One-step synthesis of hierarchical Ni-Fe-Al layered double hydroxide with excellent sensing properties for NOx at room temperature

被引：25

作者：

Hong, Dahai ^{[1
]}

Zhang, Jiawei ^{[3
]}

Rehman, Afrasiab Ur ^{[1
]}

Gong, Lihong ^{[3
]}

Zhou, Jiao ^{[1
]}

Kan, Kan ^{[1
]}

Li, Li ^{[1
,2
]}

Shi, Keying ^{[1
,3
]}

机构：

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

[2] Heilongjiang Univ, Sch Chem & Mat Sci, Key Lab Chem Engn Proc & Technol High Efficiency, Harbin 150080, Peoples R China

[3] Harbin Normal Univ, Modern Expt Ctr, Minist Educ, Key Lab Photon & Elect, Harbin 150025, Peoples R China

来源：

RSC ADVANCES | 2016年 / 6卷 / 105期

基金：

中国国家自然科学基金;

关键词：

GAS-SENSOR; ELECTRODE MATERIAL; FACILE SYNTHESIS; CATALYSTS; PERFORMANCE; FABRICATION; OXIDE; MICROSPHERES; ADSORPTION; NANOSHEETS;

D O I：

10.1039/c6ra21645e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this paper, hierarchical flower-like Ni-Al-layered double hydroxide (NA-LDH) and Ni-Fe-Al-layered double hydroxide (NFA-LDH) intercalation compounds were synthesized by a facile one-step hydrothermal method using sodium dodecyl sulfate (SDS) as the intercalation layer and template. The NFA-LDHs with a Ni : Fe : Al molar ratio of 1 : 1 : 1 (NFA 1-1), which have porous hierarchical nanostructures and channels between the layers, provided the channels with fast carrier transportation and gas adsorption-desorption. Therefore, NFA 1-1 showed good sensing properties at 100 ppb for the detection of NOx at room temperature, and the response toward 100 ppm NOx was 82%, which was 2.3 times higher than that of pure NA-LDHs at room temperature. NFA-LDHs might be promising compounds for high performance gas sensing for commercial application. The enhanced gas sensing of NFA 1-1 can be ascribed to the unique hierarchical porous structure and the highly oriented layered single crystal structure and composition, which can enhance conductivity/carrier densities, fast carrier transportation and gas adsorption-desorption, and provide a large number of active sites for surface contact reactions.

引用

页码：103192 / 103198

页数：7