. The remarkable visible-light photocatalytic activity of Pt-chitosan-TiO was due to the CT complex formation between chitosan and TiO, which extended the visible-light absorption and induced the ligand-to-metal charge transfer (LMCT). The photocatalytic mechanism of Pt-chitosan-TiO was also investigated. This paper outlines a new and facile pathway for designing novel visible-light-driven photocatalysts that are based on TiO modified by polysaccharide biomass wastes that are widely found in nature.
通过溶胶-凝胶法和浸渍法合成了 Pt-壳聚糖-TiO 电荷转移 (CT) 配合物。对合成的光催化剂进行了彻底的表征，并通过可见光照射下的水还原评价了它们在 H 生产方面的光催化活性。讨论了光催化剂的制备条件（壳聚糖的脱乙酰度、壳聚糖的添加量和煅烧温度）对光催化活性的影响。最佳的 Pt-10%DD75-T200 在 3 小时内产生了 280.4 μmol 的 H 生成速率。Pt-壳聚糖-TiO 的显著可见光光催化活性归因于壳聚糖和 TiO 之间的 CT 配合物形成，这扩展了可见光吸收并诱导了配体到金属电荷转移 (LMCT)。还研究了 Pt-壳聚糖-TiO 的光催化机制。本文概述了一种新的简便途径，用于设计基于 TiO 的新型可见光驱动光催化剂，该催化剂是通过对自然界中广泛存在的多糖生物质废料进行修饰得到的。
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