一步水热合成纳米结构的MgBiO/TiO复合材料用于增强产氢性能

One-Step Hydrothermal Synthesis of Nanostructured MgBiO/TiO Composites for Enhanced Hydrogen Production.

作者信息

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

机构信息

School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China.

Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, China.

出版信息

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

DOI:10.3390/nano12081302

PMID:35458009

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9026981/

Abstract

A highly efficient MgBi2O (MBO)/TiO heterostructured photocatalyst for the evolution of H was successfully prepared using a one-step hydrothermal method. The phase structure, microstructure and optical properties of the MBO/TiO composites were investigated by various experimental techniques. A series of H production experiments were performed under visible light. The measured results indicated that the nanostructured MBO/TiO composite, with a stoichiometric molar ratio of MBO:TiO = 0.2%, displayed the best H production rate of 3413 μmol h g. The excellent photocatalytic performance of the obtained composite material was due to the heterojunction formed between MBO and TiO, 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.

摘要

采用一步水热法成功制备了一种用于析氢的高效MgBi2O（MBO）/TiO异质结构光催化剂。通过各种实验技术研究了MBO/TiO复合材料的相结构、微观结构和光学性质。在可见光下进行了一系列产氢实验。测量结果表明，化学计量摩尔比为MBO:TiO = 0.2%的纳米结构MBO/TiO复合材料表现出最佳产氢速率，为3413 μmol h g。所得复合材料优异的光催化性能归因于MBO和TiO之间形成的异质结，它降低了电荷转移电阻并加速了光生电子-空穴对的分离效率。还详细讨论了反应机理。