Activation of 2D cobalt hydroxide with 0D cobalt oxide decoration for microplastics degradation and hydrogen evolution
Activation of 2D cobalt hydroxide with 0D cobalt oxide decoration for microplastics degradation and hydrogen evolution
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DOI：
10.1016/j.cej.2023.144569
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发表时间：
2023-09
影响因子：
15.1
通讯作者：
Rossella Greco;Lucía Baxauli-Marin;Filipp Temerov;M. Daboczi;Salvador Eslava;Y. Niu;A. Zakharov;Meng Zhang;Taohai Li;Wei Cao
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文献类型：
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作者：
Rossella Greco;Lucía Baxauli-Marin;Filipp Temerov;M. Daboczi;Salvador Eslava;Y. Niu;A. Zakharov;Meng Zhang;Taohai Li;Wei Cao
二维半导体由于其独特的催化和物理特性而在环境和能源领域发挥着重要作用。一个2D矩阵的多功能性将扩大其应用范围，但需要专门的工程路径。在这项工作中，我们提出了一个跨维的策略，通过装饰0D Co3O4到2D Co（OH）2，形成一个多功能的光催化剂。一锅法水热合成的Co3O4@Co（OH）2复合材料在0.495 W白色LED照明下降解聚苯乙烯微塑料的效率为40%。在一个单独的实验中，在不存在牺牲剂的情况下评估了水裂解的H2析出反应，导致43 μmol g− 1和在420 nm处的3.48%的表观量子效率。的能带图的紫外可见光和环境光电子能谱的研究和参与光催化降解反应中的自由基的分析允许揭开本文研究的过程中的机制。最后，我们可以证实，异质结构有利于2D和0D对应物的氧化还原电位，并且在跨越两个不同维度时易于电子转移。这些结果为低维材料的多功能跨维活化提供了指导和启示。
The 2D semiconductors are important players in environmental and energy fields due to their unique catalytic and physical properties defined by their dimensionality. Versatile functionalities on one 2D matrix will enlarge its application scopes but require dedicated engineering paths. In this work, we present a cross-dimensional strategy by decorating 0D Co3O4onto 2D Co(OH)2to form a multifunctional photocatalyst. The one-pot hydrothermally synthesized Co3O4@Co(OH)2composite is capable of degrading polystyrene microplastics with an efficiency of 40% under 0.495 W white LED illumination. In a separated experiment, H2evolution reaction from water splitting was evaluated in absence of sacrificial agents leading to 43 μmol g−1and to an apparent quantum efficiency of 3.48% at 420 nm. The study of the energy band diagrams by UV–Visible and ambient photoemission spectroscopy and the analysis of the radicals involved in the reaction of photocatalytic degradation allow to unveil the mechanisms for both the processes herein studied. Finally, we could confirm that the heterostructure benefits the redox potentials of 2D and 0D counterparts and facile electron transfers when crossing two different dimensions. These results provide guidelines and inspiration for cross-dimensional activations of low-dimensional materials for versatile functionalities.