A 20-core copper(I) nanocluster as electron-hole recombination inhibitor on TiO2 nanosheets for enhancing photocatalytic H2 evolution.
A 20-core copper(I) nanocluster as electron-hole recombination inhibitor on TiO2 nanosheets for enhancing photocatalytic H2 evolution.
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DOI：
10.1039/d1nr04683g
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发表时间：
2021-09
期刊：
影响因子：
6.7
通讯作者：
Yundong Cao;Hui-Ping Hao;Huaqiang Liu;Di Yin;Mingliang Wang;Guang-gang Gao;Lin-lin Fan;Hong Li
中科院分区：
文献类型：
--
作者：
Yundong Cao;Hui-Ping Hao;Huaqiang Liu;Di Yin;Mingliang Wang;Guang-gang Gao;Lin-lin Fan;Hong Li
对于原子精度的铜纳米团簇的设计，除了探索其美观的笼状结构外，其结构调制和潜在的应用正在被广泛探索。本文合成了一种原子精确的20核炔基铜纳米簇（UJN-Cu 20）。UJN-Cu 20的外层羟基通过氢键作用均匀地修饰在TiO 2纳米片表面，形成了高效的纳米复合光催化剂。通过构建Z-方案异质结，纳米复合材料的光催化析氢活性（13 mmol g-1 h-1）显着提高相比，二氧化钛纳米片（0.4 mmol g-1 h-1）。UJN-Cu 20作为窄带隙助催化剂，能够有效抑制TiO 2纳米片表面的电子-空穴复合，为铜团簇辅助高效光催化剂的设计提供了新的思路。
For the design of atom-precise copper nanoclusters, besides the exploration of their aesthetic cage-like architectures, their structural modulation and potential applications are being extensively explored. Herein, an atom-precise 20-core copper(I)-alkynyl nanocluster (UJN-Cu20) protected by ethinyloestradiol ligands issynthesized. By virtue of outer-shell hydroxyl groups, UJN-Cu20 could be uniformly modified on the surface of TiO2 nanosheets via hydrogen bonding interactions, thus forming an efficient nanocomposite photocatalyst for hydrogen evolution. By constructing a Z-scheme heterojunction, the photocatalytic hydrogen evolution activity of the nanocomposite (13 mmol g-1 h-1) significantly improved as compared to that of TiO2 nanosheets (0.4 mmol g-1 h-1). As a narrow bandgap cocatalyst, UJN-Cu20 is confirmed to effectively inhibit the electron-hole recombination on the surface of the TiO2 nanosheet, which provides a new concept for the design of copper cluster-assisted effective photocatalysts.