High-performance H2 gas sensor based on Mn-doped α-Fe2O3 polyhedrons from N, N-dimethylformamide assisted hydrothermal synthesis

被引：30

作者：

Ai, Tianyu ^{[1
]}

Li, Jing ^{[1
]}

Nie, Shuai ^{[1
]}

Yin, Yansheng ^{[2
]}

Lu, Jinlin ^{[2
]}

Bao, Shuo ^{[1
]}

Yan, Ling ^{[3
]}

机构：

[1] Univ Sci & Technol Liaoning, Sch Mat & Met, Anshan 114051, Peoples R China

[2] Guangzhou Maritime Univ, Res Ctr Corros & Eros Proc Control Equipment & Ma, Guangzhou 510725, Guangdong, Peoples R China

[3] State Key Lab Met Mat Marine Equipment & Applicat, Anshan 114021, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2022年 / 47卷 / 47期

基金：

中国国家自然科学基金;

关键词：

Mn-doped alpha-Fe2O3; N; N-dimethylformamide; Hydrothermal method; Fast response; Hydrogen gas sensing; n-p transition; HYDROGEN; NANOPARTICLES; CONSTRUCTION;

D O I：

10.1016/j.ijhydene.2022.04.168

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Transition elements doping metal oxide is of great significance for developing gas sensors with high performance. To achieve this goal, alpha-Fe2O3 rod and Mn-doped alpha-Fe2O3 poly-hedrons are successfully synthesized by a facile N, N-dimethylformamide assisted hydrothermal method and characterized by several physical techniques. The morphology of alpha-Fe2O3 is evolved by introducing Mn elements. The performance of the alpha-Fe2O3 rod and Mn-doped alpha-Fe2O3 polyhedrons as H-2 gas sensors are studied and compared. The Mn/alpha-Fe2O3-5( )polyhedrons sensor exhibit the best performance at optimum operating temperature of 300 degrees C. The response and recovery times are 10 s/24 s for H-2 with a concentration of 200 ppm, which is much faster in contrast to those recently reported H-2 gas sensors. Furthermore, alpha-Fe2O3 rod and Mn-doped alpha-Fe2O3 polyhedrons show abnormal n-p transition sensing behavior with the change of operating temperature. This work provides a facile method for synthesizing alpha-Fe(2)O(3 )based sensing materials for various sensors applications. (C) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：20561 / 20571

页数：11

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