One-Step Hydrothermal Synthesis of Nanostructured MgBi2O6/TiO2 Composites for Enhanced Hydrogen Production

Feng Xu; Chaohao Hu; Di Zhu; Dianhui Wang; Yan Zhong; Chengying Tang; Huaiying Zhou

doi:10.3390/nano12081302

One-Step Hydrothermal Synthesis of Nanostructured MgBi₂O₆/TiO₂ Composites for Enhanced Hydrogen Production

Nanomaterials (Basel). 2022 Apr 11;12(8):1302. doi: 10.3390/nano12081302.

Authors

Feng Xu¹, Chaohao Hu^{1

2}, Di Zhu¹, Dianhui Wang^{1

2}, Yan Zhong^{1

2}, Chengying Tang^{1

2}, Huaiying Zhou^{1

2}

Affiliations

¹ School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China.
² Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, China.

Abstract

A highly efficient MgBi2O₆ (MBO)/TiO₂ heterostructured photocatalyst for the evolution of H₂ was successfully prepared using a one-step hydrothermal method. The phase structure, microstructure and optical properties of the MBO/TiO₂ composites were investigated by various experimental techniques. A series of H₂ production experiments were performed under visible light. The measured results indicated that the nanostructured MBO/TiO₂ composite, with a stoichiometric molar ratio of MBO:TiO₂ = 0.2%, displayed the best H₂ production rate of 3413 μmol h^-1 g^-1. The excellent photocatalytic performance of the obtained composite material was due to the heterojunction formed between MBO and TiO₂, which reduced the charge transfer resistance and accelerated the separation efficiency of the photogenerated electron-hole pairs. The reaction mechanism was also discussed in detail.

Keywords: MgBi2O6/TiO2; heterojunction; hydrothermal method; photocatalyst.

Abstract

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