Meidan Que , Yabo Wang , Ruochen Shi , Xun Sun , Jun Xu , Peihong Ma , Yanbo Sun , Jing Guan , Shengxia An
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引用次数: 0
摘要
众所周知,MIL-125(Ti)具有稳定的结构、可调的电子结构和多个活性位点,是光催化领域的常用研究材料。本研究通过一步水热法制备了一系列掺杂稀土(RE)的 MIL-125(Ti)(RE=Ce、Pr、Tm、Dy、Eu 和 Sm)。值得注意的是,与其他掺杂稀土元素的 MIL-125 相比,Pr-MIL-125 的催化性能明显增强,其 CO 和 CH4 的最大产率分别为 13.30 和 0.87 µmol-g-1-h-1,分别是原始 MIL-125 的 2.53 倍和 4.14 倍。层状形态赋予了 Pr-MIL-125 更多的活性位点,促进了光还原 CO2 的反应。此外,Pr 离子掺杂剂促进的光活性还能起到电子转移桥的作用,抑制电荷重组。这项工作将为设计基于 RE-MOF 的光催化剂和提高光还原 CO2 的性能提供启示和指导。
Constructing electron transfer bridge of Pr doping MIL-125(Ti) for high-efficient photoreduction CO2
MIL-125(Ti) is well known for having stable structure, tunable electron structure, and multiple active sites, which is commonly studied in the field of photocatalysis. In this work, a series of rare earth (RE) doped MIL-125(Ti) (RE=Ce, Pr, Tm, Dy, Eu, and Sm) are prepared via the one-step hydrothermal method. Notably, Pr-MIL-125 displays a significantly enhanced catalytic performance than other RE-doped MIL-125, resulting in a maximal CO and CH4 yield of 13.30 and 0.87 µmol·g−1·h−1, respectively, which are 2.53-fold and 4.14-fold of the pristine MIL-125. The layered morphology endows Pr-MIL-125 with more active sites and facilitates the reaction of photoreduction CO2. Furthermore, the promoted photoactivities attributed to Pr ion dopant can act as electron transfer bridge and suppress charge recombination. This work would provide insight and guidance for designing RE-MOF based photocatalysts and enhancing the performance of photoreduction CO2.
期刊介绍:
Applied Catalysis A: General publishes original papers on all aspects of catalysis of basic and practical interest to chemical scientists in both industrial and academic fields, with an emphasis onnew understanding of catalysts and catalytic reactions, new catalytic materials, new techniques, and new processes, especially those that have potential practical implications.
Papers that report results of a thorough study or optimization of systems or processes that are well understood, widely studied, or minor variations of known ones are discouraged. Authors should include statements in a separate section "Justification for Publication" of how the manuscript fits the scope of the journal in the cover letter to the editors. Submissions without such justification will be rejected without review.