Amorphous Pt-Decorated NiFe2O4 Nanorods for Acetone Sensing

被引:0
|
作者
Xie, Jie [1 ]
Xie, Ting [1 ]
An, Chenglin [1 ]
Zhao, Yingni [1 ]
Wu, Jiangtao [1 ]
Wu, Xiaochun [1 ]
机构
[1] Sichuan Normal Univ, Coll Chem & Mat Sci, Chengdu 610068, Peoples R China
基金
中国国家自然科学基金;
关键词
NiFe2O4; amorphous Pt; nanorod; impregnation method; acetone sensor; GAS SENSOR; OXIDATION; CATALYST; MOFS;
D O I
10.1021/acsanm.4c05609
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The decoration of less agglomerated hierarchical semiconducting metal oxides with noble metals is a widely used strategy to obtain high-performance gas sensors. Beyond conventional approaches, we synthesized amorphous Pt-decorated NiFe2O4 nanorods as sensing materials by using a temperature-controlled one-step impregnation method. This method is characterized by its simplicity and green, energy-efficient, and economical use of noble metals. The Pt-decorated NiFe2O4 nanorods show unusual resistance behavior in air, and their operating temperature-resistance curve exhibits two transitions. This phenomenon results from the enhanced chemisorption of oxygen molecules compared to pristine NiFe2O4, which was proven by the operating temperature-dependent resistance behavior in N-2. The synergistic effects between the amorphous noble metal and less agglomerated structure lead to significantly improved sensing performance to acetone, especially the 5 wt % Pt-decorated NiFe2O4. It shows a 37-fold increase in gas response, a lower optimal operating temperature, and enhanced selectivity compared to its counterpart. This research offers an efficient method for designing noble metal-decorated, high-performance metal oxide sensing materials and provides insights into the baseline resistance of oxygen chemisorption onto the surface sensing materials.
引用
收藏
页码:28478 / 28485
页数:8
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