首页|Construct 3D NiCo-LDH/Cu2O p-n heterojunction via electrostatic self-assembly for enhanced photocatalytic hydrogen evolution

Construct 3D NiCo-LDH/Cu2O p-n heterojunction via electrostatic self-assembly for enhanced photocatalytic hydrogen evolution

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  • NSTL
  • Elsevier
? 2022 The Korean Society of Industrial and Engineering ChemistryHydrogen evolution of inorganic photocatalysts is currently a hot research topic. In order to prepare highly efficient catalysts for hydrogen evolution, p-n type heterojunctions were successfully constructed by closely combining p-type Cu2O and n-type NiCo-LDH with opposite electrical properties by a simple electrostatic self-assembly. In addition, because the positions of the two single catalysts NiCo-LDH and Cu2O Fermi levels are dissimilar from those of traditional p-n heterojunctions, the extremely high movement of Fermi levels forms a strong built-in electric field, which powerfully prevents the gradient diffusion of charge and facilitates the migration of intrinsic photocarriers. Furthermore, the flower cluster NiCo-LDH is composed of two-dimensional thin sheet structure, which has a large specific surface area and can prevent Cu2O agglomeration. Under the condition of using triethanolamine solution and eosin Y (EY) respectively as sacrifice reagent reducing agent and photosensitizer, the composite catalyst has reached 18332 μmol·g?1 in 5 h, which was increased by 8.5 times compared to the pure Cu2O. This research provides an innovative strategy to construct a heterojunction between a metal double-layer hydroxide and a non-noble metal oxide to realize an effective photocatalytic hydrogen production.

Cu2O nanospheresHydrogen evolutionNiCo-LDHp-n heterojunctionPhotocatalysis

Fan Z.、Guo X.、Jin Z.、Zhang X.、Li Y.

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School of Chemistry and Chemical Engineering Ningxia Key Laboratory of Solar Chemical Conversion Technology Key Laboratory for Chemical Engineering and Technology State Ethnic Affairs Commission North Minzu University

Department of Metallurgical and Chemical Engineering Jiyuan Vocational and Technical College

College of Chemistry and Chemical Engineering Jishou University

2022

10.1016/j.jiec.2022.03.027

Journal of industrial and engineering chemistry

Journal of industrial and engineering chemistry

EISCI
ISSN：1226-086X
年,卷(期)：2022.110
  • 39
  • 64