Construction of a micro-nano reactor assembled by TiO2/N-C ultrathin sheets for photocatalytic H2 evolution.
Construction of a micro-nano reactor assembled by TiO2/N-C ultrathin sheets for photocatalytic H2 evolution.
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TiO2/N-C超薄片组装的微纳米反应器的构建用于光催化析氢。
DOI：
10.1039/d3cc01322g
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发表时间：
2023
影响因子：
4.9
通讯作者：
Xiaochi Han
中科院分区：
文献类型：
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作者：
Yu Wang;Wenwen Zhan;Lei Yang;Jianwei Zhao;Liming Sun;Xiaojun Wang;Xiaochi Han
本文通过调节不同厚度的N掺杂碳包覆TiO2异质结纳米片组装的微纳反应器，分别命名为TiO2/N-C空心骨架（HF）、TiO2/N-C纳米片组装空心六面体（HHS）和TiO2/N-C超薄纳米片组装空心六面体（HHUS）。 NH2-MIL-125，然后热解。实验和理论研究表明，随着异质结纳米片亚基厚度的减小，更多的低配位Ti原子将被暴露出来作为光催化析氢的有效位点，碳层与TiO2之间的相互作用也会增强，这为光生载流子的有效分离提供了平滑的迁移路径。因此，具有最薄纳米片亚基的TiO2/N-C HHUS表现出最好的光电性能和最高的光催化产氢活性。
In this paper, a series of micro-nano reactors assembled by N doped carbon coated TiO2 heterojunction nanosheets with different thickness, named TiO2/N-C hollow framework (HF), TiO2/N-C hollow hexahedron assembled by nanosheets (HHS), and TiO2/N-C hollow hexahedron assembled by ultrathin nanosheets (HHUS), have been prepared by adjusting the alcoholysis rate of NH2-MIL-125 and then pyrolysis. Experimental and theoretical studies revealed that with the decrease of the thickness of the heterojunction nanosheet subunit, more low-coordination Ti atoms would be exposed as effective sites for photocatalytic H2 evolution, and the interaction between the carbon layer and TiO2 would also be enhanced, which provided a smooth migration path for the effective separation of photogenerated carriers. Thus, TiO2/N-C HHUS with the thinnest nanosheet subunit exhibited the best photoelectric performance and the highest photocatalytic hydrogen production activity.
利兹大学/谢菲尔德大学（英国）
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