Enhanced Sub-ppm NH3 Gas Sensing Performance of PANI/TiO2 Nanocomposites at Room Temperature

被引：35

作者：

Zhu, Chonghui ^{[1
]}

Cheng, Xiaoli ^{[1
]}

Dong, Xin ^{[1
]}

Xu, Ying Ming ^{[1
]}

机构：

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

来源：

FRONTIERS IN CHEMISTRY | 2018年 / 6卷

基金：

中国国家自然科学基金; 对外科技合作项目（国际科技项目）;

关键词：

gas sensing; polyaniline; TiO2; NH3; nanocomposites; POLYANILINE NANOFIBERS; COMPOSITE NANOFIBERS; THIN-FILM; AMMONIA; SENSORS; NANOMATERIALS; FABRICATION; TIO2;

D O I：

10.3389/fchem.2018.00493

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

PANI/TiO2 nanocomposites spheres were synthesized using a simple and efficient one-step hydrothermal process. The morphology and structure of PANI/TiO2 nanocomposites spheres were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) techniques. The PANI/TiO2 nanocomposite sphere-based sensor exhibits good selectivity, sensitivity (5.4 to 100 ppm), repeatability, long-term stability and low detection limit (0.5 ppm) to ammonia at room temperature (20 +/- 5 degrees C). It also shows a good linearity relationship in the range of 0.5-5 and 5-100 ppm. The excellent NH3 sensing performance is mainly due to the formation of the p-n heterostructure in the nanocomposites.

引用

页数：6

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