3D flower-like NiCo-LDH composites for a high-performance NO2 gas sensor at room temperature

被引：51

作者：

He, Lang ^{[1
]}

Zhang, Wenyuan ^{[3
]}

Zhang, Xueyi ^{[2
]}

Bai, Xue ^{[1
]}

Chen, Junkun ^{[1
]}

Ikram, Muhammad ^{[1
]}

Zhang, Guo ^{[1
]}

Shi, Keying ^{[1
]}

机构：

[1] Heilongjiang Univ, Minist Educ, Key Lab Funct Inorgan Mat Chem, Sch Chem & Mat Sci, Harbin 150080, Peoples R China

[2] Northeast Agr Univ, Coll Food Sci, Harbin 150030, Peoples R China

[3] Harbin Inst Technol, Sch Chem & Chem Engn, Harbin 150080, Peoples R China

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2020年 / 603卷

基金：

中国国家自然科学基金;

关键词：

Layered double hydroxide; eThin leaves; NO2(2); Gas sensor; Room temperature; DOUBLE HYDROXIDE NANOSHEETS; SENSING PERFORMANCE; FACILE SYNTHESIS; CARBON; NANOFLAKES; OXYGEN; NANOPARTICLES; FABRICATION; ADSORPTION; OXIDATION;

D O I：

10.1016/j.colsurfa.2020.125142

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：

Excellent response with a fast response/recovery time, as well as good repeatability and longtime stability, are considered to be advantageous features of an ideal gas sensor. To this purpose, in this paper, uniform 3D flower-like layered nickel-cobalt layered double hydroxide (NiCo-LDH) composites were prepared by a simple hydrothermal method. The gas sensing performance of the NiCo-LDH NO2 gas sensors was investigated at room temperature (RT). Among the composites, Ni1Co1 (Ni/Co molar ratio = 1:1) shows a high response of 31.22 at 100 ppm with fast response and recovery times equal to 1.6 s and 11.6 s, respectively. Similarly, the Ni1Co1 sensor indicates a low detection limit of only 0.01 ppm (10 ppb) and shows excellent stability (60 days) and high selectivity to NO2. The NiCo-LDH sensor has excellent NO2 gas sensitivity performance due to its a high specific surface area or Co(OH)(2) and Ni(OH)(2) synergy. Therefore, we believe that Ni/Co-LDH sensors can be widely used in the field at RT and have good development prospects.

引用

页数：11