Room temperature gas sensor based on tin dioxide@ polyaniline nanocomposite assembled on flexible substrate: ppb-level detection of NH3

被引：93

作者：

Li, Siqi ^{[1
,2
]}

Liu, Ao ^{[1
,2
]}

Yang, Zijie ^{[1
,2
]}

He, Junming ^{[1
,2
]}

Wang, Jing ^{[1
,2
]}

Liu, Fangmeng ^{[1
]}

Lu, Huiying ^{[1
,2
]}

Yan, Xu ^{[1
,2
]}

Sun, Peng ^{[1
,2
]}

Liang, Xishuang ^{[1
,2
]}

Gao, Yuan ^{[1
,2
]}

Lu, Geyu ^{[1
]}

机构：

[1] Jilin Univ, Key Lab Gas Sensors Jilin Prov, State Key Lab Integrated Optoelect, 2699 Qianjin St, Changchun 130012, Jilin, Peoples R China

[2] Jilin Univ, Coll Elect Sci & Engn, 2699 Qianjin St, Changchun 130012, Jilin, Peoples R China

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2019年 / 299卷

基金：

中国博士后科学基金;

关键词：

Room temperature NH3 sensor; ppb-Level detection of NH3; SnO2@ polyaniline hybrid; Flexible PET substrate; p-n heterojunction; THIN-FILM; AMMONIA SENSOR; SENSING PROPERTIES; ENHANCED SENSITIVITY; CARBON NANOTUBES; CONDUCTING FILMS; PET SUBSTRATE; PERFORMANCE; OXIDE; NANOSPHERES;

D O I：

10.1016/j.snb.2019.126970

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The SnO2@ Polyaniline (PANI) nanocomposites were successfully synthesized via a combined approach of hydrothermal and in-situ polymerization. The morphology and structure of the materials were characterized using SEM and TEM. The specific surface area was analyzed by the Brunauer-Emmett-Teller (BET) equation. The results showed that the materials had micro-structure and large specific surface area. The prepared materials were loaded on flexible polyethylene terephthalate (PET) substrate and their gas sensing properties were investigated at room temperature. Comparing with PANI sensor, the 20 mol% SnO2@ Polyaniline (PASn20) sensor exhibited 6.2 times higher response (R-gas/R-air = 29.8) to 100 ppm NH3 at room temperature. Furthermore, the PASn20 sensor possessed the ability to detect low NH3 concentrations of 10-200 ppb and outstanding selectivity. The enhanced sensing performance was attributed to the micro-structure with large specific surface area and the formation of p-n heterojunctions at the surface between PANI and SnO2.

引用

页数：7

共 49 条

[1] Preparation of conducting films based on α-MoO3/PANI hybrids and their sensing properties to triethylamine at room temperature [J].